I'd use 

diff -r . Duplicates

[download]
for this kind of stuff.

If you want to go Perl, I wonder why using SHA1 checksums would make the whole process better than comparing the data into the files directly - speaking of photos, you can probably accept to slurp both files and use the eq operator. Things would change if you saved the checksums for the reference directory in a file that you load at the start of the program: following invocations would avoid reading the original files giving you a benefit.

Also note that you should be able to find modules dealing with SHA1, avoiding to call a subprocess for this.

Flavio
perl -ple'$_=reverse' <<<ti.xittelop@oivalf

Don't fool yourself.

In reply to Re: Comparing duplicate pictures in different directories by polettix
in thread Comparing duplicate pictures in different directories by cajun

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