Hi All,
I have watched many topics through this list, and
I'm often amazed at what people are doing with PIC's.

I have wondered more than once if a PIC could be
used for video signal motion detection. I assume
that a sync separator and NTSC(or PAL) to RGB conversion
would be handled by dedicated chips, but could
a PIC go from the resulting RGB signals to
some kind of motion detector output?

I understand that this is most often done in
PC's by keeping a copy of the previous video frame,
and comparing it to the current frame. Blanking
of certain areas and an overall sensitivity
adjustment are also useful. Obviously, a bare
PIC could not buffer a full video frame. It is
also unlikely that you could resolve all the
information in a current frame at the full speed
of the incoming signal.

Some method of mathematically "hashing" the video
as it streams into the PIC, even if only every
2nd, 3rd, or 4th pixel is sampled, might provide=20
enough info for the program to detect change.

Of course, a certain amount of background noise
may be present, even on a "dark" signal, so some
sensitivity adjustment will be needed.

This is all just wild ideas at the moment. Has
anyone else ever considered something like this?

Thanks,
Lyle Hazelwood

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