Each object must be a different gray level. Print a copy of your image on a black and white printer. Demo the gimp plug-in to me on a computer in EPS 254 running Linux. Write a gimp plug-in to generate a horizontal scan line through a loaded image. Adjust your output to match the size of the image.
Output can be a list of integers dumped to standard out.
Write your gimp plug-in to generate a horizontal OR a vertical scan line. These four values define two points in the transform. You would assume three straight lines connect these points. Process one of the images through two separate transforms. You can enter the values using prompts and standard input from the keyboard.