User1417933 84522 gold badges1111 silver badges1414 bronze badges one There look like python bindings to ImageMagick: imagemagick.org/download/python. I have not applied them, but I've utilised ImageMagick, and it will do what you want. user1342784 From there, it had been only a brief way to make use of the aforementioned equation waiting for link from Wiki Articles (15)