I would guess that the issue here is runtime ?

Perhaps 990 images isn't too much, but this method has to be applicable for larger numbers as well. Now, comparing thousands of images that weigh several MBs each may take some time. Hashing seems like a sensible solution...

You're absolutely right about usage of a module instead of a process - especially since that process is run for each file - eeek !!

In reply to Re^2: Comparing duplicate pictures in different directories by spurperl
in thread Comparing duplicate pictures in different directories by cajun

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