Finding an interesting frame in a video

Question

Does anyone know of an algorithm that I could use to find an \"interesting\" representative thumbnail for a video?

I have say 30 bitmaps and I would like to choose the

Answer 1

It may also be beneficial to favor frames that are aesthetically pleasing. That is, look for common attributes of photography-- aspect ratio, contrast, balance, etc.

It would be hard to find a representative shot if you don't know what you're looking for. But with some heuristics and my suggestion, at least you could come up with something good looking.