Final Result
After the camera computer has determined which pixels represent the 1st & Ten line, it takes that pixel information and draws the yellow line in video format at around 60 times per second (depends on video refresh frequency).
In recent years the system has been upgraded to add more features. During Fox broadcasts, the Sportvision system also generates an arrow-like graphic on the field with down and distance text information inside of an arrow pointing in the direction of play. Competitors have also added this feature in recent years.
Additionally, the Sportvision system can also place virtual graphics that have another embedded video feed inside them like a video picture frame. This is sometimes called "video-in-perspective".
This technology is also the basis for showing ads where they may not appear (i.e. behind home plate in baseball during national broadcasts), and Race F/X in which images can be displayed on the race track, and info can follow a specific car, no matter what the camera does. This technology is used by CBS, ESPN, Fox, NBC, NFL Network, RDS, TSN, and TNT.
Read more about this topic: 1st & Ten (graphics System)
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