Add DETA (#20983)

* First draft

* Add initial draft of conversion script

* Convert all weights

* Fix config

* Add image processor

* Fix DetaImageProcessor

* Run make fix copies

* Remove timm dependency

* Fix dummy objects

* Improve loss function

* Remove conv_encoder attribute

* Update conversion scripts

* Improve postprocessing + docs

* Fix copied from statements

* Add tests

* Improve postprocessing

* Improve postprocessing

* Update READMEs

* More improvements

* Fix rebase

* Add is_torchvision_available

* Add torchvision dependency

* Fix typo and README

* Fix bug

* Add copied from

* Fix style

* Apply suggestions

* Fix thanks to @ydshieh

* Fix another dependency check

* Simplify image processor

* Add scipy

* Improve code

* Add threshold argument

* Fix bug

* Set default threshold

* Improve integration test

* Add another integration test

* Update setup.py

* Address review

* Improve deformable attention function

* Improve copied from

* Use relative imports

* Address review

* Replace assertions

* Address review

* Update dummies

* Remove dummies

* Address comments, update READMEs

* Remove custom kernel code

* Add image processor tests

* Add requires_backends

* Add minor comment

* Update scripts

* Update organization name

* Fix defaults, add doc tests

* Add id2label for object 365

* Fix tests

* Update task guide

src/transformers/testing_utils.py

@@ -90,6 +90,7 @@ from .utils import (
     is_torch_tpu_available,
     is_torchaudio_available,
     is_torchdynamo_available,
+    is_torchvision_available,
     is_vision_available,
 )
 
@@ -307,6 +308,16 @@ def require_torch(test_case):
     return unittest.skipUnless(is_torch_available(), "test requires PyTorch")(test_case)
 
 
+def require_torchvision(test_case):
+    """
+    Decorator marking a test that requires Torchvision.
+
+    These tests are skipped when Torchvision isn't installed.
+
+    """
+    return unittest.skipUnless(is_torchvision_available(), "test requires Torchvision")(test_case)
+
+
 def require_torch_or_tf(test_case):
     """
     Decorator marking a test that requires PyTorch or TensorFlow.