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On the field lines
I’m sitting here watching College Gameday, and I’m thinking, “how in the world do they do the line of scrimmage lines and first down lines on the field? They go undo the players but on the field and they fade away and stuff once the team’s passed it. How the heck do they do that?”
If anyone can help me out, that’d be great.
Mark
Final Render Films -
4 Replies
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My best guess would be some sort of special sensor in the cameras and transmitters along the edges of the fields (at the line of scrimmage, etc.) to keep track of the edges of the fields for the correct perspective of the line (as in that ill-fated streaking puck that Fox tried with the NHL for a while).
Then it’s a matter of having a real-time chroma key on the field, which, obviously, must be well configured and have a sufficient algorithm. In certain games (especially college) you can see errors in the chroma keying of the field.
Darby Edelen
DVD Menu Artist
Left Coast Digital
Aptos, CA -
I figured it was something relating to that, but I wasn’t sure and was very curious. Thanks for the input.
Mark
Final Render Films -
I read a quick article in Television Broadcast News magazine (Jan 2007) about “Television, Computers, & Sports” they mentioned the virtual lines of play and that SportVision is one company that provides the technology.
Their website has some cool information about the technology.
https://www.sportvision.com/
It looks to be quite a bit more complicated than one would think using lasers to get field elevation data to generate a 3d map, 3 cameras are outfitted with special gear, and computers that feed it all back to one camera.Erik
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Wow, I read that article on that site.
That is amazing. I did not know it was so advanced. I thought it was just a clever trick. Thanks for the info.
Mark
Final Render Films
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