Legacy ImageMagick Discussions Archive

I have no idea what that "null:" is basically used for? Anyway, yes the differences images are black, but the differences are hard to spot since they are so small and marked with dark red. For big pages, this is could be a real challenge to spot the difference. That's why I wanted to chang...

Hmm it seems as if I am getting white background images only if the images are identical!? In case of a difference the images are dark red on black but... still can't seem to find the difference if it's just a minor one. Any suggestion on how to make even tiny difference visible would be awesome!

Sorry for bumping my old question, but I seem to be unable to format the difference images. At the moment the difference images are white and in my case the differences are just tiny so it's quite hard to find them on the screen. I got the hope that inversed colours will make it easier to spot the d...

Awesome, this works like a dream and is exactly what I needed.

Thank you both and have a great Christmas time!

Is there a way to generate difference images? So that just the differences are visible after the comparison?

Thanks again, snibgo! Now it's running just fine! I assume that the resulting numbers have to be interpreted as similarity? So 0.0 means 100% similarity while 0.01 means 99% similarity?!

Damn, I completely missed the "magic convert" part! :shock: I'm really sorry for that! I corrected the command line but it's still giving me an error: C:\Users\me>magick d:\Temp\A.pdf d:\Temp\B.pdf -compose Difference -layers composite -format %[fx:mean]\n info: magick: missing Null Image ...

Thanks snibgo! This seems to work, at least.... for a start. After some minutes another error is reported:

convert: missing Null Image List Separator layers Composite @ error/mogrify.c/MogrifyImageList/8473.

As an additional information, the PDFs weigh ~66MB and ~18MB and contain 80 pages each.

Hi all, I want to compare 2 PDF files and a Google search revealed an older topic that explains how to do a PDF comparison using ImageMagick: https://www.imagemagick.org/discourse-server/viewtopic.php?t=29277 Probably I'm missing something because when I run the suggested command line (on Windows 10...