Assessing the quality of an image with respect to compression?

Question

I have images that I am using for a computer vision task. The task is sensitive to image quality. I\'d like to remove all images that are below a certain threshold, but I

Answer 1

One simple heuristic could be to look at width * height * color depth < sigma * file size. You would have to determine a good value for sigma, of course. sigma would be dependent on the expected entropy of the images you are looking at.