Mitch Miller wrote:
>
> > Does anyone know how they impose the yellow 1st down lines on our screens?
>
> Yeah, I always thought that was pretty clever how they make it look like
> it's actually laying just above the turf ... I'd have thought if they put
> it up via some form of post-processing, that it would look like a solid
> stripe across our screen, on top of players, etc.  Must be some pretty
> cool processing going on there.

It should be pretty easy to detect the green
turf, not much green elsewhere. In RGB that's
very easy, then some simple size or detail-change
(movement) stuff to remove the players. Then just
put the line over the bright-green non-moving
bits. :o)
-Roman

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