How do they put the ten yard mark on the TV screen in football games. It doesn’t seem like it’s something as simple as super-impostion. The line seems to change as camera perspective changes and players seem walk “over” it not through it.
From http://www.howstuffworks.com:
http://www.howstuffworks.com/question225.htm
From the website of the company that makes it:
http://www.sportvision.com/loader.asp?level=3&node=first&subnode=info
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