I wasn't very successful, but I tried to use "uniformity" criteria - if it looked like there are portions of the picture that were being omitted or abstracted a

I wasn't very successful, but I tried to use "uniformity" criteria - if it looked like there are portions of the picture that were being omitted or abstracted away, I assumed human and vice versa. I wonder if the algorithm could be improved if it had a sense of what is "important" in the picture, and then choose a different algorithm to process important and unimportant portions.