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Preprocess CP2TFORM

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When CP2TFORM is used in piecewise linear image transformation mode, it uses triangulation to calculate the local image transformation. Sometimes a good triangulation of basepoints gives folded triangles when used with the input points. The function CP2TFORM try's to remove the controlpoints causing the folding, but often fails with the error:

Eliminated * control point pair(s).
Fold-over triangles remain. See CP2TFORM reference page.

This function PreProcessCp2tform removes all control points which cause fold-over triangles with cp2tform.

example code :
xy=[input_points2(:,2) input_points2(:,1)];
uv=[base_points2(:,2) base_points2(:,1)];
[xy uv]=PreProcessCp2tform(xy,uv);
trans_prj = cp2tform(xy,uv,'piecewise linear');
J = imtransform(I,trans_prj,'Xdata',[1 100],'YData',[1 100],'XYscale',1);

Free download from Shareware Connection - When CP2TFORM is used in piecewise linear image transformation mode, it uses triangulation to calculate the local image transformation.

Publisher: Dirk-Jan Kroon | License: Freeware | Price: 0.00
Version: 1.0 | Size: 10 KB | Platform: Matlab, Scripts
Released Date: 27-06-2013 | Rating: 0 | Title: Preprocess CP2TFORM

Author Url: http://www.mathworks.com/
Program Info Url: http://www.mathworks.com/
Download Url: http://www.mathworks.com/matlabcentral/fx_files/26985/1/PreProcessCp2tform.zip

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