When I download archives, they often contain images I already have in another folder, but mostly with another name or file-format.
My question: What script / software 1 do you know, that can recognize 2 duplicate images?
It should let you decide if they are really the same (and possibly remove the images with inferior quality).
1 at best cross-platform, but Linux would be sufficient
2 e.g. by their color-difference or something