Fix _parallelogram_to_bounding_boxes

[AntoineSimoulin]

This PR adjust the behavior of _parallelogram_to_bounding_boxes. Instead of transforming a parallelogram into a rectangle based on the largest input diagonal, the function returns the minimum area rectangle covering the initial parallelogram. When applying transforms to input rotated bounding boxes, the output tend to be closer to the original boxes and therefore more consistent.

We illustrate below the impact when applying the transforms v2.RandomPerspective(distortion_scale=0.6, p=1.0) in the tutorial to transforms on Rotated Bounding Boxes.

Before fix:

After fix:

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/vision/9181

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❌ 15 New Failures

As of commit 0a2a419 with merge base b818d32 ():

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• Build Aarch64 Linux Wheels / pytorch/vision / build-wheel-py3_9-cuda-aarch6412_9-aarch64 (gh)
• Build Aarch64 Linux Wheels / pytorch/vision / upload / upload-wheel-py3_9-cuda-aarch6412_9-aarch64 (gh)
  Unable to download artifact(s): Artifact not found for name: pytorch_vision__3.9_cu129_aarch64
• Docs / build / linux-job (gh)
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• Tests / unittests-linux (3.10, linux.12xlarge, cpu) / linux-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-linux (3.11, linux.12xlarge, cpu) / linux-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-linux (3.12, linux.12xlarge, cpu) / linux-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-linux (3.9, linux.12xlarge, cpu) / linux-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-linux (3.9, linux.g5.4xlarge.nvidia.gpu, cuda, 12.6) / linux-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cuda-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-macos (3.10, macos-m1-stable) / macos-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-macos (3.12, macos-m1-stable) / macos-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-macos (3.9, macos-m1-stable) / macos-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-windows (3.10, windows.4xlarge, cpu) / windows-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-windows (3.11, windows.4xlarge, cpu) / windows-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-windows (3.12, windows.4xlarge, cpu) / windows-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]
• Tests / unittests-windows (3.9, windows.4xlarge, cpu) / windows-job (gh)
  test/test_transforms_v2.py::TestCrop::test_transform_bounding_boxes_correctness[4-cpu-dtype0-BoundingBoxFormat.XYWHR-output_size0]

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