gqview's similitude measure

Hello,

I use the "find duplicates" tool in gqview, and I would like to know
what exactly the "similitude" measure is.

Also, if anywone here knows a similar measure which is insensitive to
picture rotation, please let me know.

By the way, gqview has proven very useful to me, thanks a lot to the devs !

cheers

--
S=E9bastien Barth=E9lemy

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