Re: electronic stripes

[John Denker <jsd@MONMOUTH.COM>]

At 08:29 AM 10/13/99 -0700, Roger Haar wrote:
> it
> seems that the Player/grass problem is done with something
> more advanced than the standard weatherman chroma key.  I
> have watched closely to see if green uniforms or grass
> stains turn yellow, and I have not seen it.  Also, I vaguely
> remember seeing shadows under players look pretty well done.

That's interesting.

Here's a refinement to my previous guess:  remember these days a lot of
this stuff is MPEG-encoded for digital broadcast anyway.  MPEG encoders are
verrrry smart about encoding background (non-moving objects) differently
from foreground (moving objects).  So in this space it would be relatively
easy to put the stripe above the grass and below the the players -- and
their shadows.  I predict that if a green player lies still for long
enough, the stripe would go over him.


______________________________________________________________
copyright (C) 1999 John S. Denker             jsd@monmouth.com