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ANTsX / ANTsPy

A fast medical imaging analysis library in Python with algorithms for registration, segmentation, and more.
https://antspyx.readthedocs.io
Apache License 2.0
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Documentation Ants Parameters #410

Closed ninusch closed 7 months ago

ninusch commented 1 year ago

What do the parameters "flow_sigma (scalar) – smoothing for update field" and "total_sigma (scalar) – smoothing for total field" do exactly? I don't understand from the documentation.

ntustison commented 1 year ago

At each iteration, the similarity metric and gradient is calculated. That gradient field is also called the update field and is smoothed before composing with the total field (i.e., the estimate of the total transform at that iteration). This total field can also be smoothed after each iteration.

ncullen93 commented 7 months ago

The docs have been updated to provide more info in https://github.com/ANTsX/ANTsPy/pull/535. Closing :)