Legacy ImageMagick Discussions Archive

Thanks a lot to glennrp & fmw42 for a more quicker "image-is-zero"-check , especially for large images! (I´m more or less the type of "seeing is believing" which led me to my "fill-with-white" solution.) glennrp´s command works well and usually I´d trust at first the results of ImageMagick blindly, b ...

The "ModulusAdd" and "ModulusSubtract" commands work well, so this problem is SOLVED! :D If anyone has the same task, here is the workflow including the commandlines to set: composite -compose ModulusSubtract "OriginalImage1.bmp" "ToSubtractImage2.jpg" "ResultingImage3.png" (image formats are ...

Well, just stumbled upon the commands "ModulusAdd" and "ModulusSubtract" of the "compose" command. This should wrap around 0/255.
I´ll test these commands tomorrow. If they won´t work like the way I need them, I´ll be back here again.

Kind regards,
Didi

Hello to the Experts, I have 1 image and a 2nd image and I´d like to build the difference between them as a 3rd image. After that I want to merge the 2nd and the 3rd image, and the result should give back EXACTLY the first image. This sounds easy but by using GIMP (2 layers and the modes subtraction/ ...