Add D-FINE to KerasHub (#2318)

* init: Add initial project structure and files

* test: Enable test cases (will fail until HGNetV2 dep added)

* refactor: Make clean and consistent API design choices

* refactor: Remove the task model from the scope of this PR

* refactor: Enhance test suite robustness and standardize weight init to match original

* nit: Remove the problematic channel_axis from the deserialization args

* nit: Replace hyphen with underscore in preset name

* refactor: Implement code cleanup based on review feedback

* refactor: Address code reviews

* nit: Remove unnecessary Keras serialization decorator

* refactor: Resolve review comments

* update: Enable HGNetV2 and D-FINE tests!

* test: Enable `run_data_format_check`

* feat: Add DFineObjectDetector (TODO: Make loss batch-aware)

* skipif: Bbox utils are not supported before Keras < 3.8.0

* test: Minor implementation review

* Complete TODO: Make loss fully batch-aware

* finals: Add adaptation explanations; denoising query range

* fix: GPU tests + memory optimization

* change: Reduce memory usage with minimal test configuration

* reviews: Incorporate comments

* nits: Move loss to separate file + address review feedback (Gemini, Sachin)

* nit: Skip HF preset loading test on TensorFlow GPU CI due to an unknown OOM error

Author: harshaljanjani

keras_hub/api/layers/__init__.py

@@ -75,6 +75,9 @@
 from keras_hub.src.models.cspnet.cspnet_image_converter import (
     CSPNetImageConverter as CSPNetImageConverter,
 )
+from keras_hub.src.models.d_fine.d_fine_image_converter import (
+    DFineImageConverter as DFineImageConverter,
+)
 from keras_hub.src.models.deeplab_v3.deeplab_v3_image_converter import (
     DeepLabV3ImageConverter as DeepLabV3ImageConverter,
 )

keras_hub/api/models/__init__.py

@@ -108,6 +108,15 @@
 from keras_hub.src.models.cspnet.cspnet_image_classifier_preprocessor import (
     CSPNetImageClassifierPreprocessor as CSPNetImageClassifierPreprocessor,
 )
+from keras_hub.src.models.d_fine.d_fine_backbone import (
+    DFineBackbone as DFineBackbone,
+)
+from keras_hub.src.models.d_fine.d_fine_object_detector import (
+    DFineObjectDetector as DFineObjectDetector,
+)
+from keras_hub.src.models.d_fine.d_fine_object_detector_preprocessor import (
+    DFineObjectDetectorPreprocessor as DFineObjectDetectorPreprocessor,
+)
 from keras_hub.src.models.deberta_v3.deberta_v3_backbone import (
     DebertaV3Backbone as DebertaV3Backbone,
 )