[magick-users] Is there an option to tell Image Magick not to consider the intensity of the colors while comparing two images

[Anthony Thyssen]

On Thu, 28 May 2009 13:17:12 -0700
Fred Weinhaus <fmw at alink.net> wrote:

| Replace the intensity channel in each of your two images with one of 
| the other two channels. then do your compare?
| 
| see http://www.imagemagick.org/Usage/channels/#channels
| 
More specifically convert the image to HSL and replace the 
luminance (or 'B') channel before comparing

   convert image1.png image2.png -colorspace HSL \
           -channel B -evaluate set 50%  miff:- |\
       compare -  cmp_image.png

You can also use -compose difference  too which will avoid the need
for the pipeline between the two commands, and let you do the processing
all in a single image.

See Difference Images
   http://www.imagemagick.org/Usage/compare/#difference



  Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
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  Here's the thing about the Future...
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     Anthony's Home is his Castle     http://www.cit.gu.edu.au/~anthony/