diffimg image1 image2 [outimage]
diffimg generates an image where each pixel is the difference between
the corresponding pixel in each of the two source images. Thus, if the
source images are the same the resulting image will be black, otherwise
it will have regions of non-black where the images differ.
Currently supports: .png, .gif, .jpg, and .ps by using ghostscript
diffimg was written by John Ellson <firstname.lastname@example.org>
This manual page was written by David Claughton <dave@eclectic-
dave.com>, for the Debian project (but may be used by others).
Jan 31, 2010 DIFFIMG(1)
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