https://www.pixelock.com/

Nobody has mentioned soylent green yet? Or perhaps a similar solution: feed the homeless to the hungry.

I'm assuming you want to automatically/programmatically discard the one with the least/most artifacts. In this case there are very few programs around, but I'm working on a rules engine for my program that may be able to help you in future. Please evaluate DuMP3 at http://dump3.sourceforge.net/ to see if it may suit your needs.