Sorry… I can’t show you the mosaic since it contains 100% private pictures. Maybe I’ll go download a couple of hundred pictures from Flickr and show you! I just don’t have the time right now.
Anyways, I quickly spottet a small “error” with my algorithm. Lets say you have a source image of a clear sky. After you divide the image into a grid, and scan the cells, it’s more than likely that the average color of all the cells will be the same.