It misses a lot of dupes

I ran this on a file set of over 2500 photos in iPhoto and it missed aq bunch of things that were indeed dupes: B/W vs Color, Same/very similar picture, exact same pic but from different sources after it had been passed around through email a few times ha.

Overall though, it did reduce a lot of dupes in the collection and I just have to spend more time to go through the rest and get rid of those images I do not want that are close to the same. I tried different settings to no avail.

MetroTurtle about PhotoSweeper, v1.9.2