Elias Probst skrev: > Am Sonntag, 27. Januar 2008 14:54:15 schrieb Erik: > >> I need to find the difference between images (like the text-file diff >> command, but for RGBA images). I tried "compare A.png A.png >> difference.png". This should obviously produce some kind of blank image >> because A.png and A.png are the same file, but for some weird reason the >> produced difference.png has recognizable content! Is there a fix for >> that bug or any other image diff program that is sane? >> > The easiest way for doing this, is using GIMP. > - Use one layer for each image > - Use the 'Subtract' mode for displaying the second layer > Not sure how to do this. I am not a graphic artist. But I just open it with "gimp a.png b.png" and press Ctrl-C in one image, switch to the other and press Ctrl-V. That seems to create a second layer. Then I have no idea what to do.
A simple command would be useful. I might have to regression-test 1000 images in a svn commit because some of them seem to have been modified by optipng. -- gentoo-user@lists.gentoo.org mailing list
