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[Cherry-pick for 0.21] Fix doc of masks_to_boxes (#8798) #8799

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Dec 12, 2024
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[Cherry-pick for 0.21] Fix doc of masks_to_boxes (#8798) #8799

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8 changes: 7 additions & 1 deletion torchvision/ops/boxes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -404,7 +404,13 @@ def masks_to_boxes(masks: torch.Tensor) -> torch.Tensor:
Compute the bounding boxes around the provided masks.

Returns a [N, 4] tensor containing bounding boxes. The boxes are in ``(x1, y1, x2, y2)`` format with
``0 <= x1 < x2`` and ``0 <= y1 < y2``.
``0 <= x1 <= x2`` and ``0 <= y1 <= y2``.

.. warning::

In most cases the output will guarantee ``x1 < x2`` and ``y1 < y2``. But
if the input is degenerate, e.g. if a mask is a single row or a single
column, then the output may have x1 = x2 or y1 = y2.

Args:
masks (Tensor[N, H, W]): masks to transform where N is the number of masks
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