The Old Way
The first computer in the truck gathers all the separate readings from the cameras and transmits a single, consolidated data stream to the central computer.
The central computer takes these readings, the 3D field model and color palette, the knowledge of which camera is on the air, and together using a geometrical calculation determines which pixels in the video frame would make up the first down line. All pixels that are obstructed by a player, a referee, the ball or any other object are identified and not included in the calculation. This will ensure that the 1st & Ten line will be projected only onto the field.
The PVI Virtual Media system relies on a signal on a single spotter to relay the down and distance, and a single operator at the studio as their vision system does not need camera data to perform the insertion. The primary operator of the Sportvision system does the spotting by merely clicking on the video to place the line.
Read more about this topic: 1st & Ten (graphics System)
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