Comparison of programs programmatically - lib or class

Question

My goal is to provide 2 image files and get a true / false answer about whether these 2 files can be the same (within an acceptable degree of confidence).

I understand that this issue falls under artificial intelligence and is much more complicated than it seems, so I doubt very much that I could (or even would like) to do it myself. I'm probably looking for a library or class. I am working with PHP.

thanks in advance.

All useful answers / comments are put to the vote.

Update:

Interestingly, I am complicating this too much, and maybe a more general library like imageMagick (imagick) can do this? Anyone more experienced using imageMagick?

Answer 1

http://tineye.com/ may be useful if you are simply comparing your own images.

You should probably do some research on image similarity algorithms, although all the advanced ones are not suitable for a scripting language such as PHP. The simplest comparison method will work as follows:

• Take both images of the same size, if they were not already.
• Compare each corresponding pixel and determine how similar they are. The simplest method is to distinguish between red values, then blue values, then green values ​​and average values.
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Answer 2

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Answer 3

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