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BilinearReverse doesnt work in 6.6.7-4

Posted: 2011-08-05T12:09:44-07:00
by ecoverguru
I have imagemagick version 6.6.7-4 2011-02-01 Q16 installed, but "BilinearReverse " doesnt seems to work..

The documentation says "Before IM v6.5.1-2 the 'BilinearReverse' distortion was implemented simply as 'Bilinear'." so i guess in my version it should work right?

Re: BilinearReverse doesnt work in 6.6.7-4

Posted: 2011-08-05T13:58:30-07:00
by fmw42
What was your exact command line?

Also the order of control points changed in more current versions. See http://www.imagemagick.org/Usage/distor ... rol_points

Re: BilinearReverse doesnt work in 6.6.7-4

Posted: 2011-08-05T14:07:44-07:00
by fmw42
This works fine for me in IM 6.7.1.2 Q16 Mac OSX tiger:


convert mandril.jpg -matte -virtual-pixel black \
-distort BilinearReverse \
'0,0 26,0 128,0 114,23 128,128 128,100 0,128 0,123' \
mandril_blin_rev2.jpg


see http://www.imagemagick.org/Usage/distor ... ar_reverse

Re: BilinearReverse doesnt work in 6.6.7-4

Posted: 2011-08-05T14:13:11-07:00
by ecoverguru
I was actually trying to achieve the following with BilinearReverse but now it seems Polynomial '1.5 is an alternative.. here is the thread I wanted actually help for

viewtopic.php?f=1&t=19247