I was trying to warp a volume in atlas space (i.e. an ROI) to single subject
space using mri_convert -ait ... (version = stable3) and ran into trouble.
I found that mri_convert will quit if the data type is int (type 1) and will
give strange results if data type is float (type 3). I was able to do what
I needed by converting my input volume to uchar (type 0).
For what I want to do, uchar works just fine, but is there some reason why
it fails for floats?
It might be helpful to include some kind of message in the help and maybe
quit it the -ait option is used and the input datatype is not uchar.
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