Efficientformer (#20459)

- Adds EfficientFormer V1 to transformers
- PR co-authored by @novice03  and @Bearnardd 

Co-authored-by: novice <pranavpulijala@gmail.com>
Co-authored-by: novice <44259234+novice03@users.noreply.github.com>

README.md

@@ -316,6 +316,7 @@ Current number of checkpoints: ![](https://img.shields.io/endpoint?url=https://h
 1. **[Donut](https://huggingface.co/docs/transformers/model_doc/donut)** (from NAVER), released together with the paper [OCR-free Document Understanding Transformer](https://arxiv.org/abs/2111.15664) by Geewook Kim, Teakgyu Hong, Moonbin Yim, Jeongyeon Nam, Jinyoung Park, Jinyeong Yim, Wonseok Hwang, Sangdoo Yun, Dongyoon Han, Seunghyun Park.
 1. **[DPR](https://huggingface.co/docs/transformers/model_doc/dpr)** (from Facebook) released with the paper [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906) by Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, and Wen-tau Yih.
 1. **[DPT](https://huggingface.co/docs/transformers/master/model_doc/dpt)** (from Intel Labs) released with the paper [Vision Transformers for Dense Prediction](https://arxiv.org/abs/2103.13413) by René Ranftl, Alexey Bochkovskiy, Vladlen Koltun.
+1. **[EfficientFormer](https://huggingface.co/docs/transformers/main/model_doc/efficientformer)** (from Snap Research) released with the paper [EfficientFormer: Vision Transformers at MobileNetSpeed](https://arxiv.org/abs/2206.01191) by Yanyu Li, Geng Yuan, Yang Wen, Ju Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren.
 1. **[ELECTRA](https://huggingface.co/docs/transformers/model_doc/electra)** (from Google Research/Stanford University) released with the paper [ELECTRA: Pre-training text encoders as discriminators rather than generators](https://arxiv.org/abs/2003.10555) by Kevin Clark, Minh-Thang Luong, Quoc V. Le, Christopher D. Manning.
 1. **[EncoderDecoder](https://huggingface.co/docs/transformers/model_doc/encoder-decoder)** (from Google Research) released with the paper [Leveraging Pre-trained Checkpoints for Sequence Generation Tasks](https://arxiv.org/abs/1907.12461) by Sascha Rothe, Shashi Narayan, Aliaksei Severyn.
 1. **[ERNIE](https://huggingface.co/docs/transformers/model_doc/ernie)** (from Baidu) released with the paper [ERNIE: Enhanced Representation through Knowledge Integration](https://arxiv.org/abs/1904.09223) by Yu Sun, Shuohuan Wang, Yukun Li, Shikun Feng, Xuyi Chen, Han Zhang, Xin Tian, Danxiang Zhu, Hao Tian, Hua Wu.

README_es.md

@@ -309,6 +309,7 @@ Número actual de puntos de control: ![](https://img.shields.io/endpoint?url=htt
 1. **[Donut](https://huggingface.co/docs/transformers/model_doc/donut)** (from NAVER), released together with the paper [OCR-free Document Understanding Transformer](https://arxiv.org/abs/2111.15664) by Geewook Kim, Teakgyu Hong, Moonbin Yim, Jeongyeon Nam, Jinyoung Park, Jinyeong Yim, Wonseok Hwang, Sangdoo Yun, Dongyoon Han, Seunghyun Park.
 1. **[DPR](https://huggingface.co/docs/transformers/model_doc/dpr)** (from Facebook) released with the paper [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906) by Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, and Wen-tau Yih.
 1. **[DPT](https://huggingface.co/docs/transformers/master/model_doc/dpt)** (from Intel Labs) released with the paper [Vision Transformers for Dense Prediction](https://arxiv.org/abs/2103.13413) by René Ranftl, Alexey Bochkovskiy, Vladlen Koltun.
+1. **[EfficientFormer](https://huggingface.co/docs/transformers/main/model_doc/efficientformer)** (from Snap Research) released with the paper [EfficientFormer: Vision Transformers at MobileNetSpeed](https://arxiv.org/abs/2206.01191) by Yanyu Li, Geng Yuan, Yang Wen, Ju Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren.
 1. **[ELECTRA](https://huggingface.co/docs/transformers/model_doc/electra)** (from Google Research/Stanford University) released with the paper [ELECTRA: Pre-training text encoders as discriminators rather than generators](https://arxiv.org/abs/2003.10555) by Kevin Clark, Minh-Thang Luong, Quoc V. Le, Christopher D. Manning.
 1. **[EncoderDecoder](https://huggingface.co/docs/transformers/model_doc/encoder-decoder)** (from Google Research) released with the paper [Leveraging Pre-trained Checkpoints for Sequence Generation Tasks](https://arxiv.org/abs/1907.12461) by Sascha Rothe, Shashi Narayan, Aliaksei Severyn.
 1. **[ERNIE](https://huggingface.co/docs/transformers/model_doc/ernie)** (from Baidu) released with the paper [ERNIE: Enhanced Representation through Knowledge Integration](https://arxiv.org/abs/1904.09223) by Yu Sun, Shuohuan Wang, Yukun Li, Shikun Feng, Xuyi Chen, Han Zhang, Xin Tian, Danxiang Zhu, Hao Tian, Hua Wu.

README_hd.md

@@ -281,6 +281,7 @@ conda install -c huggingface transformers
 1. **[Donut](https://huggingface.co/docs/transformers/model_doc/donut)** (NAVER से) साथ में कागज [OCR-मुक्त डॉक्यूमेंट अंडरस्टैंडिंग ट्रांसफॉर्मर](https://arxiv.org/abs /2111.15664) गीवूक किम, टीकग्यू होंग, मूनबिन यिम, जियोंग्योन नाम, जिनयॉन्ग पार्क, जिनयॉन्ग यिम, वोनसेओक ह्वांग, सांगडू यूं, डोंगयून हान, सेउंग्युन पार्क द्वारा।
 1. **[DPR](https://huggingface.co/docs/transformers/model_doc/dpr)** (फेसबुक से) साथ में पेपर [ओपन-डोमेन क्वेश्चन आंसरिंग के लिए डेंस पैसेज रिट्रीवल](https://arxiv. org/abs/2004.04906) व्लादिमीर करपुखिन, बरलास ओज़ुज़, सेवन मिन, पैट्रिक लुईस, लेडेल वू, सर्गेई एडुनोव, डैनकी चेन, और वेन-ताऊ यिह द्वारा।
 1. **[DPT](https://huggingface.co/docs/transformers/master/model_doc/dpt)** (इंटेल लैब्स से) साथ में कागज [विज़न ट्रांसफॉर्मर्स फॉर डेंस प्रेडिक्शन](https://arxiv.org /abs/2103.13413) रेने रैनफ्टल, एलेक्सी बोचकोवस्की, व्लादलेन कोल्टन द्वारा।
+1. **[EfficientFormer](https://huggingface.co/docs/transformers/main/model_doc/efficientformer)** (from Snap Research) released with the paper [EfficientFormer: Vision Transformers at MobileNetSpeed](https://arxiv.org/abs/2206.01191) by Yanyu Li, Geng Yuan, Yang Wen, Ju Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren.
 1. **[ELECTRA](https://huggingface.co/docs/transformers/model_doc/electra)** (Google रिसर्च/स्टैनफोर्ड यूनिवर्सिटी से) साथ में दिया गया पेपर [इलेक्ट्रा: जेनरेटर के बजाय भेदभाव करने वाले के रूप में टेक्स्ट एन्कोडर्स का पूर्व-प्रशिक्षण] (https://arxiv.org/abs/2003.10555) केविन क्लार्क, मिन्ह-थांग लुओंग, क्वोक वी. ले, क्रिस्टोफर डी. मैनिंग द्वारा पोस्ट किया गया।
 1. **[EncoderDecoder](https://huggingface.co/docs/transformers/model_doc/encoder-decoder)** (Google रिसर्च से) साथ में दिया गया पेपर [सीक्वेंस जेनरेशन टास्क के लिए प्री-ट्रेंड चेकपॉइंट का इस्तेमाल करना](https:/ /arxiv.org/abs/1907.12461) साशा रोठे, शशि नारायण, अलियाक्सि सेवेरिन द्वारा।
 1. **[ERNIE](https://huggingface.co/docs/transformers/model_doc/ernie)**(Baidu से) साथ देने वाला पेपर [ERNIE: एन्हांस्ड रिप्रेजेंटेशन थ्रू नॉलेज इंटीग्रेशन](https://arxiv.org/abs/1904.09223) यू सन, शुओहुआन वांग, युकुन ली, शिकुन फेंग, ज़ुई चेन, हान झांग, शिन तियान, डैनक्सियांग झू, हाओ तियान, हुआ वू द्वारा पोस्ट किया गया।

README_ja.md

@@ -343,6 +343,7 @@ Flax、PyTorch、TensorFlowをcondaでインストールする方法は、それ
 1. **[Donut](https://huggingface.co/docs/transformers/model_doc/donut)** (NAVER から), Geewook Kim, Teakgyu Hong, Moonbin Yim, Jeongyeon Nam, Jinyoung Park, Jinyeong Yim, Wonseok Hwang, Sangdoo Yun, Dongyoon Han, Seunghyun Park から公開された研究論文: [OCR-free Document Understanding Transformer](https://arxiv.org/abs/2111.15664)
 1. **[DPR](https://huggingface.co/docs/transformers/model_doc/dpr)** (Facebook から) Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, and Wen-tau Yih から公開された研究論文: [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906)
 1. **[DPT](https://huggingface.co/docs/transformers/master/model_doc/dpt)** (Intel Labs から) René Ranftl, Alexey Bochkovskiy, Vladlen Koltun から公開された研究論文: [Vision Transformers for Dense Prediction](https://arxiv.org/abs/2103.13413)
+1. **[EfficientFormer](https://huggingface.co/docs/transformers/main/model_doc/efficientformer)** (Snap Research から) Yanyu Li, Geng Yuan, Yang Wen, Ju Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren. から公開された研究論文 [EfficientFormer: Vision Transformers at MobileNetSpeed](https://arxiv.org/abs/2206.01191)
 1. **[ELECTRA](https://huggingface.co/docs/transformers/model_doc/electra)** (Google Research/Stanford University から) Kevin Clark, Minh-Thang Luong, Quoc V. Le, Christopher D. Manning から公開された研究論文: [ELECTRA: Pre-training text encoders as discriminators rather than generators](https://arxiv.org/abs/2003.10555)
 1. **[EncoderDecoder](https://huggingface.co/docs/transformers/model_doc/encoder-decoder)** (Google Research から) Sascha Rothe, Shashi Narayan, Aliaksei Severyn から公開された研究論文: [Leveraging Pre-trained Checkpoints for Sequence Generation Tasks](https://arxiv.org/abs/1907.12461)
 1. **[ERNIE](https://huggingface.co/docs/transformers/model_doc/ernie)** (Baidu から) Yu Sun, Shuohuan Wang, Yukun Li, Shikun Feng, Xuyi Chen, Han Zhang, Xin Tian, Danxiang Zhu, Hao Tian, Hua Wu から公開された研究論文: [ERNIE: Enhanced Representation through Knowledge Integration](https://arxiv.org/abs/1904.09223)

README_ko.md

@@ -258,6 +258,7 @@ Flax, PyTorch, TensorFlow 설치 페이지에서 이들을 conda로 설치하는
 1. **[Donut](https://huggingface.co/docs/transformers/model_doc/donut)** (NAVER 에서) Geewook Kim, Teakgyu Hong, Moonbin Yim, Jeongyeon Nam, Jinyoung Park, Jinyeong Yim, Wonseok Hwang, Sangdoo Yun, Dongyoon Han, Seunghyun Park 의 [OCR-free Document Understanding Transformer](https://arxiv.org/abs/2111.15664) 논문과 함께 발표했습니다.
 1. **[DPR](https://huggingface.co/docs/transformers/model_doc/dpr)** (Facebook 에서) Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, and Wen-tau Yih 의 [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906) 논문과 함께 발표했습니다.
 1. **[DPT](https://huggingface.co/docs/transformers/master/model_doc/dpt)** (Intel Labs 에서) René Ranftl, Alexey Bochkovskiy, Vladlen Koltun 의 [Vision Transformers for Dense Prediction](https://arxiv.org/abs/2103.13413) 논문과 함께 발표했습니다.
+1. **[EfficientFormer](https://huggingface.co/docs/transformers/main/model_doc/efficientformer)** (from Snap Research) released with the paper [EfficientFormer: Vision Transformers at MobileNetSpeed](https://arxiv.org/abs/2206.01191) by Yanyu Li, Geng Yuan, Yang Wen, Ju Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren.
 1. **[ELECTRA](https://huggingface.co/docs/transformers/model_doc/electra)** (Google Research/Stanford University 에서) Kevin Clark, Minh-Thang Luong, Quoc V. Le, Christopher D. Manning 의 [ELECTRA: Pre-training text encoders as discriminators rather than generators](https://arxiv.org/abs/2003.10555) 논문과 함께 발표했습니다.
 1. **[EncoderDecoder](https://huggingface.co/docs/transformers/model_doc/encoder-decoder)** (Google Research 에서) Sascha Rothe, Shashi Narayan, Aliaksei Severyn 의 [Leveraging Pre-trained Checkpoints for Sequence Generation Tasks](https://arxiv.org/abs/1907.12461) 논문과 함께 발표했습니다.
 1. **[ERNIE](https://huggingface.co/docs/transformers/model_doc/ernie)** (Baidu 에서) Yu Sun, Shuohuan Wang, Yukun Li, Shikun Feng, Xuyi Chen, Han Zhang, Xin Tian, Danxiang Zhu, Hao Tian, Hua Wu 의 [ERNIE: Enhanced Representation through Knowledge Integration](https://arxiv.org/abs/1904.09223) 논문과 함께 발표했습니다.

README_zh-hans.md

@@ -282,6 +282,7 @@ conda install -c huggingface transformers
 1. **[Donut](https://huggingface.co/docs/transformers/model_doc/donut)** (来自 NAVER) 伴随论文 [OCR-free Document Understanding Transformer](https://arxiv.org/abs/2111.15664) 由 Geewook Kim, Teakgyu Hong, Moonbin Yim, Jeongyeon Nam, Jinyoung Park, Jinyeong Yim, Wonseok Hwang, Sangdoo Yun, Dongyoon Han, Seunghyun Park 发布。
 1. **[DPR](https://huggingface.co/docs/transformers/model_doc/dpr)** (来自 Facebook) 伴随论文 [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906) 由 Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, and Wen-tau Yih 发布。
 1. **[DPT](https://huggingface.co/docs/transformers/master/model_doc/dpt)** (来自 Intel Labs) 伴随论文 [Vision Transformers for Dense Prediction](https://arxiv.org/abs/2103.13413) 由 René Ranftl, Alexey Bochkovskiy, Vladlen Koltun 发布。
+1. **[EfficientFormer](https://huggingface.co/docs/transformers/main/model_doc/efficientformer)** (来自 Snap Research) 伴随论文 [EfficientFormer: Vision Transformers at MobileNetSpeed](https://arxiv.org/abs/2206.01191) 由 Yanyu Li, Geng Yuan, Yang Wen, Ju Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren 发布。
 1. **[ELECTRA](https://huggingface.co/docs/transformers/model_doc/electra)** (来自 Google Research/Stanford University) 伴随论文 [ELECTRA: Pre-training text encoders as discriminators rather than generators](https://arxiv.org/abs/2003.10555) 由 Kevin Clark, Minh-Thang Luong, Quoc V. Le, Christopher D. Manning 发布。
 1. **[EncoderDecoder](https://huggingface.co/docs/transformers/model_doc/encoder-decoder)** (来自 Google Research) 伴随论文 [Leveraging Pre-trained Checkpoints for Sequence Generation Tasks](https://arxiv.org/abs/1907.12461) 由 Sascha Rothe, Shashi Narayan, Aliaksei Severyn 发布。
 1. **[ERNIE](https://huggingface.co/docs/transformers/model_doc/ernie)** (来自 Baidu) 伴随论文 [ERNIE: Enhanced Representation through Knowledge Integration](https://arxiv.org/abs/1904.09223) by Yu Sun, Shuohuan Wang, Yukun Li, Shikun Feng, Xuyi Chen, Han Zhang, Xin Tian, Danxiang Zhu, Hao Tian, Hua Wu 发布。

README_zh-hant.md

@@ -294,6 +294,7 @@ conda install -c huggingface transformers
 1. **[Donut](https://huggingface.co/docs/transformers/model_doc/donut)** (from NAVER) released with the paper [OCR-free Document Understanding Transformer](https://arxiv.org/abs/2111.15664) by Geewook Kim, Teakgyu Hong, Moonbin Yim, Jeongyeon Nam, Jinyoung Park, Jinyeong Yim, Wonseok Hwang, Sangdoo Yun, Dongyoon Han, Seunghyun Park.
 1. **[DPR](https://huggingface.co/docs/transformers/model_doc/dpr)** (from Facebook) released with the paper [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906) by Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, and Wen-tau Yih.
 1. **[DPT](https://huggingface.co/docs/transformers/master/model_doc/dpt)** (from Intel Labs) released with the paper [Vision Transformers for Dense Prediction](https://arxiv.org/abs/2103.13413) by René Ranftl, Alexey Bochkovskiy, Vladlen Koltun.
+1. **[EfficientFormer](https://huggingface.co/docs/transformers/main/model_doc/efficientformer)** (from Snap Research) released with the paper [EfficientFormer: Vision Transformers at MobileNetSpeed](https://arxiv.org/abs/2206.01191) by Yanyu Li, Geng Yuan, Yang Wen, Ju Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren.
 1. **[ELECTRA](https://huggingface.co/docs/transformers/model_doc/electra)** (from Google Research/Stanford University) released with the paper [ELECTRA: Pre-training text encoders as discriminators rather than generators](https://arxiv.org/abs/2003.10555) by Kevin Clark, Minh-Thang Luong, Quoc V. Le, Christopher D. Manning.
 1. **[EncoderDecoder](https://huggingface.co/docs/transformers/model_doc/encoder-decoder)** (from Google Research) released with the paper [Leveraging Pre-trained Checkpoints for Sequence Generation Tasks](https://arxiv.org/abs/1907.12461) by Sascha Rothe, Shashi Narayan, Aliaksei Severyn.
 1. **[ERNIE](https://huggingface.co/docs/transformers/model_doc/ernie)** (from Baidu) released with the paper [ERNIE: Enhanced Representation through Knowledge Integration](https://arxiv.org/abs/1904.09223) by Yu Sun, Shuohuan Wang, Yukun Li, Shikun Feng, Xuyi Chen, Han Zhang, Xin Tian, Danxiang Zhu, Hao Tian, Hua Wu.

docs/source/en/_toctree.yml

@@ -420,6 +420,8 @@
         title: DiT
       - local: model_doc/dpt
         title: DPT
+      - local: model_doc/efficientformer
+        title: EfficientFormer
       - local: model_doc/glpn
         title: GLPN
       - local: model_doc/imagegpt

docs/source/en/index.mdx

@@ -95,6 +95,7 @@ The documentation is organized into five sections:
 1. **[Donut](model_doc/donut)** (from NAVER), released together with the paper [OCR-free Document Understanding Transformer](https://arxiv.org/abs/2111.15664) by Geewook Kim, Teakgyu Hong, Moonbin Yim, Jeongyeon Nam, Jinyoung Park, Jinyeong Yim, Wonseok Hwang, Sangdoo Yun, Dongyoon Han, Seunghyun Park.
 1. **[DPR](model_doc/dpr)** (from Facebook) released with the paper [Dense Passage Retrieval for Open-Domain Question Answering](https://arxiv.org/abs/2004.04906) by Vladimir Karpukhin, Barlas Oğuz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, and Wen-tau Yih.
 1. **[DPT](master/model_doc/dpt)** (from Intel Labs) released with the paper [Vision Transformers for Dense Prediction](https://arxiv.org/abs/2103.13413) by René Ranftl, Alexey Bochkovskiy, Vladlen Koltun.
+1. **[EfficientFormer](model_doc/efficientformer)** (from Snap Research) released with the paper [EfficientFormer: Vision Transformers at MobileNetSpeed](https://arxiv.org/abs/2206.01191) by Yanyu Li, Geng Yuan, Yang Wen, Ju Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren.
 1. **[ELECTRA](model_doc/electra)** (from Google Research/Stanford University) released with the paper [ELECTRA: Pre-training text encoders as discriminators rather than generators](https://arxiv.org/abs/2003.10555) by Kevin Clark, Minh-Thang Luong, Quoc V. Le, Christopher D. Manning.
 1. **[EncoderDecoder](model_doc/encoder-decoder)** (from Google Research) released with the paper [Leveraging Pre-trained Checkpoints for Sequence Generation Tasks](https://arxiv.org/abs/1907.12461) by Sascha Rothe, Shashi Narayan, Aliaksei Severyn.
 1. **[ERNIE](model_doc/ernie)** (from Baidu) released with the paper [ERNIE: Enhanced Representation through Knowledge Integration](https://arxiv.org/abs/1904.09223) by Yu Sun, Shuohuan Wang, Yukun Li, Shikun Feng, Xuyi Chen, Han Zhang, Xin Tian, Danxiang Zhu, Hao Tian, Hua Wu.
@@ -274,6 +275,7 @@ Flax), PyTorch, and/or TensorFlow.
 |           DonutSwin           |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
 |              DPR              |       ✅       |       ✅       |       ✅        |         ✅         |      ❌      |
 |              DPT              |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
+|        EfficientFormer        |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |
 |            ELECTRA            |       ✅       |       ✅       |       ✅        |         ✅         |      ✅      |
 |        Encoder decoder        |       ❌       |       ❌       |       ✅        |         ✅         |      ✅      |
 |             ERNIE             |       ❌       |       ❌       |       ✅        |         ❌         |      ❌      |

docs/source/en/model_doc/efficientformer.mdx

@@ -0,0 +1,65 @@
+<!--Copyright 2022 The HuggingFace Team. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+the License. You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+specific language governing permissions and limitations under the License.
+-->
+
+# EfficientFormer
+
+## Overview
+
+The EfficientFormer model was proposed in [EfficientFormer: Vision Transformers at MobileNet Speed](https://arxiv.org/abs/2206.01191) 
+by Yanyu Li, Geng Yuan, Yang Wen, Eric Hu, Georgios Evangelidis, Sergey Tulyakov, Yanzhi Wang, Jian Ren.  EfficientFormer proposes a
+dimension-consistent pure transformer that can be run on mobile devices for dense prediction tasks like image classification, object
+detection and semantic segmentation.
+
+The abstract from the paper is the following:
+
+*Vision Transformers (ViT) have shown rapid progress in computer vision tasks, achieving promising results on various benchmarks. 
+However, due to the massive number of parameters and model design, e.g., attention mechanism, ViT-based models are generally 
+times slower than lightweight convolutional networks. Therefore, the deployment of ViT for real-time applications is particularly 
+challenging, especially on resource-constrained hardware such as mobile devices. Recent efforts try to reduce the computation 
+complexity of ViT through network architecture search or hybrid design with MobileNet block, yet the inference speed is still 
+unsatisfactory. This leads to an important question: can transformers run as fast as MobileNet while obtaining high performance? 
+To answer this, we first revisit the network architecture and operators used in ViT-based models and identify inefficient designs. 
+Then we introduce a dimension-consistent pure transformer (without MobileNet blocks) as a design paradigm. 
+Finally, we perform latency-driven slimming to get a series of final models dubbed EfficientFormer. 
+Extensive experiments show the superiority of EfficientFormer in performance and speed on mobile devices. 
+Our fastest model, EfficientFormer-L1, achieves 79.2% top-1 accuracy on ImageNet-1K with only 1.6 ms inference latency on 
+iPhone 12 (compiled with CoreML), which { runs as fast as MobileNetV2×1.4 (1.6 ms, 74.7% top-1),} and our largest model, 
+EfficientFormer-L7, obtains 83.3% accuracy with only 7.0 ms latency. Our work proves that properly designed transformers can 
+reach extremely low latency on mobile devices while maintaining high performance.*
+
+This model was contributed by [novice03](https://huggingface.co/novice03) and [Bearnardd](https://huggingface.co/Bearnardd).
+The original code can be found [here](https://github.com/snap-research/EfficientFormer).
+
+
+## EfficientFormerConfig
+
+[[autodoc]] EfficientFormerConfig
+
+## EfficientFormerImageProcessor
+
+[[autodoc]] EfficientFormerImageProcessor
+    - preprocess
+
+## EfficientFormerModel
+
+[[autodoc]] EfficientFormerModel
+    - forward
+
+## EfficientFormerForImageClassification
+
+[[autodoc]] EfficientFormerForImageClassification
+    - forward
+
+## EfficientFormerForImageClassificationWithTeacher
+
+[[autodoc]] EfficientFormerForImageClassificationWithTeacher
+    - forward

src/transformers/__init__.py

@@ -244,6 +244,7 @@ _import_structure = {
         "DPRReaderTokenizer",
     ],
     "models.dpt": ["DPT_PRETRAINED_CONFIG_ARCHIVE_MAP", "DPTConfig"],
+    "models.efficientformer": ["EFFICIENTFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP", "EfficientFormerConfig"],
     "models.electra": ["ELECTRA_PRETRAINED_CONFIG_ARCHIVE_MAP", "ElectraConfig", "ElectraTokenizer"],
     "models.encoder_decoder": ["EncoderDecoderConfig"],
     "models.ernie": [
@@ -791,6 +792,7 @@ else:
     _import_structure["models.detr"].extend(["DetrFeatureExtractor", "DetrImageProcessor"])
     _import_structure["models.donut"].extend(["DonutFeatureExtractor", "DonutImageProcessor"])
     _import_structure["models.dpt"].extend(["DPTFeatureExtractor", "DPTImageProcessor"])
+    _import_structure["models.efficientformer"].append("EfficientFormerImageProcessor")
     _import_structure["models.flava"].extend(["FlavaFeatureExtractor", "FlavaImageProcessor", "FlavaProcessor"])
     _import_structure["models.glpn"].extend(["GLPNFeatureExtractor", "GLPNImageProcessor"])
     _import_structure["models.imagegpt"].extend(["ImageGPTFeatureExtractor", "ImageGPTImageProcessor"])
@@ -1374,6 +1376,15 @@ else:
             "DPTPreTrainedModel",
         ]
     )
+    _import_structure["models.efficientformer"].extend(
+        [
+            "EFFICIENTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST",
+            "EfficientFormerForImageClassification",
+            "EfficientFormerForImageClassificationWithTeacher",
+            "EfficientFormerModel",
+            "EfficientFormerPreTrainedModel",
+        ]
+    )
     _import_structure["models.electra"].extend(
         [
             "ELECTRA_PRETRAINED_MODEL_ARCHIVE_LIST",
@@ -3658,6 +3669,7 @@ if TYPE_CHECKING:
         DPRReaderTokenizer,
     )
     from .models.dpt import DPT_PRETRAINED_CONFIG_ARCHIVE_MAP, DPTConfig
+    from .models.efficientformer import EFFICIENTFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP, EfficientFormerConfig
     from .models.electra import ELECTRA_PRETRAINED_CONFIG_ARCHIVE_MAP, ElectraConfig, ElectraTokenizer
     from .models.encoder_decoder import EncoderDecoderConfig
     from .models.ernie import ERNIE_PRETRAINED_CONFIG_ARCHIVE_MAP, ErnieConfig
@@ -4133,6 +4145,7 @@ if TYPE_CHECKING:
         from .models.detr import DetrFeatureExtractor, DetrImageProcessor
         from .models.donut import DonutFeatureExtractor, DonutImageProcessor
         from .models.dpt import DPTFeatureExtractor, DPTImageProcessor
+        from .models.efficientformer import EfficientFormerImageProcessor
         from .models.flava import FlavaFeatureExtractor, FlavaImageProcessor, FlavaProcessor
         from .models.glpn import GLPNFeatureExtractor, GLPNImageProcessor
         from .models.imagegpt import ImageGPTFeatureExtractor, ImageGPTImageProcessor
@@ -4619,6 +4632,13 @@ if TYPE_CHECKING:
             DPTModel,
             DPTPreTrainedModel,
         )
+        from .models.efficientformer import (
+            EFFICIENTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST,
+            EfficientFormerForImageClassification,
+            EfficientFormerForImageClassificationWithTeacher,
+            EfficientFormerModel,
+            EfficientFormerPreTrainedModel,
+        )
         from .models.electra import (
             ELECTRA_PRETRAINED_MODEL_ARCHIVE_LIST,
             ElectraForCausalLM,

src/transformers/models/__init__.py

@@ -65,6 +65,7 @@ from . import (
     donut,
     dpr,
     dpt,
+    efficientformer,
     electra,
     encoder_decoder,
     ernie,

src/transformers/models/auto/configuration_auto.py

@@ -69,6 +69,7 @@ CONFIG_MAPPING_NAMES = OrderedDict(
         ("donut-swin", "DonutSwinConfig"),
         ("dpr", "DPRConfig"),
         ("dpt", "DPTConfig"),
+        ("efficientformer", "EfficientFormerConfig"),
         ("electra", "ElectraConfig"),
         ("encoder-decoder", "EncoderDecoderConfig"),
         ("ernie", "ErnieConfig"),
@@ -233,6 +234,7 @@ CONFIG_ARCHIVE_MAP_MAPPING_NAMES = OrderedDict(
         ("donut-swin", "DONUT_SWIN_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("dpr", "DPR_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("dpt", "DPT_PRETRAINED_CONFIG_ARCHIVE_MAP"),
+        ("efficientformer", "EFFICIENTFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("electra", "ELECTRA_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("ernie", "ERNIE_PRETRAINED_CONFIG_ARCHIVE_MAP"),
         ("esm", "ESM_PRETRAINED_CONFIG_ARCHIVE_MAP"),
@@ -393,6 +395,7 @@ MODEL_NAMES_MAPPING = OrderedDict(
         ("donut-swin", "DonutSwin"),
         ("dpr", "DPR"),
         ("dpt", "DPT"),
+        ("efficientformer", "EfficientFormer"),
         ("electra", "ELECTRA"),
         ("encoder-decoder", "Encoder decoder"),
         ("ernie", "ERNIE"),

src/transformers/models/auto/image_processing_auto.py

@@ -53,6 +53,7 @@ IMAGE_PROCESSOR_MAPPING_NAMES = OrderedDict(
         ("dinat", "ViTImageProcessor"),
         ("donut-swin", "DonutImageProcessor"),
         ("dpt", "DPTImageProcessor"),
+        ("efficientformer", "EfficientFormerImageProcessor"),
         ("flava", "FlavaImageProcessor"),
         ("git", ("CLIPImageProcessor", "VideoMAEImageProcessor")),
         ("glpn", "GLPNImageProcessor"),

src/transformers/models/auto/modeling_auto.py

@@ -69,6 +69,7 @@ MODEL_MAPPING_NAMES = OrderedDict(
         ("donut-swin", "DonutSwinModel"),
         ("dpr", "DPRQuestionEncoder"),
         ("dpt", "DPTModel"),
+        ("efficientformer", "EfficientFormerModel"),
         ("electra", "ElectraModel"),
         ("ernie", "ErnieModel"),
         ("esm", "EsmModel"),
@@ -397,6 +398,13 @@ MODEL_FOR_IMAGE_CLASSIFICATION_MAPPING_NAMES = OrderedDict(
         ("data2vec-vision", "Data2VecVisionForImageClassification"),
         ("deit", ("DeiTForImageClassification", "DeiTForImageClassificationWithTeacher")),
         ("dinat", "DinatForImageClassification"),
+        (
+            "efficientformer",
+            (
+                "EfficientFormerForImageClassification",
+                "EfficientFormerForImageClassificationWithTeacher",
+            ),
+        ),
         ("imagegpt", "ImageGPTForImageClassification"),
         ("levit", ("LevitForImageClassification", "LevitForImageClassificationWithTeacher")),
         ("mobilenet_v1", "MobileNetV1ForImageClassification"),

src/transformers/models/efficientformer/__init__.py

@@ -0,0 +1,80 @@
+# flake8: noqa
+# There's no way to ignore "F401 '...' imported but unused" warnings in this
+# module, but to preserve other warnings. So, don't check this module at all.
+
+# Copyright 2022 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from typing import TYPE_CHECKING
+
+from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available, is_vision_available
+
+
+_import_structure = {
+    "configuration_efficientformer": [
+        "EFFICIENTFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP",
+        "EfficientFormerConfig",
+    ]
+}
+
+try:
+    if not is_vision_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["image_processing_efficientformer"] = ["EfficientFormerImageProcessor"]
+
+try:
+    if not is_torch_available():
+        raise OptionalDependencyNotAvailable()
+except OptionalDependencyNotAvailable:
+    pass
+else:
+    _import_structure["modeling_efficientformer"] = [
+        "EFFICIENTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST",
+        "EfficientFormerForImageClassification",
+        "EfficientFormerForImageClassificationWithTeacher",
+        "EfficientFormerModel",
+        "EfficientFormerPreTrainedModel",
+    ]
+
+if TYPE_CHECKING:
+    from .configuration_efficientformer import EFFICIENTFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP, EfficientFormerConfig
+
+    try:
+        if not is_vision_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .image_processing_efficientformer import EfficientFormerImageProcessor
+
+    try:
+        if not is_torch_available():
+            raise OptionalDependencyNotAvailable()
+    except OptionalDependencyNotAvailable:
+        pass
+    else:
+        from .modeling_efficientformer import (
+            EFFICIENTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST,
+            EfficientFormerForImageClassification,
+            EfficientFormerForImageClassificationWithTeacher,
+            EfficientFormerModel,
+            EfficientFormerPreTrainedModel,
+        )
+
+else:
+    import sys
+
+    sys.modules[__name__] = _LazyModule(__name__, globals()["__file__"], _import_structure, module_spec=__spec__)

src/transformers/models/efficientformer/configuration_efficientformer.py

@@ -0,0 +1,167 @@
+# coding=utf-8
+# Copyright 2022 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" EfficientFormer model configuration"""
+
+from typing import List
+
+from ...configuration_utils import PretrainedConfig
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+EFFICIENTFORMER_PRETRAINED_CONFIG_ARCHIVE_MAP = {
+    "snap-research/efficientformer-l1-300": (
+        "https://huggingface.co/snap-research/efficientformer-l1-300/resolve/main/config.json"
+    ),
+}
+
+
+class EfficientFormerConfig(PretrainedConfig):
+    r"""
+    This is the configuration class to store the configuration of an [`EfficientFormerModel`]. It is used to
+    instantiate an EfficientFormer model according to the specified arguments, defining the model architecture.
+    Instantiating a configuration with the defaults will yield a similar configuration to that of the EfficientFormer
+    [snap-research/efficientformer-l1](https://huggingface.co/snap-research/efficientformer-l1) architecture.
+
+    Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
+    documentation from [`PretrainedConfig`] for more information.
+
+    Args:
+        depths (`List(int)`, *optional*, defaults to `[3, 2, 6, 4]`)
+            Depth of each stage.
+        hidden_sizes (`List(int)`, *optional*, defaults to `[48, 96, 224, 448]`)
+            Dimensionality of each stage.
+        downsamples (`List(bool)`, *optional*, defaults to `[True, True, True, True]`)
+            Whether or not to downsample inputs between two stages.
+        dim (`int`, *optional*, defaults to 448):
+            Number of channels in Meta3D layers
+        key_dim (`int`, *optional*, defaults to 32):
+            The size of the key in meta3D block.
+        attention_ratio (`int`, *optional*, defaults to 4):
+            Ratio of the dimension of the query and value to the dimension of the key in MSHA block
+        resolution (`int`, *optional*, defaults to 5)
+            Size of each patch
+        num_hidden_layers (`int`, *optional*, defaults to 5):
+            Number of hidden layers in the Transformer encoder.
+        num_attention_heads (`int`, *optional*, defaults to 8):
+            Number of attention heads for each attention layer in the 3D MetaBlock.
+        mlp_expansion_ratio (`int`, *optional*, defaults to 4):
+            Ratio of size of the hidden dimensionality of an MLP to the dimensionality of its input.
+        hidden_dropout_prob (`float`, *optional*, defaults to 0.1):
+            The dropout probability for all fully connected layers in the embeddings and encoder.
+        patch_size (`int`, *optional*, defaults to 16):
+            The size (resolution) of each patch.
+        num_channels (`int`, *optional*, defaults to 3):
+            The number of input channels.
+        pool_size (`int`, *optional*, defaults to 3):
+            Kernel size of pooling layers.
+        downsample_patch_size (`int`, *optional*, defaults to 3):
+            The size of patches in downsampling layers.
+        downsample_stride (`int`, *optional*, defaults to 2):
+            The stride of convolution kernels in downsampling layers.
+        downsample_pad (`int`, *optional*, defaults to 1):
+            Padding in downsampling layers.
+        drop_path_rate (`int`, *optional*, defaults to 0):
+            Rate at which to increase dropout probability in DropPath.
+        num_meta3d_blocks (`int`, *optional*, defaults to 1):
+            The number of 3D MetaBlocks in the last stage.
+        distillation (`bool`, *optional*, defaults to `True`):
+            Whether to add a distillation head.
+        use_layer_scale (`bool`, *optional*, defaults to `True`):
+            Whether to scale outputs from token mixers.
+        layer_scale_init_value (`float`, *optional*, defaults to 1e-5):
+            Factor by which outputs from token mixers are scaled.
+        hidden_act (`str` or `function`, *optional*, defaults to `"gelu"`):
+            The non-linear activation function (function or string) in the encoder and pooler. If string, `"gelu"`,
+            `"relu"`, `"selu"` and `"gelu_new"` are supported.
+        initializer_range (`float`, *optional*, defaults to 0.02):
+            The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
+        layer_norm_eps (`float`, *optional*, defaults to 1e-12):
+            The epsilon used by the layer normalization layers.
+
+    Example:
+
+    ```python
+    >>> from transformers import EfficientFormerConfig, EfficientFormerModel
+
+    >>> # Initializing a EfficientFormer efficientformer-l1 style configuration
+    >>> configuration = EfficientFormerConfig()
+
+    >>> # Initializing a EfficientFormerModel (with random weights) from the efficientformer-l3 style configuration
+    >>> model = EfficientFormerModel(configuration)
+
+    >>> # Accessing the model configuration
+    >>> configuration = model.config
+    ```"""
+
+    model_type = "efficientformer"
+
+    def __init__(
+        self,
+        depths: List[int] = [3, 2, 6, 4],
+        hidden_sizes: List[int] = [48, 96, 224, 448],
+        downsamples: List[bool] = [True, True, True, True],
+        dim: int = 448,
+        key_dim: int = 32,
+        attention_ratio: int = 4,
+        resolution: int = 7,
+        num_hidden_layers: int = 5,
+        num_attention_heads: int = 8,
+        mlp_expansion_ratio: int = 4,
+        hidden_dropout_prob: float = 0.0,
+        patch_size: int = 16,
+        num_channels: int = 3,
+        pool_size: int = 3,
+        downsample_patch_size: int = 3,
+        downsample_stride: int = 2,
+        downsample_pad: int = 1,
+        drop_path_rate: float = 0.0,
+        num_meta3d_blocks: int = 1,
+        distillation: bool = True,
+        use_layer_scale: bool = True,
+        layer_scale_init_value: float = 1e-5,
+        hidden_act: str = "gelu",
+        initializer_range: float = 0.02,
+        layer_norm_eps: float = 1e-12,
+        **kwargs
+    ) -> None:
+        super().__init__(**kwargs)
+
+        self.hidden_act = hidden_act
+        self.hidden_dropout_prob = hidden_dropout_prob
+        self.hidden_sizes = hidden_sizes
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.initializer_range = initializer_range
+        self.layer_norm_eps = layer_norm_eps
+        self.patch_size = patch_size
+        self.num_channels = num_channels
+        self.depths = depths
+        self.mlp_expansion_ratio = mlp_expansion_ratio
+        self.downsamples = downsamples
+        self.dim = dim
+        self.key_dim = key_dim
+        self.attention_ratio = attention_ratio
+        self.resolution = resolution
+        self.pool_size = pool_size
+        self.downsample_patch_size = downsample_patch_size
+        self.downsample_stride = downsample_stride
+        self.downsample_pad = downsample_pad
+        self.drop_path_rate = drop_path_rate
+        self.num_meta3d_blocks = num_meta3d_blocks
+        self.distillation = distillation
+        self.use_layer_scale = use_layer_scale
+        self.layer_scale_init_value = layer_scale_init_value

src/transformers/models/efficientformer/convert_efficientformer_original_pytorch_checkpoint_to_pytorch.py

@@ -0,0 +1,252 @@
+# coding=utf-8
+# Copyright 2022 The HuggingFace Inc. team.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Convert EfficientFormer checkpoints from the original repository.
+
+URL: https://github.com/snap-research/EfficientFormer
+"""
+
+import argparse
+import re
+from pathlib import Path
+
+import torch
+from PIL import Image
+from torchvision.transforms import CenterCrop, Compose, Normalize, Resize, ToTensor
+
+import requests
+from transformers import (
+    EfficientFormerConfig,
+    EfficientFormerForImageClassificationWithTeacher,
+    EfficientFormerImageProcessor,
+)
+from transformers.image_utils import IMAGENET_DEFAULT_MEAN, IMAGENET_DEFAULT_STD, PILImageResampling
+
+
+def rename_key(old_name, num_meta4D_last_stage):
+    new_name = old_name
+
+    if "patch_embed" in old_name:
+        _, layer, param = old_name.split(".")
+
+        if layer == "0":
+            new_name = old_name.replace("0", "convolution1")
+        elif layer == "1":
+            new_name = old_name.replace("1", "batchnorm_before")
+        elif layer == "3":
+            new_name = old_name.replace("3", "convolution2")
+        else:
+            new_name = old_name.replace("4", "batchnorm_after")
+
+    if "network" in old_name and re.search("\d\.\d", old_name):
+        two_digit_num = r"\b\d{2}\b"
+        if bool(re.search(two_digit_num, old_name)):
+            match = re.search("\d\.\d\d.", old_name).group()
+        else:
+            match = re.search("\d\.\d.", old_name).group()
+        if int(match[0]) < 6:
+            trimmed_name = old_name.replace(match, "")
+            trimmed_name = trimmed_name.replace("network", match[0] + ".meta4D_layers.blocks." + match[2:-1])
+            new_name = "intermediate_stages." + trimmed_name
+        else:
+            trimmed_name = old_name.replace(match, "")
+            if int(match[2]) < num_meta4D_last_stage:
+                trimmed_name = trimmed_name.replace("network", "meta4D_layers.blocks." + match[2])
+            else:
+                layer_index = str(int(match[2]) - num_meta4D_last_stage)
+                trimmed_name = trimmed_name.replace("network", "meta3D_layers.blocks." + layer_index)
+                if "norm1" in old_name:
+                    trimmed_name = trimmed_name.replace("norm1", "layernorm1")
+                elif "norm2" in old_name:
+                    trimmed_name = trimmed_name.replace("norm2", "layernorm2")
+                elif "fc1" in old_name:
+                    trimmed_name = trimmed_name.replace("fc1", "linear_in")
+                elif "fc2" in old_name:
+                    trimmed_name = trimmed_name.replace("fc2", "linear_out")
+
+            new_name = "last_stage." + trimmed_name
+
+    elif "network" in old_name and re.search(".\d.", old_name):
+        new_name = old_name.replace("network", "intermediate_stages")
+
+    if "fc" in new_name:
+        new_name = new_name.replace("fc", "convolution")
+    elif ("norm1" in new_name) and ("layernorm1" not in new_name):
+        new_name = new_name.replace("norm1", "batchnorm_before")
+    elif ("norm2" in new_name) and ("layernorm2" not in new_name):
+        new_name = new_name.replace("norm2", "batchnorm_after")
+    if "proj" in new_name:
+        new_name = new_name.replace("proj", "projection")
+    if "dist_head" in new_name:
+        new_name = new_name.replace("dist_head", "distillation_classifier")
+    elif "head" in new_name:
+        new_name = new_name.replace("head", "classifier")
+    elif "patch_embed" in new_name:
+        new_name = "efficientformer." + new_name
+    elif new_name == "norm.weight" or new_name == "norm.bias":
+        new_name = new_name.replace("norm", "layernorm")
+        new_name = "efficientformer." + new_name
+    else:
+        new_name = "efficientformer.encoder." + new_name
+
+    return new_name
+
+
+def convert_torch_checkpoint(checkpoint, num_meta4D_last_stage):
+    for key in checkpoint.copy().keys():
+        val = checkpoint.pop(key)
+        checkpoint[rename_key(key, num_meta4D_last_stage)] = val
+
+    return checkpoint
+
+
+# We will verify our results on a COCO image
+def prepare_img():
+    url = "http://images.cocodataset.org/val2017/000000039769.jpg"
+    image = Image.open(requests.get(url, stream=True).raw)
+
+    return image
+
+
+def convert_efficientformer_checkpoint(
+    checkpoint_path: Path, efficientformer_config_file: Path, pytorch_dump_path: Path, push_to_hub: bool
+):
+    orig_state_dict = torch.load(checkpoint_path, map_location="cpu")["model"]
+    config = EfficientFormerConfig.from_json_file(efficientformer_config_file)
+    model = EfficientFormerForImageClassificationWithTeacher(config)
+    model_name = "_".join(checkpoint_path.split("/")[-1].split(".")[0].split("_")[:-1])
+
+    num_meta4D_last_stage = config.depths[-1] - config.num_meta3d_blocks + 1
+    new_state_dict = convert_torch_checkpoint(orig_state_dict, num_meta4D_last_stage)
+
+    model.load_state_dict(new_state_dict)
+    model.eval()
+
+    pillow_resamplings = {
+        "bilinear": PILImageResampling.BILINEAR,
+        "bicubic": PILImageResampling.BICUBIC,
+        "nearest": PILImageResampling.NEAREST,
+    }
+
+    # prepare image
+    image = prepare_img()
+    image_size = 256
+    crop_size = 224
+    processor = EfficientFormerImageProcessor(
+        size={"shortest_edge": image_size},
+        crop_size={"height": crop_size, "width": crop_size},
+        resample=pillow_resamplings["bicubic"],
+    )
+    pixel_values = processor(images=image, return_tensors="pt").pixel_values
+
+    # original processing pipeline
+    image_transforms = Compose(
+        [
+            Resize(image_size, interpolation=pillow_resamplings["bicubic"]),
+            CenterCrop(crop_size),
+            ToTensor(),
+            Normalize(IMAGENET_DEFAULT_MEAN, IMAGENET_DEFAULT_STD),
+        ]
+    )
+    original_pixel_values = image_transforms(image).unsqueeze(0)
+
+    assert torch.allclose(original_pixel_values, pixel_values)
+
+    outputs = model(pixel_values)
+    logits = outputs.logits
+
+    expected_shape = (1, 1000)
+
+    if "l1" in model_name:
+        expected_logits = torch.Tensor(
+            [-0.1312, 0.4353, -1.0499, -0.5124, 0.4183, -0.6793, -1.3777, -0.0893, -0.7358, -2.4328]
+        )
+        assert torch.allclose(logits[0, :10], expected_logits, atol=1e-3)
+        assert logits.shape == expected_shape
+    elif "l3" in model_name:
+        expected_logits = torch.Tensor(
+            [-1.3150, -1.5456, -1.2556, -0.8496, -0.7127, -0.7897, -0.9728, -0.3052, 0.3751, -0.3127]
+        )
+        assert torch.allclose(logits[0, :10], expected_logits, atol=1e-3)
+        assert logits.shape == expected_shape
+    elif "l7" in model_name:
+        expected_logits = torch.Tensor(
+            [-1.0283, -1.4131, -0.5644, -1.3115, -0.5785, -1.2049, -0.7528, 0.1992, -0.3822, -0.0878]
+        )
+        assert logits.shape == expected_shape
+    else:
+        raise ValueError(
+            f"Unknown model checkpoint: {checkpoint_path}. Supported version of efficientformer are l1, l3 and l7"
+        )
+
+    # Save Checkpoints
+    Path(pytorch_dump_path).mkdir(exist_ok=True)
+    model.save_pretrained(pytorch_dump_path)
+    print(f"Checkpoint successfuly converted. Model saved at {pytorch_dump_path}")
+    processor.save_pretrained(pytorch_dump_path)
+    print(f"Processor successfuly saved at {pytorch_dump_path}")
+
+    if push_to_hub:
+        print("Pushing model to the hub...")
+
+        model.push_to_hub(
+            repo_id=f"Bearnardd/{pytorch_dump_path}",
+            commit_message="Add model",
+            use_temp_dir=True,
+        )
+        processor.push_to_hub(
+            repo_id=f"Bearnardd/{pytorch_dump_path}",
+            commit_message="Add feature extractor",
+            use_temp_dir=True,
+        )
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    # Required parameters
+    parser.add_argument(
+        "--pytorch_model_path",
+        default=None,
+        type=str,
+        required=True,
+        help="Path to EfficientFormer pytorch checkpoint.",
+    )
+    parser.add_argument(
+        "--config_file",
+        default=None,
+        type=str,
+        required=True,
+        help="The json file for EfficientFormer model config.",
+    )
+    parser.add_argument(
+        "--pytorch_dump_path", default=None, type=str, required=True, help="Path to the output PyTorch model."
+    )
+
+    parser.add_argument("--push_to_hub", action="store_true", help="Push model and feature extractor to the hub")
+    parser.add_argument(
+        "--no-push_to_hub",
+        dest="push_to_hub",
+        action="store_false",
+        help="Do not push model and feature extractor to the hub",
+    )
+    parser.set_defaults(push_to_hub=True)
+
+    args = parser.parse_args()
+    convert_efficientformer_checkpoint(
+        checkpoint_path=args.pytorch_model_path,
+        efficientformer_config_file=args.config_file,
+        pytorch_dump_path=args.pytorch_dump_path,
+        push_to_hub=args.push_to_hub,
+    )

src/transformers/models/efficientformer/image_processing_efficientformer.py

@@ -0,0 +1,339 @@
+# coding=utf-8
+# Copyright 2022 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Image processor class for EfficientFormer."""
+
+from typing import Dict, List, Optional, Union
+
+import numpy as np
+
+from transformers.utils.generic import TensorType
+
+from ...image_processing_utils import BaseImageProcessor, BatchFeature, get_size_dict
+from ...image_transforms import (
+    center_crop,
+    get_resize_output_image_size,
+    normalize,
+    rescale,
+    resize,
+    to_channel_dimension_format,
+)
+from ...image_utils import (
+    IMAGENET_DEFAULT_MEAN,
+    IMAGENET_DEFAULT_STD,
+    ChannelDimension,
+    ImageInput,
+    PILImageResampling,
+    is_batched,
+    to_numpy_array,
+    valid_images,
+)
+from ...utils import logging
+
+
+logger = logging.get_logger(__name__)
+
+
+class EfficientFormerImageProcessor(BaseImageProcessor):
+    r"""
+    Constructs a EfficientFormer image processor.
+
+    Args:
+        do_resize (`bool`, *optional*, defaults to `True`):
+            Whether to resize the image's (height, width) dimensions to the specified `(size["height"],
+            size["width"])`. Can be overridden by the `do_resize` parameter in the `preprocess` method.
+        size (`dict`, *optional*, defaults to `{"height": 224, "width": 224}`):
+            Size of the output image after resizing. Can be overridden by the `size` parameter in the `preprocess`
+            method.
+        resample (`PILImageResampling`, *optional*, defaults to `PILImageResampling.BILINEAR`):
+            Resampling filter to use if resizing the image. Can be overridden by the `resample` parameter in the
+            `preprocess` method.
+        do_center_crop (`bool`, *optional*, defaults to `True`):
+            Whether to center crop the image to the specified `crop_size`. Can be overridden by `do_center_crop` in the
+            `preprocess` method.
+        crop_size (`Dict[str, int]` *optional*, defaults to 224):
+            Size of the output image after applying `center_crop`. Can be overridden by `crop_size` in the `preprocess`
+            method.
+        do_rescale (`bool`, *optional*, defaults to `True`):
+            Whether to rescale the image by the specified scale `rescale_factor`. Can be overridden by the `do_rescale`
+            parameter in the `preprocess` method.
+        rescale_factor (`int` or `float`, *optional*, defaults to `1/255`):
+            Scale factor to use if rescaling the image. Can be overridden by the `rescale_factor` parameter in the
+            `preprocess` method.
+        do_normalize:
+            Whether to normalize the image. Can be overridden by the `do_normalize` parameter in the `preprocess`
+            method.
+        image_mean (`float` or `List[float]`, *optional*, defaults to `IMAGENET_STANDARD_MEAN`):
+            Mean to use if normalizing the image. This is a float or list of floats the length of the number of
+            channels in the image. Can be overridden by the `image_mean` parameter in the `preprocess` method.
+        image_std (`float` or `List[float]`, *optional*, defaults to `IMAGENET_STANDARD_STD`):
+            Standard deviation to use if normalizing the image. This is a float or list of floats the length of the
+            number of channels in the image. Can be overridden by the `image_std` parameter in the `preprocess` method.
+    """
+
+    model_input_names = ["pixel_values"]
+
+    def __init__(
+        self,
+        do_resize: bool = True,
+        size: Optional[Dict[str, int]] = None,
+        resample: PILImageResampling = PILImageResampling.BICUBIC,
+        do_center_crop: bool = True,
+        do_rescale: bool = True,
+        rescale_factor: Union[int, float] = 1 / 255,
+        crop_size: Dict[str, int] = None,
+        do_normalize: bool = True,
+        image_mean: Optional[Union[float, List[float]]] = None,
+        image_std: Optional[Union[float, List[float]]] = None,
+        **kwargs
+    ) -> None:
+        super().__init__(**kwargs)
+        size = size if size is not None else {"height": 224, "width": 224}
+        size = get_size_dict(size)
+        crop_size = crop_size if crop_size is not None else {"height": 224, "width": 224}
+        crop_size = get_size_dict(crop_size, default_to_square=True, param_name="crop_size")
+
+        self.do_resize = do_resize
+        self.do_rescale = do_rescale
+        self.do_normalize = do_normalize
+        self.do_center_crop = do_center_crop
+        self.crop_size = crop_size
+        self.size = size
+        self.resample = resample
+        self.rescale_factor = rescale_factor
+        self.image_mean = image_mean if image_mean is not None else IMAGENET_DEFAULT_MEAN
+        self.image_std = image_std if image_std is not None else IMAGENET_DEFAULT_STD
+
+    def resize(
+        self,
+        image: np.ndarray,
+        size: Dict[str, int],
+        resample: PILImageResampling = PILImageResampling.BILINEAR,
+        data_format: Optional[Union[str, ChannelDimension]] = None,
+        **kwargs
+    ) -> np.ndarray:
+        """
+        Resize an image to `(size["height"], size["width"])`.
+
+        Args:
+            image (`np.ndarray`):
+                Image to resize.
+            size (`Dict[str, int]`):
+                Dictionary in the format `{"height": int, "width": int}` specifying the size of the output image.
+            resample:
+                `PILImageResampling` filter to use when resizing the image e.g. `PILImageResampling.BILINEAR`.
+            data_format (`ChannelDimension` or `str`, *optional*):
+                The channel dimension format for the output image. If unset, the channel dimension format of the input
+                image is used. Can be one of:
+                - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format.
+                - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format.
+
+        Returns:
+            `np.ndarray`: The resized image.
+        """
+        size = get_size_dict(size)
+
+        if "shortest_edge" in size:
+            size = get_resize_output_image_size(image, size=size["shortest_edge"], default_to_square=False)
+            # size = get_resize_output_image_size(image, size["shortest_edge"], size["longest_edge"])
+        elif "height" in size and "width" in size:
+            size = (size["height"], size["width"])
+        else:
+            raise ValueError(f"Size must contain 'height' and 'width' keys or 'shortest_edge' key. Got {size.keys()}")
+        return resize(image, size=size, resample=resample, data_format=data_format, **kwargs)
+
+    def center_crop(
+        self,
+        image: np.ndarray,
+        size: Dict[str, int],
+        data_format: Optional[Union[str, ChannelDimension]] = None,
+        **kwargs
+    ) -> np.ndarray:
+        """
+        Center crop an image. If the image is too small to be cropped to the size given, it will be padded (so the
+        returned result will always be of size `size`).
+
+        Args:
+            image (`np.ndarray`):
+                Image to center crop.
+            size (`Dict[str, int]`):
+                Size of the output image in the form of a dictionary with keys `height` and `width`.
+            data_format (`str` or `ChannelDimension`, *optional*):
+                The channel dimension format of the image. If not provided, it will be the same as the input image.
+        """
+        size = get_size_dict(size)
+        if "height" not in size or "width" not in size:
+            raise ValueError(f"The `size` parameter must contain the keys (height, width). Got {size.keys()}")
+        return center_crop(image, size=(size["height"], size["width"]), data_format=data_format, **kwargs)
+
+    def rescale(
+        self, image: np.ndarray, scale: float, data_format: Optional[Union[str, ChannelDimension]] = None, **kwargs
+    ) -> np.ndarray:
+        """
+        Rescale an image by a scale factor. image = image * scale.
+
+        Args:
+            image (`np.ndarray`):
+                Image to rescale.
+            scale (`float`):
+                The scaling factor to rescale pixel values by.
+            data_format (`str` or `ChannelDimension`, *optional*):
+                The channel dimension format for the output image. If unset, the channel dimension format of the input
+                image is used. Can be one of:
+                - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format.
+                - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format.
+
+        Returns:
+            `np.ndarray`: The rescaled image.
+        """
+        return rescale(image, scale=scale, data_format=data_format, **kwargs)
+
+    def normalize(
+        self,
+        image: np.ndarray,
+        mean: Union[float, List[float]],
+        std: Union[float, List[float]],
+        data_format: Optional[Union[str, ChannelDimension]] = None,
+        **kwargs
+    ) -> np.ndarray:
+        """
+        Normalize an image. image = (image - image_mean) / image_std.
+
+        Args:
+            image (`np.ndarray`):
+                Image to normalize.
+            mean (`float` or `List[float]`):
+                Image mean to use for normalization.
+            std (`float` or `List[float]`):
+                Image standard deviation to use for normalization.
+            data_format (`str` or `ChannelDimension`, *optional*):
+                The channel dimension format for the output image. If unset, the channel dimension format of the input
+                image is used. Can be one of:
+                - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format.
+                - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format.
+
+        Returns:
+            `np.ndarray`: The normalized image.
+        """
+        return normalize(image, mean=mean, std=std, data_format=data_format, **kwargs)
+
+    def preprocess(
+        self,
+        images: ImageInput,
+        do_resize: Optional[bool] = None,
+        size: Dict[str, int] = None,
+        resample: PILImageResampling = None,
+        do_center_crop: bool = None,
+        crop_size: int = None,
+        do_rescale: Optional[bool] = None,
+        rescale_factor: Optional[float] = None,
+        do_normalize: Optional[bool] = None,
+        image_mean: Optional[Union[float, List[float]]] = None,
+        image_std: Optional[Union[float, List[float]]] = None,
+        return_tensors: Optional[Union[str, TensorType]] = None,
+        data_format: Union[str, ChannelDimension] = ChannelDimension.FIRST,
+        **kwargs,
+    ) -> BatchFeature:
+        """
+        Preprocess an image or batch of images.
+
+        Args:
+            images (`ImageInput`):
+                Image to preprocess.
+            do_resize (`bool`, *optional*, defaults to `self.do_resize`):
+                Whether to resize the image.
+            size (`Dict[str, int]`, *optional*, defaults to `self.size`):
+                Dictionary in the format `{"height": h, "width": w}` specifying the size of the output image after
+                resizing.
+            resample (`PILImageResampling` filter, *optional*, defaults to `self.resample`):
+                `PILImageResampling` filter to use if resizing the image e.g. `PILImageResampling.BILINEAR`. Only has
+                an effect if `do_resize` is set to `True`.
+            do_center_crop (`bool`, *optional*, defaults to `self.do_center_crop`):
+                Whether to center crop the image.
+            do_rescale (`bool`, *optional*, defaults to `self.do_rescale`):
+                Whether to rescale the image values between [0 - 1].
+            rescale_factor (`float`, *optional*, defaults to `self.rescale_factor`):
+                Rescale factor to rescale the image by if `do_rescale` is set to `True`.
+            crop_size (`Dict[str, int]`, *optional*, defaults to `self.crop_size`):
+                Size of the center crop. Only has an effect if `do_center_crop` is set to `True`.
+            do_normalize (`bool`, *optional*, defaults to `self.do_normalize`):
+                Whether to normalize the image.
+            image_mean (`float` or `List[float]`, *optional*, defaults to `self.image_mean`):
+                Image mean to use if `do_normalize` is set to `True`.
+            image_std (`float` or `List[float]`, *optional*, defaults to `self.image_std`):
+                Image standard deviation to use if `do_normalize` is set to `True`.
+            return_tensors (`str` or `TensorType`, *optional*):
+                The type of tensors to return. Can be one of:
+                - Unset: Return a list of `np.ndarray`.
+                - `TensorType.TENSORFLOW` or `'tf'`: Return a batch of type `tf.Tensor`.
+                - `TensorType.PYTORCH` or `'pt'`: Return a batch of type `torch.Tensor`.
+                - `TensorType.NUMPY` or `'np'`: Return a batch of type `np.ndarray`.
+                - `TensorType.JAX` or `'jax'`: Return a batch of type `jax.numpy.ndarray`.
+            data_format (`ChannelDimension` or `str`, *optional*, defaults to `ChannelDimension.FIRST`):
+                The channel dimension format for the output image. Can be one of:
+                - `"channels_first"` or `ChannelDimension.FIRST`: image in (num_channels, height, width) format.
+                - `"channels_last"` or `ChannelDimension.LAST`: image in (height, width, num_channels) format.
+                - Unset: Use the channel dimension format of the input image.
+        """
+        do_resize = do_resize if do_resize is not None else self.do_resize
+        do_rescale = do_rescale if do_rescale is not None else self.do_rescale
+        do_normalize = do_normalize if do_normalize is not None else self.do_normalize
+        do_center_crop = do_center_crop if do_center_crop is not None else self.do_center_crop
+        crop_size = crop_size if crop_size is not None else self.crop_size
+        crop_size = get_size_dict(crop_size, param_name="crop_size", default_to_square=True)
+        resample = resample if resample is not None else self.resample
+        rescale_factor = rescale_factor if rescale_factor is not None else self.rescale_factor
+        image_mean = image_mean if image_mean is not None else self.image_mean
+        image_std = image_std if image_std is not None else self.image_std
+
+        size = size if size is not None else self.size
+        size_dict = get_size_dict(size)
+
+        if not is_batched(images):
+            images = [images]
+
+        if not valid_images(images):
+            raise ValueError(
+                "Invalid image type. Must be of type PIL.Image.Image, numpy.ndarray, "
+                "torch.Tensor, tf.Tensor or jax.ndarray."
+            )
+
+        if do_resize and size is None:
+            raise ValueError("Size must be specified if do_resize is True.")
+
+        if do_center_crop and crop_size is None:
+            raise ValueError("Crop size must be specified if do_center_crop is True.")
+
+        if do_rescale and rescale_factor is None:
+            raise ValueError("Rescale factor must be specified if do_rescale is True.")
+
+        # All transformations expect numpy arrays.
+        images = [to_numpy_array(image) for image in images]
+
+        if do_resize:
+            images = [self.resize(image=image, size=size_dict, resample=resample) for image in images]
+
+        if do_center_crop:
+            images = [self.center_crop(image=image, size=crop_size) for image in images]
+
+        if do_rescale:
+            images = [self.rescale(image=image, scale=rescale_factor) for image in images]
+
+        if do_normalize:
+            images = [self.normalize(image=image, mean=image_mean, std=image_std) for image in images]
+
+        images = [to_channel_dimension_format(image, data_format) for image in images]
+
+        data = {"pixel_values": images}
+        return BatchFeature(data=data, tensor_type=return_tensors)

src/transformers/models/efficientformer/modeling_efficientformer.py

@@ -0,0 +1,795 @@
+# coding=utf-8
+# Copyright 2022 Snapchat Research and The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" PyTorch EfficientFormer model."""
+
+import itertools
+from dataclasses import dataclass
+from typing import Optional, Tuple, Union
+
+import torch
+import torch.utils.checkpoint
+from torch import nn
+from torch.nn import BCEWithLogitsLoss, CrossEntropyLoss, MSELoss
+
+from ...activations import ACT2FN
+from ...modeling_outputs import BaseModelOutput, BaseModelOutputWithPooling, ImageClassifierOutput
+from ...modeling_utils import PreTrainedModel
+from ...utils import (
+    ModelOutput,
+    add_code_sample_docstrings,
+    add_start_docstrings,
+    add_start_docstrings_to_model_forward,
+    logging,
+)
+from .configuration_efficientformer import EfficientFormerConfig
+
+
+logger = logging.get_logger(__name__)
+
+# General docstring
+_CONFIG_FOR_DOC = "EfficientFormerConfig"
+_FEAT_EXTRACTOR_FOR_DOC = "EfficientFormerImageProcessor"
+
+# Base docstring
+_CHECKPOINT_FOR_DOC = "efficientformer-l1-300"
+_EXPECTED_OUTPUT_SHAPE = [1, 197, 768]
+
+# Image classification docstring
+_IMAGE_CLASS_CHECKPOINT = "snap-research/efficientformer-l1-300"
+_IMAGE_CLASS_EXPECTED_OUTPUT = "Egyptian cat"
+
+
+EFFICIENTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST = [
+    "huggingface/efficientformer-l1-300",
+    # See all EfficientFormer models at https://huggingface.co/models?filter=efficientformer
+]
+
+
+class EfficientFormerPatchEmbeddings(nn.Module):
+    """
+    This class performs downsampling between two stages. For the input tensor with the shape [batch_size, num_channels,
+    height, width] it produces output tensor with the shape [batch_size, num_channels, height/stride, width/stride]
+    """
+
+    def __init__(self, config: EfficientFormerConfig, num_channels: int, embed_dim: int, apply_norm: bool = True):
+        super().__init__()
+        self.num_channels = num_channels
+
+        self.projection = nn.Conv2d(
+            num_channels,
+            embed_dim,
+            kernel_size=config.downsample_patch_size,
+            stride=config.downsample_stride,
+            padding=config.downsample_pad,
+        )
+        self.norm = nn.BatchNorm2d(embed_dim) if apply_norm else nn.Identity()
+
+    def forward(self, pixel_values: torch.Tensor) -> torch.Tensor:
+        batch_size, num_channels, height, width = pixel_values.shape
+        if num_channels != self.num_channels:
+            raise ValueError(
+                "Make sure that the channel dimension of the pixel values match with the one set in the configuration."
+            )
+
+        embeddings = self.projection(pixel_values)
+        embeddings = self.norm(embeddings)
+
+        return embeddings
+
+
+class EfficientFormerSelfAttention(nn.Module):
+    def __init__(self, dim: int, key_dim: int, num_heads: int, attention_ratio: int, resolution: int):
+        super().__init__()
+
+        self.num_heads = num_heads
+        self.key_dim = key_dim
+        self.attention_ratio = attention_ratio
+        self.scale = key_dim**-0.5
+        self.total_key_dim = key_dim * num_heads
+        self.expanded_key_dim = int(attention_ratio * key_dim)
+        self.total_expanded_key_dim = int(self.expanded_key_dim * num_heads)
+        hidden_size = self.total_expanded_key_dim + self.total_key_dim * 2
+        self.qkv = nn.Linear(dim, hidden_size)
+        self.projection = nn.Linear(self.total_expanded_key_dim, dim)
+        points = list(itertools.product(range(resolution), range(resolution)))
+        num_points = len(points)
+        attention_offsets = {}
+        idxs = []
+        for point_1 in points:
+            for point_2 in points:
+                offset = (abs(point_1[0] - point_2[0]), abs(point_1[1] - point_2[1]))
+                if offset not in attention_offsets:
+                    attention_offsets[offset] = len(attention_offsets)
+                idxs.append(attention_offsets[offset])
+        self.attention_biases = torch.nn.Parameter(torch.zeros(num_heads, len(attention_offsets)))
+        self.register_buffer("attention_bias_idxs", torch.LongTensor(idxs).view(num_points, num_points))
+
+    @torch.no_grad()
+    def train(self, mode=True):
+        super().train(mode)
+        if mode and hasattr(self, "ab"):
+            del self.ab
+        else:
+            self.ab = self.attention_biases[:, self.attention_bias_idxs]
+
+    def forward(self, hidden_states: torch.Tensor, output_attentions: bool = False) -> Tuple[torch.Tensor]:
+        batch_size, sequence_length, num_channels = hidden_states.shape
+        qkv = self.qkv(hidden_states)
+        query_layer, key_layer, value_layer = qkv.reshape(batch_size, sequence_length, self.num_heads, -1).split(
+            [self.key_dim, self.key_dim, self.expanded_key_dim], dim=3
+        )
+        query_layer = query_layer.permute(0, 2, 1, 3)
+        key_layer = key_layer.permute(0, 2, 1, 3)
+        value_layer = value_layer.permute(0, 2, 1, 3)
+
+        attention_probs = (torch.matmul(query_layer, key_layer.transpose(-2, -1))) * self.scale + (
+            self.attention_biases[:, self.attention_bias_idxs] if self.training else self.ab
+        )
+
+        attention_probs = attention_probs.softmax(dim=-1)
+
+        context_layer = torch.matmul(attention_probs, value_layer).transpose(1, 2)
+        context_layer = context_layer.reshape(batch_size, sequence_length, self.total_expanded_key_dim)
+        context_layer = self.projection(context_layer)
+
+        outputs = (context_layer, attention_probs) if output_attentions else (context_layer,)
+
+        return outputs
+
+
+class EfficientFormerConvStem(nn.Module):
+    def __init__(self, config: EfficientFormerConfig, out_channels: int):
+        super().__init__()
+
+        self.convolution1 = nn.Conv2d(config.num_channels, out_channels // 2, kernel_size=3, stride=2, padding=1)
+        self.batchnorm_before = nn.BatchNorm2d(out_channels // 2)
+
+        self.convolution2 = nn.Conv2d(out_channels // 2, out_channels, kernel_size=3, stride=2, padding=1)
+        self.batchnorm_after = nn.BatchNorm2d(out_channels)
+
+        self.activation = nn.ReLU()
+
+    def forward(self, pixel_values: torch.Tensor) -> torch.Tensor:
+        features = self.batchnorm_before(self.convolution1(pixel_values))
+        features = self.activation(features)
+        features = self.batchnorm_after(self.convolution2(features))
+        features = self.activation(features)
+
+        return features
+
+
+class EfficientFormerPooling(nn.Module):
+    def __init__(self, pool_size: int):
+        super().__init__()
+        self.pool = nn.AvgPool2d(pool_size, stride=1, padding=pool_size // 2, count_include_pad=False)
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        output = self.pool(hidden_states) - hidden_states
+        return output
+
+
+class EfficientFormerDenseMlp(nn.Module):
+    def __init__(
+        self,
+        config: EfficientFormerConfig,
+        in_features: int,
+        hidden_features: Optional[int] = None,
+        out_features: Optional[int] = None,
+    ):
+        super().__init__()
+        out_features = out_features or in_features
+        hidden_features = hidden_features or in_features
+
+        self.linear_in = nn.Linear(in_features, hidden_features)
+        self.activation = ACT2FN[config.hidden_act]
+        self.dropout = nn.Dropout(config.hidden_dropout_prob)
+        self.linear_out = nn.Linear(hidden_features, out_features)
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        hidden_states = self.linear_in(hidden_states)
+        hidden_states = self.activation(hidden_states)
+        hidden_states = self.dropout(hidden_states)
+        hidden_states = self.linear_out(hidden_states)
+        hidden_states = self.dropout(hidden_states)
+
+        return hidden_states
+
+
+class EfficientFormerConvMlp(nn.Module):
+    def __init__(
+        self,
+        config: EfficientFormerConfig,
+        in_features: int,
+        hidden_features: Optional[int] = None,
+        out_features: Optional[int] = None,
+        drop: float = 0.0,
+    ):
+        super().__init__()
+        out_features = out_features or in_features
+        hidden_features = hidden_features or in_features
+
+        self.convolution1 = nn.Conv2d(in_features, hidden_features, 1)
+        self.actvation = ACT2FN[config.hidden_act]
+        self.convolution2 = nn.Conv2d(hidden_features, out_features, 1)
+        self.dropout = nn.Dropout(drop)
+
+        self.batchnorm_before = nn.BatchNorm2d(hidden_features)
+        self.batchnorm_after = nn.BatchNorm2d(out_features)
+
+    def forward(self, hidden_state: torch.Tensor) -> torch.Tensor:
+        hidden_state = self.convolution1(hidden_state)
+        hidden_state = self.batchnorm_before(hidden_state)
+
+        hidden_state = self.actvation(hidden_state)
+        hidden_state = self.dropout(hidden_state)
+        hidden_state = self.convolution2(hidden_state)
+
+        hidden_state = self.batchnorm_after(hidden_state)
+
+        hidden_state = self.dropout(hidden_state)
+        return hidden_state
+
+
+# Copied from transformers.models.convnext.modeling_convnext.drop_path
+def drop_path(input, drop_prob: float = 0.0, training: bool = False):
+    """
+    Drop paths (Stochastic Depth) per sample (when applied in main path of residual blocks).
+
+    Comment by Ross Wightman: This is the same as the DropConnect impl I created for EfficientNet, etc networks,
+    however, the original name is misleading as 'Drop Connect' is a different form of dropout in a separate paper...
+    See discussion: https://github.com/tensorflow/tpu/issues/494#issuecomment-532968956 ... I've opted for changing the
+    layer and argument names to 'drop path' rather than mix DropConnect as a layer name and use 'survival rate' as the
+    argument.
+    """
+    if drop_prob == 0.0 or not training:
+        return input
+    keep_prob = 1 - drop_prob
+    shape = (input.shape[0],) + (1,) * (input.ndim - 1)  # work with diff dim tensors, not just 2D ConvNets
+    random_tensor = keep_prob + torch.rand(shape, dtype=input.dtype, device=input.device)
+    random_tensor.floor_()  # binarize
+    output = input.div(keep_prob) * random_tensor
+    return output
+
+
+# Copied from transformers.models.beit.modeling_beit.BeitDropPath with Beit->Bit
+class EfficientFormerDropPath(nn.Module):
+    """Drop paths (Stochastic Depth) per sample (when applied in main path of residual blocks)."""
+
+    def __init__(self, drop_prob: Optional[float] = None) -> None:
+        super().__init__()
+        self.drop_prob = drop_prob
+
+    def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
+        return drop_path(hidden_states, self.drop_prob, self.training)
+
+    def extra_repr(self) -> str:
+        return "p={}".format(self.drop_prob)
+
+
+class EfficientFormerFlat(nn.Module):
+    def __init__(self):
+        super().__init__()
+
+    def forward(self, hidden_states: torch.Tensor) -> Tuple[torch.Tensor]:
+        hidden_states = hidden_states.flatten(2).transpose(1, 2)
+        return hidden_states
+
+
+class EfficientFormerMeta3D(nn.Module):
+    def __init__(self, config: EfficientFormerConfig, dim: int, drop_path: float = 0.0):
+        super().__init__()
+
+        self.token_mixer = EfficientFormerSelfAttention(
+            dim=config.dim,
+            key_dim=config.key_dim,
+            num_heads=config.num_attention_heads,
+            attention_ratio=config.attention_ratio,
+            resolution=config.resolution,
+        )
+        self.layernorm1 = nn.LayerNorm(dim)
+        self.layernorm2 = nn.LayerNorm(dim)
+        mlp_hidden_dim = int(dim * config.mlp_expansion_ratio)
+        self.mlp = EfficientFormerDenseMlp(config, in_features=dim, hidden_features=mlp_hidden_dim)
+
+        self.drop_path = EfficientFormerDropPath(drop_path) if drop_path > 0.0 else nn.Identity()
+        self.use_layer_scale = config.use_layer_scale
+        if config.use_layer_scale:
+            self.layer_scale_1 = nn.Parameter(config.layer_scale_init_value * torch.ones((dim)), requires_grad=True)
+            self.layer_scale_2 = nn.Parameter(config.layer_scale_init_value * torch.ones((dim)), requires_grad=True)
+
+    def forward(self, hidden_states: torch.Tensor, output_attentions: bool = False) -> Tuple[torch.Tensor]:
+        self_attention_outputs = self.token_mixer(self.layernorm1(hidden_states), output_attentions)
+        attention_output = self_attention_outputs[0]
+        outputs = self_attention_outputs[1:]  # add self attentions if we output attention weights
+
+        if self.use_layer_scale:
+            layer_output = hidden_states + self.drop_path(
+                self.layer_scale_1.unsqueeze(0).unsqueeze(0) * attention_output
+            )
+            layer_output = layer_output + self.drop_path(
+                self.layer_scale_2.unsqueeze(0).unsqueeze(0) * self.mlp(self.layernorm2(layer_output))
+            )
+        else:
+            layer_output = hidden_states + self.drop_path(attention_output)
+            layer_output = layer_output + self.drop_path(self.mlp(self.layernorm2(layer_output)))
+
+        outputs = (layer_output,) + outputs
+
+        return outputs
+
+
+class EfficientFormerMeta3DLayers(nn.Module):
+    def __init__(self, config: EfficientFormerConfig):
+        super().__init__()
+        drop_paths = [
+            config.drop_path_rate * (block_idx + sum(config.depths[:-1]))
+            for block_idx in range(config.num_meta3d_blocks)
+        ]
+        self.blocks = nn.ModuleList(
+            [EfficientFormerMeta3D(config, config.hidden_sizes[-1], drop_path=drop_path) for drop_path in drop_paths]
+        )
+
+    def forward(self, hidden_states: torch.Tensor, output_attentions: bool = False) -> Tuple[torch.Tensor]:
+        all_attention_outputs = () if output_attentions else None
+        for layer_module in self.blocks:
+            if isinstance(hidden_states, tuple):
+                hidden_states = hidden_states[0]
+            hidden_states = layer_module(hidden_states, output_attentions)
+            if output_attentions:
+                all_attention_outputs = all_attention_outputs + (hidden_states[1],)
+        if output_attentions:
+            outputs = (hidden_states[0],) + all_attention_outputs
+            return outputs
+        return hidden_states
+
+
+class EfficientFormerMeta4D(nn.Module):
+    def __init__(self, config: EfficientFormerConfig, dim: int, drop_path: float = 0.0):
+        super().__init__()
+        pool_size = config.pool_size if config.pool_size is not None else 3
+        self.token_mixer = EfficientFormerPooling(pool_size=pool_size)
+        mlp_hidden_dim = int(dim * config.mlp_expansion_ratio)
+        self.mlp = EfficientFormerConvMlp(
+            config, in_features=dim, hidden_features=mlp_hidden_dim, drop=config.hidden_dropout_prob
+        )
+
+        self.drop_path = EfficientFormerDropPath(drop_path) if drop_path > 0.0 else nn.Identity()
+        self.use_layer_scale = config.use_layer_scale
+        if config.use_layer_scale:
+            self.layer_scale_1 = nn.Parameter(config.layer_scale_init_value * torch.ones((dim)), requires_grad=True)
+            self.layer_scale_2 = nn.Parameter(config.layer_scale_init_value * torch.ones((dim)), requires_grad=True)
+
+    def forward(self, hidden_states: torch.Tensor) -> Tuple[torch.Tensor]:
+        outputs = self.token_mixer(hidden_states)
+
+        if self.use_layer_scale:
+            layer_output = hidden_states + self.drop_path(self.layer_scale_1.unsqueeze(-1).unsqueeze(-1) * outputs)
+            layer_output = layer_output + self.drop_path(
+                self.layer_scale_2.unsqueeze(-1).unsqueeze(-1) * self.mlp(layer_output)
+            )
+        else:
+            layer_output = hidden_states + self.drop_path(outputs)
+            layer_output = layer_output + self.drop_path(self.mlp(layer_output))
+
+        return layer_output
+
+
+class EfficientFormerMeta4DLayers(nn.Module):
+    def __init__(self, config: EfficientFormerConfig, stage_idx: int):
+        super().__init__()
+        num_layers = (
+            config.depths[stage_idx] if stage_idx != -1 else config.depths[stage_idx] - config.num_meta3d_blocks
+        )
+        drop_paths = [
+            config.drop_path_rate * (block_idx + sum(config.depths[:stage_idx])) for block_idx in range(num_layers)
+        ]
+        self.blocks = nn.ModuleList(
+            [
+                EfficientFormerMeta4D(config, config.hidden_sizes[stage_idx], drop_path=drop_path)
+                for drop_path in drop_paths
+            ]
+        )
+
+    def forward(self, hidden_states: torch.Tensor) -> Tuple[torch.Tensor]:
+        for layer_module in self.blocks:
+            hidden_states = layer_module(hidden_states)
+        return hidden_states
+
+
+class EfficientFormerIntermediateStage(nn.Module):
+    def __init__(self, config: EfficientFormerConfig, index: int):
+        super().__init__()
+        self.meta4D_layers = EfficientFormerMeta4DLayers(config, index)
+
+    def forward(self, hidden_states: torch.Tensor) -> Tuple[torch.Tensor]:
+        hidden_states = self.meta4D_layers(hidden_states)
+        return hidden_states
+
+
+class EfficientFormerLastStage(nn.Module):
+    def __init__(self, config: EfficientFormerConfig):
+        super().__init__()
+        self.meta4D_layers = EfficientFormerMeta4DLayers(config, -1)
+        self.flat = EfficientFormerFlat()
+        self.meta3D_layers = EfficientFormerMeta3DLayers(config)
+
+    def forward(self, hidden_states: torch.Tensor, output_attentions: bool = False) -> Tuple[torch.Tensor]:
+        hidden_states = self.meta4D_layers(hidden_states)
+        hidden_states = self.flat(hidden_states)
+        hidden_states = self.meta3D_layers(hidden_states, output_attentions)
+
+        return hidden_states
+
+
+class EfficientFormerEncoder(nn.Module):
+    def __init__(self, config: EfficientFormerConfig):
+        super().__init__()
+        self.config = config
+        num_intermediate_stages = len(config.depths) - 1
+        downsamples = [
+            config.downsamples[i] or config.hidden_sizes[i] != config.hidden_sizes[i + 1]
+            for i in range(num_intermediate_stages)
+        ]
+        intermediate_stages = []
+        for i in range(num_intermediate_stages):
+            intermediate_stages.append(EfficientFormerIntermediateStage(config, i))
+            if downsamples[i]:
+                intermediate_stages.append(
+                    EfficientFormerPatchEmbeddings(config, config.hidden_sizes[i], config.hidden_sizes[i + 1])
+                )
+
+        self.intermediate_stages = nn.ModuleList(intermediate_stages)
+        self.last_stage = EfficientFormerLastStage(config)
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        output_hidden_states: bool = False,
+        output_attentions: bool = False,
+        return_dict: bool = True,
+    ) -> BaseModelOutput:
+        all_hidden_states = () if output_hidden_states else None
+        all_self_attentions = () if output_attentions else None
+
+        if output_hidden_states:
+            all_hidden_states = all_hidden_states + (hidden_states,)
+
+        for layer_module in self.intermediate_stages:
+            hidden_states = layer_module(hidden_states)
+            if output_hidden_states:
+                all_hidden_states = all_hidden_states + (hidden_states,)
+
+        layer_output = self.last_stage(hidden_states, output_attentions=output_attentions)
+        if output_attentions:
+            all_self_attentions = all_self_attentions + layer_output[1:]
+
+        if output_hidden_states:
+            all_hidden_states = all_hidden_states + (layer_output[0],)
+
+        if not return_dict:
+            return tuple(v for v in [hidden_states, all_hidden_states, all_self_attentions] if v is not None)
+
+        return BaseModelOutput(
+            last_hidden_state=layer_output[0],
+            hidden_states=all_hidden_states,
+            attentions=all_self_attentions,
+        )
+
+
+class EfficientFormerPreTrainedModel(PreTrainedModel):
+    """
+    An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained
+    models.
+    """
+
+    config_class = EfficientFormerConfig
+    base_model_prefix = "efficientformer"
+    main_input_name = "pixel_values"
+    supports_gradient_checkpointing = False
+
+    def _init_weights(self, module: nn.Module):
+        """Initialize the weights"""
+        if isinstance(module, (nn.Linear, nn.Conv2d)):
+            module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
+            if module.bias is not None:
+                module.bias.data.zero_()
+        elif isinstance(module, nn.LayerNorm):
+            module.bias.data.zero_()
+            module.weight.data.fill_(1.0)
+
+
+EFFICIENTFORMER_START_DOCSTRING = r"""
+    This model is a PyTorch [nn.Module](https://pytorch.org/docs/stable/nn.html#nn.Module) subclass. Use it as a
+    regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage and behavior.
+
+    Parameters:
+        config ([`EfficientFormerConfig`]): Model configuration class with all the parameters of the model.
+            Initializing with a config file does not load the weights associated with the model, only the
+            configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights.
+"""
+
+EFFICIENTFORMER_INPUTS_DOCSTRING = r"""
+    Args:
+        pixel_values (`torch.FloatTensor` of shape `(batch_size, num_channels, height, width)`):
+            Pixel values. Pixel values can be obtained using [`ViTFeatureExtractor`]. See
+            [`ViTFeatureExtractor.__call__`] for details.
+        output_attentions (`bool`, *optional*):
+            Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
+            tensors for more detail.
+        output_hidden_states (`bool`, *optional*):
+            Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
+            more detail.
+        return_dict (`bool`, *optional*):
+            Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
+"""
+
+
+@add_start_docstrings(
+    "The bare EfficientFormer Model transformer outputting raw hidden-states without any specific head on top.",
+    EFFICIENTFORMER_START_DOCSTRING,
+)
+class EfficientFormerModel(EfficientFormerPreTrainedModel):
+    def __init__(self, config: EfficientFormerConfig):
+        super().__init__(config)
+        self.config = config
+
+        self.patch_embed = EfficientFormerConvStem(config, config.hidden_sizes[0])
+        self.encoder = EfficientFormerEncoder(config)
+        self.layernorm = nn.LayerNorm(config.hidden_sizes[-1], eps=config.layer_norm_eps)
+
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    @add_start_docstrings_to_model_forward(EFFICIENTFORMER_INPUTS_DOCSTRING)
+    @add_code_sample_docstrings(
+        processor_class=_FEAT_EXTRACTOR_FOR_DOC,
+        checkpoint=_CHECKPOINT_FOR_DOC,
+        output_type=BaseModelOutputWithPooling,
+        config_class=_CONFIG_FOR_DOC,
+        modality="vision",
+        expected_output=_EXPECTED_OUTPUT_SHAPE,
+    )
+    def forward(
+        self,
+        pixel_values: Optional[torch.Tensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[tuple, BaseModelOutput]:
+        output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
+        output_hidden_states = (
+            output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
+        )
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        if pixel_values is None:
+            raise ValueError("You have to specify pixel_values")
+
+        embedding_output = self.patch_embed(pixel_values)
+        encoder_outputs = self.encoder(
+            embedding_output, output_attentions=output_attentions, output_hidden_states=output_hidden_states
+        )
+
+        sequence_output = encoder_outputs[0]
+        sequence_output = self.layernorm(sequence_output)
+
+        if not return_dict:
+            head_outputs = (sequence_output,)
+            return head_outputs + encoder_outputs[1:]
+
+        return BaseModelOutput(
+            last_hidden_state=sequence_output,
+            hidden_states=encoder_outputs.hidden_states,
+            attentions=encoder_outputs.attentions,
+        )
+
+
+@add_start_docstrings(
+    """
+    EfficientFormer Model transformer with an image classification head on top (a linear layer on top of the final
+    hidden state of the [CLS] token) e.g. for ImageNet.
+    """,
+    EFFICIENTFORMER_START_DOCSTRING,
+)
+class EfficientFormerForImageClassification(EfficientFormerPreTrainedModel):
+    def __init__(self, config: EfficientFormerConfig):
+        super().__init__(config)
+
+        self.num_labels = config.num_labels
+        self.efficientformer = EfficientFormerModel(config)
+
+        # Classifier head
+        self.classifier = (
+            nn.Linear(config.hidden_sizes[-1], config.num_labels) if config.num_labels > 0 else nn.Identity()
+        )
+
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    @add_start_docstrings_to_model_forward(EFFICIENTFORMER_INPUTS_DOCSTRING)
+    @add_code_sample_docstrings(
+        processor_class=_FEAT_EXTRACTOR_FOR_DOC,
+        checkpoint=_IMAGE_CLASS_CHECKPOINT,
+        output_type=ImageClassifierOutput,
+        config_class=_CONFIG_FOR_DOC,
+        expected_output=_IMAGE_CLASS_EXPECTED_OUTPUT,
+    )
+    def forward(
+        self,
+        pixel_values: Optional[torch.Tensor] = None,
+        labels: Optional[torch.Tensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[tuple, ImageClassifierOutput]:
+        r"""
+        labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
+            Labels for computing the image classification/regression loss. Indices should be in `[0, ...,
+            config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
+            `config.num_labels > 1` a classification loss is computed (Cross-Entropy).
+        """
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        outputs = self.efficientformer(
+            pixel_values,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+        )
+
+        sequence_output = outputs[0]
+
+        logits = self.classifier(sequence_output.mean(-2))
+
+        loss = None
+        if labels is not None:
+            if self.config.problem_type is None:
+                if self.num_labels == 1:
+                    self.config.problem_type = "regression"
+                elif self.num_labels > 1 and (labels.dtype == torch.long or labels.dtype == torch.int):
+                    self.config.problem_type = "single_label_classification"
+                else:
+                    self.config.problem_type = "multi_label_classification"
+
+            if self.config.problem_type == "regression":
+                loss_fct = MSELoss()
+                if self.num_labels == 1:
+                    loss = loss_fct(logits.squeeze(), labels.squeeze())
+                else:
+                    loss = loss_fct(logits, labels)
+            elif self.config.problem_type == "single_label_classification":
+                loss_fct = CrossEntropyLoss()
+                loss = loss_fct(logits.view(-1, self.num_labels), labels.view(-1))
+            elif self.config.problem_type == "multi_label_classification":
+                loss_fct = BCEWithLogitsLoss()
+                loss = loss_fct(logits, labels)
+
+        if not return_dict:
+            output = (logits,) + outputs[1:]
+            return ((loss,) + output) if loss is not None else output
+
+        return ImageClassifierOutput(
+            loss=loss,
+            logits=logits,
+            hidden_states=outputs.hidden_states,
+            attentions=outputs.attentions,
+        )
+
+
+@dataclass
+class EfficientFormerForImageClassificationWithTeacherOutput(ModelOutput):
+    """
+    Output type of [`EfficientFormerForImageClassificationWithTeacher`].
+
+    Args:
+        logits (`torch.FloatTensor` of shape `(batch_size, config.num_labels)`):
+            Prediction scores as the average of the cls_logits and distillation logits.
+        cls_logits (`torch.FloatTensor` of shape `(batch_size, config.num_labels)`):
+            Prediction scores of the classification head (i.e. the linear layer on top of the final hidden state of the
+            class token).
+        distillation_logits (`torch.FloatTensor` of shape `(batch_size, config.num_labels)`):
+            Prediction scores of the distillation head (i.e. the linear layer on top of the final hidden state of the
+            distillation token).
+        hidden_states (`tuple(torch.FloatTensor)`, *optional*, returned when `output_hidden_states=True` is passed or when `config.output_hidden_states=True`):
+            Tuple of `torch.FloatTensor` (one for the output of the embeddings + one for the output of each layer) of
+            shape `(batch_size, sequence_length, hidden_size)`. Hidden-states of the model at the output of each layer
+            plus the initial embedding outputs.
+        attentions (`tuple(torch.FloatTensor)`, *optional*, returned when `output_attentions=True` is passed or when `config.output_attentions=True`):
+            Tuple of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length,
+            sequence_length)`. Attentions weights after the attention softmax, used to compute the weighted average in
+            the self-attention heads.
+    """
+
+    logits: torch.FloatTensor = None
+    cls_logits: torch.FloatTensor = None
+    distillation_logits: torch.FloatTensor = None
+    hidden_states: Optional[Tuple[torch.FloatTensor]] = None
+    attentions: Optional[Tuple[torch.FloatTensor]] = None
+
+
+@add_start_docstrings(
+    """
+    EfficientFormer Model transformer with image classification heads on top (a linear layer on top of the final hidden
+    state of the [CLS] token and a linear layer on top of the final hidden state of the distillation token) e.g. for
+    ImageNet.
+
+    <Tip warning={true}>
+
+           This model supports inference-only. Fine-tuning with distillation (i.e. with a teacher) is not yet
+           supported.
+
+    </Tip>
+    """,
+    EFFICIENTFORMER_START_DOCSTRING,
+)
+class EfficientFormerForImageClassificationWithTeacher(EfficientFormerPreTrainedModel):
+    def __init__(self, config: EfficientFormerConfig):
+        super().__init__(config)
+
+        self.num_labels = config.num_labels
+        self.efficientformer = EfficientFormerModel(config)
+
+        # Classifier head
+        self.classifier = nn.Linear(config.hidden_size, config.num_labels) if config.num_labels > 0 else nn.Identity()
+        # Distillation head
+        self.distillation_classifier = (
+            nn.Linear(config.hidden_size, config.num_labels) if config.num_labels > 0 else nn.Identity()
+        )
+
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    @add_start_docstrings_to_model_forward(EFFICIENTFORMER_INPUTS_DOCSTRING)
+    @add_code_sample_docstrings(
+        processor_class=_FEAT_EXTRACTOR_FOR_DOC,
+        checkpoint=_IMAGE_CLASS_CHECKPOINT,
+        output_type=EfficientFormerForImageClassificationWithTeacherOutput,
+        config_class=_CONFIG_FOR_DOC,
+        expected_output=_IMAGE_CLASS_EXPECTED_OUTPUT,
+    )
+    def forward(
+        self,
+        pixel_values: Optional[torch.Tensor] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+    ) -> Union[tuple, EfficientFormerForImageClassificationWithTeacherOutput]:
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+        outputs = self.efficientformer(
+            pixel_values,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+        )
+
+        sequence_output = outputs[0]
+
+        cls_logits = self.classifier(sequence_output.mean(-2))
+        distillation_logits = self.distillation_classifier(sequence_output.mean(-2))
+
+        # during inference, return the average of both classifier predictions
+        logits = (cls_logits + distillation_logits) / 2
+
+        if not return_dict:
+            output = (logits, cls_logits, distillation_logits) + outputs[1:]
+            return output
+
+        return EfficientFormerForImageClassificationWithTeacherOutput(
+            logits=logits,
+            cls_logits=cls_logits,
+            distillation_logits=distillation_logits,
+            hidden_states=outputs.hidden_states,
+            attentions=outputs.attentions,
+        )

src/transformers/utils/dummy_pt_objects.py

@@ -2149,6 +2149,37 @@ class DPTPreTrainedModel(metaclass=DummyObject):
         requires_backends(self, ["torch"])
 
 
+EFFICIENTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST = None
+
+
+class EfficientFormerForImageClassification(metaclass=DummyObject):
+    _backends = ["torch"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["torch"])
+
+
+class EfficientFormerForImageClassificationWithTeacher(metaclass=DummyObject):
+    _backends = ["torch"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["torch"])
+
+
+class EfficientFormerModel(metaclass=DummyObject):
+    _backends = ["torch"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["torch"])
+
+
+class EfficientFormerPreTrainedModel(metaclass=DummyObject):
+    _backends = ["torch"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["torch"])
+
+
 ELECTRA_PRETRAINED_MODEL_ARCHIVE_LIST = None
 
 

src/transformers/utils/dummy_vision_objects.py

@@ -171,6 +171,13 @@ class DPTImageProcessor(metaclass=DummyObject):
         requires_backends(self, ["vision"])
 
 
+class EfficientFormerImageProcessor(metaclass=DummyObject):
+    _backends = ["vision"]
+
+    def __init__(self, *args, **kwargs):
+        requires_backends(self, ["vision"])
+
+
 class FlavaFeatureExtractor(metaclass=DummyObject):
     _backends = ["vision"]
 

tests/models/efficientformer/test_image_processing_efficientformer.py

@@ -0,0 +1,192 @@
+# coding=utf-8
+# Copyright 2021 HuggingFace Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+import unittest
+
+import numpy as np
+
+from transformers.testing_utils import require_torch, require_vision
+from transformers.utils import is_torch_available, is_vision_available
+
+from ...test_feature_extraction_common import FeatureExtractionSavingTestMixin, prepare_image_inputs
+
+
+if is_torch_available():
+    import torch
+
+if is_vision_available():
+    from PIL import Image
+
+    from transformers import ViTFeatureExtractor
+
+
+class EfficientFormerImageProcessorTester(unittest.TestCase):
+    def __init__(
+        self,
+        parent,
+        batch_size=13,
+        num_channels=3,
+        image_size=224,
+        min_resolution=30,
+        max_resolution=400,
+        do_resize=True,
+        size=None,
+        do_normalize=True,
+        image_mean=[0.5, 0.5, 0.5],
+        image_std=[0.5, 0.5, 0.5],
+    ):
+        size = size if size is not None else {"height": 18, "width": 18}
+        self.parent = parent
+        self.batch_size = batch_size
+        self.num_channels = num_channels
+        self.image_size = image_size
+        self.min_resolution = min_resolution
+        self.max_resolution = max_resolution
+        self.do_resize = do_resize
+        self.size = size
+        self.do_normalize = do_normalize
+        self.image_mean = image_mean
+        self.image_std = image_std
+
+    def prepare_feat_extract_dict(self):
+        return {
+            "image_mean": self.image_mean,
+            "image_std": self.image_std,
+            "do_normalize": self.do_normalize,
+            "do_resize": self.do_resize,
+            "size": self.size,
+        }
+
+
+@require_torch
+@require_vision
+class EfficientFormerImageProcessorTest(FeatureExtractionSavingTestMixin, unittest.TestCase):
+
+    feature_extraction_class = ViTFeatureExtractor if is_vision_available() else None
+
+    def setUp(self):
+        self.feature_extract_tester = EfficientFormerImageProcessorTester(self)
+
+    @property
+    def feat_extract_dict(self):
+        return self.feature_extract_tester.prepare_feat_extract_dict()
+
+    def test_feat_extract_properties(self):
+        feature_extractor = self.feature_extraction_class(**self.feat_extract_dict)
+        self.assertTrue(hasattr(feature_extractor, "image_mean"))
+        self.assertTrue(hasattr(feature_extractor, "image_std"))
+        self.assertTrue(hasattr(feature_extractor, "do_normalize"))
+        self.assertTrue(hasattr(feature_extractor, "do_resize"))
+        self.assertTrue(hasattr(feature_extractor, "size"))
+
+    def test_batch_feature(self):
+        pass
+
+    def test_call_pil(self):
+        # Initialize feature_extractor
+        feature_extractor = self.feature_extraction_class(**self.feat_extract_dict)
+        # create random PIL images
+        image_inputs = prepare_image_inputs(self.feature_extract_tester, equal_resolution=False)
+        for image in image_inputs:
+            self.assertIsInstance(image, Image.Image)
+
+        # Test not batched input
+        encoded_images = feature_extractor(image_inputs[0], return_tensors="pt").pixel_values
+        self.assertEqual(
+            encoded_images.shape,
+            (
+                1,
+                self.feature_extract_tester.num_channels,
+                self.feature_extract_tester.size["height"],
+                self.feature_extract_tester.size["width"],
+            ),
+        )
+
+        # Test batched
+        encoded_images = feature_extractor(image_inputs, return_tensors="pt").pixel_values
+        self.assertEqual(
+            encoded_images.shape,
+            (
+                self.feature_extract_tester.batch_size,
+                self.feature_extract_tester.num_channels,
+                self.feature_extract_tester.size["height"],
+                self.feature_extract_tester.size["width"],
+            ),
+        )
+
+    def test_call_numpy(self):
+        # Initialize feature_extractor
+        feature_extractor = self.feature_extraction_class(**self.feat_extract_dict)
+        # create random numpy tensors
+        image_inputs = prepare_image_inputs(self.feature_extract_tester, equal_resolution=False, numpify=True)
+        for image in image_inputs:
+            self.assertIsInstance(image, np.ndarray)
+
+        # Test not batched input
+        encoded_images = feature_extractor(image_inputs[0], return_tensors="pt").pixel_values
+        self.assertEqual(
+            encoded_images.shape,
+            (
+                1,
+                self.feature_extract_tester.num_channels,
+                self.feature_extract_tester.size["height"],
+                self.feature_extract_tester.size["width"],
+            ),
+        )
+
+        # Test batched
+        encoded_images = feature_extractor(image_inputs, return_tensors="pt").pixel_values
+        self.assertEqual(
+            encoded_images.shape,
+            (
+                self.feature_extract_tester.batch_size,
+                self.feature_extract_tester.num_channels,
+                self.feature_extract_tester.size["height"],
+                self.feature_extract_tester.size["width"],
+            ),
+        )
+
+    def test_call_pytorch(self):
+        # Initialize feature_extractor
+        feature_extractor = self.feature_extraction_class(**self.feat_extract_dict)
+        # create random PyTorch tensors
+        image_inputs = prepare_image_inputs(self.feature_extract_tester, equal_resolution=False, torchify=True)
+        for image in image_inputs:
+            self.assertIsInstance(image, torch.Tensor)
+
+        # Test not batched input
+        encoded_images = feature_extractor(image_inputs[0], return_tensors="pt").pixel_values
+        self.assertEqual(
+            encoded_images.shape,
+            (
+                1,
+                self.feature_extract_tester.num_channels,
+                self.feature_extract_tester.size["height"],
+                self.feature_extract_tester.size["width"],
+            ),
+        )
+
+        # Test batched
+        encoded_images = feature_extractor(image_inputs, return_tensors="pt").pixel_values
+        self.assertEqual(
+            encoded_images.shape,
+            (
+                self.feature_extract_tester.batch_size,
+                self.feature_extract_tester.num_channels,
+                self.feature_extract_tester.size["height"],
+                self.feature_extract_tester.size["width"],
+            ),
+        )

tests/models/efficientformer/test_modeling_efficientformer.py

@@ -0,0 +1,466 @@
+# coding=utf-8
+# Copyright 2022 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" Testing suite for the PyTorch EfficientFormer model. """
+
+
+import inspect
+import unittest
+import warnings
+
+from transformers import EfficientFormerConfig
+from transformers.models.auto import get_values
+from transformers.testing_utils import require_torch, require_vision, slow, torch_device
+from transformers.utils import cached_property, is_torch_available, is_vision_available
+
+from ...test_configuration_common import ConfigTester
+from ...test_modeling_common import ModelTesterMixin, floats_tensor, ids_tensor
+
+
+if is_torch_available():
+    import torch
+
+    from transformers import (
+        MODEL_FOR_IMAGE_CLASSIFICATION_MAPPING,
+        MODEL_MAPPING,
+        EfficientFormerForImageClassification,
+        EfficientFormerForImageClassificationWithTeacher,
+        EfficientFormerModel,
+    )
+    from transformers.models.efficientformer.modeling_efficientformer import (
+        EFFICIENTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST,
+    )
+
+
+if is_vision_available():
+    from PIL import Image
+
+    from transformers import EfficientFormerImageProcessor
+
+
+class EfficientFormerModelTester:
+    def __init__(
+        self,
+        parent,
+        batch_size: int = 13,
+        image_size: int = 224,
+        patch_size: int = 2,
+        embed_dim: int = 48,  # last embed dim of stem
+        num_channels: int = 3,
+        is_training: bool = True,
+        use_labels: bool = True,
+        hidden_size: int = 448,
+        num_hidden_layers: int = 7,  # For the l1
+        num_attention_heads: int = 8,
+        intermediate_size: int = 37,
+        hidden_act: str = "gelu",
+        hidden_dropout_prob: float = 0.1,
+        attention_probs_dropout_prob: float = 0.1,
+        type_sequence_label_size: int = 10,
+        initializer_range: float = 0.02,
+        encoder_stride: int = 2,
+        num_attention_outputs: int = 1,  # For l1
+    ):
+        self.parent = parent
+        self.batch_size = batch_size
+        self.image_size = image_size
+        self.patch_size = patch_size
+        self.num_channels = num_channels
+        self.is_training = is_training
+        self.use_labels = use_labels
+        self.hidden_size = hidden_size
+        self.num_hidden_layers = num_hidden_layers
+        self.num_attention_heads = num_attention_heads
+        self.intermediate_size = intermediate_size
+        self.hidden_act = hidden_act
+        self.hidden_dropout_prob = hidden_dropout_prob
+        self.attention_probs_dropout_prob = attention_probs_dropout_prob
+        self.type_sequence_label_size = type_sequence_label_size
+        self.initializer_range = initializer_range
+        self.encoder_stride = encoder_stride
+        self.num_attention_outputs = num_attention_outputs
+        self.embed_dim = embed_dim
+        self.seq_length = embed_dim + 1
+
+    def prepare_config_and_inputs(self):
+        pixel_values = floats_tensor([self.batch_size, self.num_channels, self.image_size, self.image_size])
+
+        labels = None
+        if self.use_labels:
+            labels = ids_tensor([self.batch_size], self.type_sequence_label_size)
+
+        config = self.get_config()
+        return config, pixel_values, labels
+
+    def get_config(self):
+        return EfficientFormerConfig(
+            image_size=self.image_size,
+            patch_size=self.patch_size,
+            num_channels=self.num_channels,
+            hidden_size=self.hidden_size,
+            num_hidden_layers=self.num_hidden_layers,
+            num_attention_heads=self.num_attention_heads,
+            intermediate_size=self.intermediate_size,
+            hidden_act=self.hidden_act,
+            hidden_dropout_prob=self.hidden_dropout_prob,
+            attention_probs_dropout_prob=self.attention_probs_dropout_prob,
+            is_decoder=False,
+            initializer_range=self.initializer_range,
+            encoder_stride=self.encoder_stride,
+        )
+
+    def create_and_check_model(self, config, pixel_values, labels):
+        model = EfficientFormerModel(config=config)
+        model.to(torch_device)
+        model.eval()
+        result = model(pixel_values)
+        self.parent.assertEqual(result.last_hidden_state.shape, (self.batch_size, self.seq_length, self.hidden_size))
+
+    def create_and_check_for_image_classification(self, config, pixel_values, labels):
+        config.num_labels = self.type_sequence_label_size
+        model = EfficientFormerForImageClassification(config)
+        model.to(torch_device)
+        model.eval()
+        result = model(pixel_values, labels=labels)
+        self.parent.assertEqual(result.logits.shape, (self.batch_size, self.type_sequence_label_size))
+
+        # test greyscale images
+        config.num_channels = 1
+        model = EfficientFormerForImageClassification(config)
+        model.to(torch_device)
+        model.eval()
+
+        pixel_values = floats_tensor([self.batch_size, 1, self.image_size, self.image_size])
+        result = model(pixel_values)
+        self.parent.assertEqual(result.logits.shape, (self.batch_size, self.type_sequence_label_size))
+
+    def prepare_config_and_inputs_for_common(self):
+        config_and_inputs = self.prepare_config_and_inputs()
+        (
+            config,
+            pixel_values,
+            labels,
+        ) = config_and_inputs
+        inputs_dict = {"pixel_values": pixel_values}
+        return config, inputs_dict
+
+
+@require_torch
+class EfficientFormerModelTest(ModelTesterMixin, unittest.TestCase):
+    """
+    Here we also overwrite some of the tests of test_modeling_common.py, as EfficientFormer does not use input_ids, inputs_embeds,
+    attention_mask and seq_length.
+    """
+
+    all_model_classes = (
+        (
+            EfficientFormerModel,
+            EfficientFormerForImageClassificationWithTeacher,
+            EfficientFormerForImageClassification,
+        )
+        if is_torch_available()
+        else ()
+    )
+    fx_compatible = False
+
+    test_pruning = False
+    test_resize_embeddings = False
+    test_head_masking = False
+
+    def setUp(self):
+        self.model_tester = EfficientFormerModelTester(self)
+        self.config_tester = ConfigTester(
+            self, config_class=EfficientFormerConfig, has_text_modality=False, hidden_size=37
+        )
+
+    def test_config(self):
+        self.config_tester.run_common_tests()
+
+    @unittest.skip(reason="EfficientFormer does not use inputs_embeds")
+    def test_inputs_embeds(self):
+        pass
+
+    @unittest.skip(reason="EfficientFormer does not support input and output embeddings")
+    def test_model_common_attributes(self):
+        pass
+
+    def test_forward_signature(self):
+        config, _ = self.model_tester.prepare_config_and_inputs_for_common()
+
+        for model_class in self.all_model_classes:
+            model = model_class(config)
+            signature = inspect.signature(model.forward)
+            # signature.parameters is an OrderedDict => so arg_names order is deterministic
+            arg_names = [*signature.parameters.keys()]
+
+            expected_arg_names = ["pixel_values"]
+            self.assertListEqual(arg_names[:1], expected_arg_names)
+
+    def test_hidden_states_output(self):
+        def check_hidden_states_output(inputs_dict, config, model_class):
+            model = model_class(config)
+            model.to(torch_device)
+            model.eval()
+
+            with torch.no_grad():
+                outputs = model(**self._prepare_for_class(inputs_dict, model_class))
+
+            hidden_states = outputs.encoder_hidden_states if config.is_encoder_decoder else outputs.hidden_states
+
+            expected_num_layers = getattr(
+                self.model_tester, "expected_num_hidden_layers", self.model_tester.num_hidden_layers + 1
+            )
+            self.assertEqual(len(hidden_states), expected_num_layers)
+
+            if hasattr(self.model_tester, "encoder_seq_length"):
+                seq_length = self.model_tester.encoder_seq_length
+                if hasattr(self.model_tester, "chunk_length") and self.model_tester.chunk_length > 1:
+                    seq_length = seq_length * self.model_tester.chunk_length
+            else:
+                seq_length = self.model_tester.seq_length
+
+            self.assertListEqual(
+                list(hidden_states[-1].shape[-2:]),
+                [seq_length, self.model_tester.hidden_size],
+            )
+
+            if config.is_encoder_decoder:
+                hidden_states = outputs.decoder_hidden_states
+
+                self.assertIsInstance(hidden_states, (list, tuple))
+                self.assertEqual(len(hidden_states), expected_num_layers)
+                seq_len = getattr(self.model_tester, "seq_length", None)
+                decoder_seq_length = getattr(self.model_tester, "decoder_seq_length", seq_len)
+
+                self.assertListEqual(
+                    list(hidden_states[-1].shape[-2:]),
+                    [decoder_seq_length, self.model_tester.hidden_size],
+                )
+
+        config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()
+
+        for model_class in self.all_model_classes:
+            inputs_dict["output_hidden_states"] = True
+            check_hidden_states_output(inputs_dict, config, model_class)
+
+            # check that output_hidden_states also work using config
+            del inputs_dict["output_hidden_states"]
+            config.output_hidden_states = True
+
+            check_hidden_states_output(inputs_dict, config, model_class)
+
+    def _prepare_for_class(self, inputs_dict, model_class, return_labels=False):
+        inputs_dict = super()._prepare_for_class(inputs_dict, model_class, return_labels=return_labels)
+
+        if return_labels:
+            if model_class.__name__ == "EfficientFormerForImageClassificationWithTeacher":
+                del inputs_dict["labels"]
+
+        return inputs_dict
+
+    def test_model(self):
+        config_and_inputs = self.model_tester.prepare_config_and_inputs()
+        self.model_tester.create_and_check_model(*config_and_inputs)
+
+    @unittest.skip(reason="EfficientFormer does not implement masked image modeling yet")
+    def test_for_masked_image_modeling(self):
+        config_and_inputs = self.model_tester.prepare_config_and_inputs()
+        self.model_tester.create_and_check_for_masked_image_modeling(*config_and_inputs)
+
+    def test_for_image_classification(self):
+        config_and_inputs = self.model_tester.prepare_config_and_inputs()
+        self.model_tester.create_and_check_for_image_classification(*config_and_inputs)
+
+    # special case for EfficientFormerForImageClassificationWithTeacher model
+    def test_training(self):
+        if not self.model_tester.is_training:
+            return
+
+        config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()
+        config.return_dict = True
+
+        for model_class in self.all_model_classes:
+            # EfficientFormerForImageClassificationWithTeacher supports inference-only
+            if (
+                model_class in get_values(MODEL_MAPPING)
+                or model_class.__name__ == "EfficientFormerForImageClassificationWithTeacher"
+            ):
+                continue
+            model = model_class(config)
+            model.to(torch_device)
+            model.train()
+            inputs = self._prepare_for_class(inputs_dict, model_class, return_labels=True)
+            loss = model(**inputs).loss
+            loss.backward()
+
+    def test_problem_types(self):
+        config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()
+
+        problem_types = [
+            {"title": "multi_label_classification", "num_labels": 2, "dtype": torch.float},
+            {"title": "single_label_classification", "num_labels": 1, "dtype": torch.long},
+            {"title": "regression", "num_labels": 1, "dtype": torch.float},
+        ]
+
+        for model_class in self.all_model_classes:
+            if (
+                model_class
+                not in [
+                    *get_values(MODEL_FOR_IMAGE_CLASSIFICATION_MAPPING),
+                ]
+                or model_class.__name__ == "EfficientFormerForImageClassificationWithTeacher"
+            ):
+                continue
+
+            for problem_type in problem_types:
+                with self.subTest(msg=f"Testing {model_class} with {problem_type['title']}"):
+
+                    config.problem_type = problem_type["title"]
+                    config.num_labels = problem_type["num_labels"]
+
+                    model = model_class(config)
+                    model.to(torch_device)
+                    model.train()
+
+                    inputs = self._prepare_for_class(inputs_dict, model_class, return_labels=True)
+
+                    if problem_type["num_labels"] > 1:
+                        inputs["labels"] = inputs["labels"].unsqueeze(1).repeat(1, problem_type["num_labels"])
+
+                    inputs["labels"] = inputs["labels"].to(problem_type["dtype"])
+
+                    # This tests that we do not trigger the warning form PyTorch "Using a target size that is different
+                    # to the input size. This will likely lead to incorrect results due to broadcasting. Please ensure
+                    # they have the same size." which is a symptom something in wrong for the regression problem.
+                    # See https://github.com/huggingface/transformers/issues/11780
+                    with warnings.catch_warnings(record=True) as warning_list:
+                        loss = model(**inputs).loss
+                    for w in warning_list:
+                        if "Using a target size that is different to the input size" in str(w.message):
+                            raise ValueError(
+                                f"Something is going wrong in the regression problem: intercepted {w.message}"
+                            )
+
+                    loss.backward()
+
+    @slow
+    def test_model_from_pretrained(self):
+        for model_name in EFFICIENTFORMER_PRETRAINED_MODEL_ARCHIVE_LIST[:1]:
+            model = EfficientFormerModel.from_pretrained(model_name)
+            self.assertIsNotNone(model)
+
+    def test_attention_outputs(self):
+        config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()
+        config.return_dict = True
+
+        seq_len = getattr(self.model_tester, "seq_length", None)
+        encoder_seq_length = getattr(self.model_tester, "encoder_seq_length", seq_len)
+        encoder_key_length = getattr(self.model_tester, "key_length", encoder_seq_length)
+        chunk_length = getattr(self.model_tester, "chunk_length", None)
+        if chunk_length is not None and hasattr(self.model_tester, "num_hashes"):
+            encoder_seq_length = encoder_seq_length * self.model_tester.num_hashes
+
+        for model_class in self.all_model_classes:
+            inputs_dict["output_attentions"] = True
+            inputs_dict["output_hidden_states"] = False
+            config.return_dict = True
+            model = model_class(config)
+            model.to(torch_device)
+            model.eval()
+            with torch.no_grad():
+                outputs = model(**self._prepare_for_class(inputs_dict, model_class))
+            attentions = outputs.encoder_attentions if config.is_encoder_decoder else outputs.attentions
+            self.assertEqual(len(attentions), self.model_tester.num_attention_outputs)
+
+            # check that output_attentions also work using config
+            del inputs_dict["output_attentions"]
+            config.output_attentions = True
+            model = model_class(config)
+            model.to(torch_device)
+            model.eval()
+            with torch.no_grad():
+                outputs = model(**self._prepare_for_class(inputs_dict, model_class))
+            attentions = outputs.encoder_attentions if config.is_encoder_decoder else outputs.attentions
+            self.assertEqual(len(attentions), self.model_tester.num_attention_outputs)
+
+            if chunk_length is not None:
+                self.assertListEqual(
+                    list(attentions[0].shape[-4:]),
+                    [self.model_tester.num_attention_heads, encoder_seq_length, chunk_length, encoder_key_length],
+                )
+            else:
+                self.assertListEqual(
+                    list(attentions[0].shape[-3:]),
+                    [self.model_tester.num_attention_heads, encoder_seq_length, encoder_key_length],
+                )
+
+
+# We will verify our results on an image of cute cats
+def prepare_img():
+    image = Image.open("./tests/fixtures/tests_samples/COCO/000000039769.png")
+    return image
+
+
+@require_torch
+@require_vision
+class EfficientFormerModelIntegrationTest(unittest.TestCase):
+    @cached_property
+    def default_feature_extractor(self):
+        return (
+            EfficientFormerImageProcessor.from_pretrained("snap-research/efficientformer-l1-300")
+            if is_vision_available()
+            else None
+        )
+
+    @slow
+    def test_inference_image_classification_head(self):
+        model = EfficientFormerForImageClassification.from_pretrained("snap-research/efficientformer-l1-300").to(
+            torch_device
+        )
+
+        feature_extractor = self.default_feature_extractor
+        image = prepare_img()
+        inputs = feature_extractor(images=image, return_tensors="pt").to(torch_device)
+
+        # forward pass
+        with torch.no_grad():
+            outputs = model(**inputs)
+
+        # verify the logits
+        expected_shape = (1, 1000)
+        self.assertEqual(outputs.logits.shape, expected_shape)
+
+        expected_slice = torch.tensor([-0.0555, 0.4825, -0.0852]).to(torch_device)
+        self.assertTrue(torch.allclose(outputs.logits[0][:3], expected_slice, atol=1e-4))
+
+    @slow
+    def test_inference_image_classification_head_with_teacher(self):
+        model = EfficientFormerForImageClassificationWithTeacher.from_pretrained(
+            "snap-research/efficientformer-l1-300"
+        ).to(torch_device)
+
+        feature_extractor = self.default_feature_extractor
+        image = prepare_img()
+        inputs = feature_extractor(images=image, return_tensors="pt").to(torch_device)
+
+        # forward pass
+        with torch.no_grad():
+            outputs = model(**inputs)
+
+        # verify the logits
+        expected_shape = (1, 1000)
+        self.assertEqual(outputs.logits.shape, expected_shape)
+
+        expected_slice = torch.tensor([-0.1312, 0.4353, -1.0499]).to(torch_device)
+        self.assertTrue(torch.allclose(outputs.logits[0][:3], expected_slice, atol=1e-4))