[magick-users] Can we read the ouptu of the 'compare' command and make a 'Pass/Fail' answer from it?

[vijay vaidya]

Hello People,

As part of our testing, we compare images using the 'compare' command of 'ImageMagick' like the following:

compare input.png output.png comp_result.png

The 'output' of this 'compare' command is another image ('comp_result.png' in the above example).  Now, in order to find out if the comparison was successful or not, someone has to manually open the result file named 'comp_result.png' and have a look at it.  

Instead of this arrangment (someone manually opening the output file and deciding 'Pass/Fail'), can 'ImageMagick' itself compare two images and give a '0/1 result' based on which we can mark the 'comparsion' as 'Pass/Fail'?  

The color code, '(216,  0, 27)', seems to be always present in the image drawn in case of a 'Failed Comparison'.  Can that error code be used to find out the result (presence of (216,  0, 27) indicates a 'mismatch' and its absence indicates a 'perfect match')?

Thanks for your time,
Vaidyalingam.