User1417933 84522 gold badges1111 silver badges1414 bronze badges one There appear to be python bindings to ImageMagick: imagemagick.org/obtain/python. I have never applied them, but I've applied ImageMagick, and it'll do what you wish. user1342784 The Magic Wand furnished by it is actually very simple and only includes tolerance selection. Though waiting for link from Wiki Articles (15)