Abstract: A method comprising using at least one hardware processor for: receiving a continuous stream of images; and in real time, for each image of some of the images: extracting composition features from the image, determining photographic composition functions for at least some of the extracted composition features based on a plurality of composition rules, defining a photographic composition sum-function by summing up at least some of the photographic composition functions, and calculating an extremum of the photographic composition sum-function, wherein the extremum reflects a photographic composition suggestion with respect to a photographic composition of the image.