There are better programs, but the tradeoff is speed. fdupes is quite fast.

I hadn't really thought about just comparing file sizes and then md5sum the ones that are the same size, that would speed things up a lot. And it's probably what fdupes already does.

On 24 January 2014 16:35, Lawrence D'Oliveiro <ldo@geek-central.gen.nz> wrote:

On Fri, 24 Jan 2014 16:26:24 +1300, Michael Cree wrote:

> What if one is a slight modification of the other, say a
> contrast adjustment for better viewing?

Maybe this <http://packages.debian.org/wheezy/findimagedupes> might
help.

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