Tool for comparing two images?


Solution 1

Beyond Compare is really a file-and-folder comparison tool, but it also contains image comparisons (example link).

There's a free trial. I bought this tool ($30) because it's so incredibly useful for many things.

Solution 2

I use AKS

It allows you to compare two JPG files and show differences between them. For instance, this tool allows you to compare two versions of the same image, chart, diagram or scheme.

Solution 3

Okay this is going to sound ridiculous, but if they are the same size you can put them side by side and cross your eyes like you would for a magic eye 3D picture, and the differences will stand out as if they are flickering (as your brain quickly alternates between the two different overlapped picture elements)

I use this "cheat" when I play those spot-the-difference flash games :P

Solution 4

perceptual diff:

PerceptualDiff is an image comparison utility that 
makes use of a computational model of the human visual 
system to compare two images.

Solution 5

There's the Araxis tools. From the screen shots on the page it appears that it highlights differences too.


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Updated on July 13, 2020


  • Lazer
    Lazer almost 2 years

    I have two images that are slightly different. (The second is actually generated by some manipulation in MatLab).

    I need some way to compare these two images.Some utility that can highlight where the differences are.

    [I know this can be done in Matlab, but I don't want to do it that way. Some easier method... some app maybe?]

    • phuclv
      phuclv almost 7 years
      Too old. But this should be on Software Recommendations
    • miroxlav
      miroxlav almost 7 years
      @LưuVĩnhPhúc – if it was asked today... But this question was asked about 5 years before Software Recommendations was established.
    • Ramhound
      Ramhound almost 5 years
      @miroxlav - It's still not on topic so it should be closed, otherwise, we are just going to get answers that suggest random applications which don't meet the criteria of suggesting software here at Superuser.
    • miroxlav
      miroxlav almost 5 years
      @Ramhound – I agree, but some time ago some more experienced users told me that it is acceptable for old questions to remain where they are. I would be among the first to close (and possibly migrate) the question (or suggest the migration to OP).
  • raven
    raven over 12 years
    Beyond Compare really does live up to its name. It is the greatest comparison tool on the planet.
  • Lazer
    Lazer over 12 years
    :) actually my images are very high resolution with just one or two pixels difference between them (thats right - just some pixels)
  • warren
    warren over 12 years
    magic eye 3d ftw!
  • MarcusJ
    MarcusJ almost 8 years
    Eh, I just tried it on two PNGs, both being solid white, 300x200 in size, one was straight from photoshop, the other was compressed with imageptim (lossless image compression tool) and it said 60,000 pixels were different, turns out, there's 60,000 pixels in a 300x200 image...
  • akira
    akira almost 8 years
    provide both pictures and i might tell you more.