[losses] Add global normalized cross correlation

BioMedIA / deepali

Image, point set, and surface registration in PyTorch.

https://biomedia.github.io/deepali/

Apache License 2.0

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[losses] Add global normalized cross correlation #101

Closed aschuh-hf closed 1 year ago

aschuh-hf commented 1 year ago

Add pairwise ncc_loss() function and NCC loss. Unlike lcc_loss() and LCC, these compute the normalized cross correlation over the entire image grid rather than local rectangular windows.