For a split second I was excited and terrified because I thought this was a very similarly named Go project I wrote a while ago. It’s nowhere near as fancy but is very fast and has a very similar name.

I don’t have the background in imaging these people likely have but mine works by breaking an image into an X by X map of average colors and comparing, written specifically because I needed to find similar images of different aspect ratios and at the time I couldn’t find anything.

https://github.com/donatj/imgdedup