Possible Duplicate:
Compare 2 images in php
To compare two string for similarity I use levenshtein and similar_text function in php.
Is it possible to compare for similarity two images?
Why I need this?! I have two suppliers -> two sets of products. I need to have intersections between two sets. Sometimes products' names are different (0% similar) but actually they are the same.
So I guess, I can compare them by product photo.