5971-fix the pixelshuffle upsample shape mismatch problem.

[binliunls]

Signed-off-by: binliu binliu@nvidia.com

Fixes #5971 .

Description

There is a mismatch shape between the conv weight and input shape in FlexibleUNet, if using pixelshuffle upsampling method. This is caused by the wrong initialized pre_conv parameter in the decoder, which should be default instead of None. Fixed this question in this PR by changing it to default and adding some test cases.

Types of changes

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

[Nic-Ma]

Seems related to: https://github.com/Project-MONAI/MONAI/blob/dev/monai/networks/blocks/upsample.py#L71.

Thanks.

[wyli]

/black

[wyli]

/build