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add mitigation for empty bounding boxes #6923

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Merged
merged 3 commits into from
Nov 7, 2022
Merged

add mitigation for empty bounding boxes #6923

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b39a5c7
add mitigation for empty bounding boxes
pmeier Nov 7, 2022
391de87
Merge branch 'main' into empty-boxes-cuda
pmeier Nov 7, 2022
afd14d8
Merge branch 'main' into empty-boxes-cuda
pmeier Nov 7, 2022
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9 changes: 9 additions & 0 deletions torchvision/prototype/transforms/functional/_geometry.py
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Original file line number Diff line number Diff line change
Expand Up @@ -337,6 +337,9 @@ def _affine_bounding_box_xyxy(
center: Optional[List[float]] = None,
expand: bool = False,
) -> Tuple[torch.Tensor, Tuple[int, int]]:
if bounding_box.numel() == 0:
return bounding_box, spatial_size

angle, translate, shear, center = _affine_parse_args(
angle, translate, scale, shear, InterpolationMode.NEAREST, center
)
Expand Down Expand Up @@ -1013,6 +1016,9 @@ def perspective_bounding_box(
endpoints: Optional[List[List[int]]],
coefficients: Optional[List[float]] = None,
) -> torch.Tensor:
if bounding_box.numel() == 0:
return bounding_box

perspective_coeffs = _perspective_coefficients(startpoints, endpoints, coefficients)

original_shape = bounding_box.shape
Expand Down Expand Up @@ -1203,6 +1209,9 @@ def elastic_bounding_box(
format: features.BoundingBoxFormat,
displacement: torch.Tensor,
) -> torch.Tensor:
if bounding_box.numel() == 0:
return bounding_box

# TODO: add in docstring about approximation we are doing for grid inversion
displacement = displacement.to(bounding_box.device)

Expand Down