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Thread: Video: Color to B/W conversion
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face BY : David VanHorn email (remove spam text)



At 12:33 AM 11/29/00 -0500, Sean H. Breheny wrote:
>Hi all,
>
>Quick video question: I want to try taking a color video signal and use a
>high speed comparator to compare the brightness of pixels to some set value
>(trying to detect a dark object against a light background). I want to
>reject the color information in this process (luma only). How can I do
>this? I know it must be fairly simple since B/W TV's can accept color
signals.

You're already there.
NTSC carries chroma on a subcarrier.
The baseband signal is only lumiance and sync.
B/W TVs don't pay any attention to the subcarrier, and neither should you.


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Subject (change) Video: Color to B/W conversion

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