2012/7/26 Jordi Gutiérrez Hermoso <jord...@octave.org> > On 26 July 2012 04:36, pantxo diribarne <pantxo.diriba...@gmail.com> > wrote: > > I quickly wrote a draft cp2tform.m that I can develop and share if nobody > > has a more advanced version. > > Any reason why you haven't shared it already? :-) > > - Jordi G. H. > Maybe because it's a draft (see attachement). I am currently trying to figure out what inverse and forward transform means.
I only tested it with "x-sheared" point coordinates (cap) vs real coordiantes (crw). A simple test : cap = [1, 0; 2, 0; 3, 0; 1.1, 1; 2.1, 1; 3.1, 1]; crw = [1, 0; 2, 0; 3, 0; 1, 1; 2, 1; 3, 1]; plot (cap(:,1), cap(:,2), '+r;apparent;', crw(:,1), crw(:,2),'+k;real world;') axis ([.5 3.5 -.5 1.5]) T = cp2tform (cap, crw, 'Affine'); T.forward_fcn (cap, T.tdata(:,1)) - crw(:,1) T.forward_fcn (cap, T.tdata(:,2)) - crw(:,2) T = cp2tform (cap, crw, 'Polynomial', 4); T.forward_fcn (cap, T.tdata(:,1)) - crw(:,1) T.forward_fcn (cap, T.tdata(:,2)) - crw(:,2) Pantxo
cp2tform.m
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