Legacy ImageMagick Discussions Archive

Thanks very much snibgo - that did indeed work! Unfortunately trying it on a couple of similar photos from a series, generated a surprisingly complex and psychedelic 'difference' which took up more space than the original image to compress as a JPEG. Also the JPEG artifacts at quite high compression ...

Hi snibgo, Thanks for your reply, though I am using '-difference' which I gather is the mathematical XOR rather than the other one you mention. https://www.imagemagick.org/Usage/compose/#set_theory I'm using the 'composite' command line on Raspberry Pi, which presumably fires off -composite as you ...

Hi, I'm curious to create a 'difference' between 2 images that can be applied to turn one into the other. I believe XOR should do this (?) and so "composite -compose difference" should do the trick (?) In particular I'm curious whether such differences can be JPEG compressed and used to update a ...