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Thanks for sharing the excellent codes.
I have two questions about your version18e codes:
1. In image_difference.m, line 34, if(exist('type','var')==0), type='p'; end. should here type = 'd' as default? Because there is no type 'p'
2. In example_2d_affine.m, can you explain a little bit about why the scale = [1 1 1 0.1 0.1] needed here? I didn't figure out the purpose of scale here.
Thanks very much.