Yes after trying out luminance style plotting, I'm sure its based on uniformity! How about taking a point(p,q) and the area of 3x3 around it, find the average

Yes after trying out luminance style plotting, I'm sure its based on uniformity! How about taking a point(p,q) and the area of 3x3 around it, find the average of luminance in this 3x3 block, store it as a0 and now increase the size of 3x3 square to 4x4, find average of luminance, lets call it a1, now if |a1-a0|<threshold, we say the area is uniform! and repeat steps till size<size_threshold Will this work? or instead of averaging luminance, I should average R,G,B separately and match against threshhold to increase the size(to be more strict) Have got exam tomorrow, will work more on these insights as soon as I finish preparing my data sctuctures and discrete maths syllabus. thanks :), (psst! can't get my head away from these new ideas)