Legacy ImageMagick Discussions Archive

Ok... It will be a second command line but how to calc PSNR of this diff image using only IM? Comparing multipage images is a real usecase! Now IM silently compare first two pages of a first tiff file... or last two pages of a second file... whatever... it is a bug. Should I fill an issue in the ...

I am getting this error "compare.exe: unrecognized option `-layers' @ error/compare.c/CompareImageCommand/707." But even if I remove -layers from command line, say "compare -metric psnr multipage.tif null: multipage.tif diff.tif", IM prints 11.0495 PSNR to standard output. I'ts not how it should ...

Ok. Is there any way to compare multipage tiffs on a page by page basis? With a one line command.

I do not want to split animation into frames. I just want to compare two multipage tiffs. I tried to run "compare -metric PSNR multipage1.tif multipage2.tif diff.tif" and it fails. Even though both tiffs are equal IM shows 11.7 PSNR and diff.tif contains only one meaningless page.

Did multipage images comparison ever worked in imagemagick?