ANTSUseDeformationFieldToGetAffineTransform(1) part of ANTS registration suite


ANTSUseDeformationFieldToGetAffineTransform ,zzzWarp.nii.gz load_ratio(ex: 0.01) /[,rigid | affine/] ,OutAffine.txt /[,mask.nii.gz/]


we expect the input deformation field in the same physical space as the images you want to

load_ratio: ratio of points to be loaded from deformation field (to save memory)

the mask gives the region from which points will be selected ...