Adds an image to bounding box transform

[wyli]

Description

a transform that computes nd coordinates of a bounding rectangle from the positive intensities.

Status

Ready

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• New tests added to cover the changes.
• Quick tests passed locally by running ./runtests.sh --quick.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[Nic-Ma]

Hi @wyli ,

I think the existing generate_spatial_bounding_box API may already support this feature?
https://github.com/Project-MONAI/MONAI/blob/master/monai/transforms/utils.py#L508
I think you can enhance the existing API if can't satisfy your request.

Thanks.

[wyli]

Hi @wyli ,

I think the existing generate_spatial_bounding_box API may already support this feature?
https://github.com/Project-MONAI/MONAI/blob/master/monai/transforms/utils.py#L508
I think you can enhance the existing API if can't satisfy your request.

Thanks.

that implementation is 3 times slower than this one. the root cause is that we don't really need to compute 'nonzero_idx = np.nonzero(data)' in order to get the bounding box. I don't have enough time to revise the existing API for now.

[Nic-Ma]

OK, let's merge this one first. Then I will try to combine with the existing API soon.

Thanks.