Artists Jonathan den Breejen and Marenka Deenstra developed the interactive artwork, Ping Pong Pixel, a machine which will take in a digital image, then render a huge image using colored ping pong balls.
The installation contains a 2-meter by 3-meter display board which is injected with 2700 ping pong balls from a dispensing cabinet which contains tubs of 6 differently colored balls. Custom software analyzes the input image, then renders the image row by row until the picture is complete. Each time a new image is uploaded, the machine recirculates the balls and the whole process starts all over again.
See it in action below (youtube video):