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Can I use Beyond Compare on Windows 7 command line (cmd or Cygwin) to compare 2 images' content (their file format could vary, so I can't use a byte comparison) in a batch file?

If so, how do I interpret the Errorlevel codes returned? These are what I found so far:

1:   Files are byte-identical.
2:   Files are look identical but one is an indexed PNG and the other a Truecolor one.
13:  Files are different.
100: File doesn't exist.

I can't find any reference on Scooter Software's website or on Help.

Is it possible to set a tolerance (as in the interactive tool) e.g. to ignore minor differences?

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echo %errorlevel% might help! and a line like this if %errorlevel%==0 echo 0 or like this if %errorlevel%==1 echo 1 As for tolerance, that's very specialist photo/image software like photoshop. try graphicdesign.stackexchange.com or making use of this command perhaps imagemagick.org/script/compare.php –  barlop Mar 7 at 16:41

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