At one of the mini maker faire's at OMSI (a science museum in Portland) in past years, there was a guy with a penny sorting machine he had built. The machine w

At one of the mini maker faire's at OMSI (a science museum in Portland) in past years, there was a guy with a penny sorting machine he had built. The machine would sort pennies by shininess, and direct them into the appropriate column based on a target greyscale image. The idea was to have a machine that could sort pennies to make a mural based on picture. (If a penny doesn't match the desired color of one of the columns, it would be redirected into a reject bin.) This game boy camera seems like an ideal input device for such a machine.