Where have all of the wires gone?

[mes5107]

The photo finish camera takes a small slice of the track at the finish line. It takes many pictures of this section every second. After the camera is turned off, the stewards can bring up the photo finish on a computer screen. This photo is a compilation of all of those tiny slices that were taken. They can then "move" the finish line anywhere they want on this photo with the mouse to see who beat who in the race. The wire on the photo finish is computer generated.