I’m wondering how the sampling works when performing registration with masks.
In the elastix manual its written its sufficient to provide a image for the fixed image when there is no severe noise in the moving image ROI area.
What I’m confused about, is that the mask for the fixed image that i provide contains less channels/slices than my fixed image, but it still works.
For example when having 2 3D volumes and a mask matching the dimensions of the moving image:
fixed image: 100x10x10
moving image: 50x10x10
So how are samples drawn when the masks for the fixed image has less channels (or more) than the fixed image itself.
I’d be very thankful for any insights!