Cool.  Thanks Josh.

<crap explanation>

And to explain why we have HSV at all:  Think about analog
television.  If you look at the V channel of an image by itself, it's
the same image, just "black and white".  So adding the H and S
channels to an old black and white broadcast, you add colour.

JPEG/MPEG uses HSV so that the H and S channels can be scaled down as
our eyes aren't as sensitive to colour as they are luminance.  Hence
the options such as 4:1:1 and 4:2:2 when encoding.  This is why you
can sometimes see colour bleed on hard edges.  Also, you get much
better entropy when encoding these channels independently.

</crap explanation>

On Oct 26, 8:19 am, Joshua Marinacci <[email protected]> wrote:
> For those of you who are interested in design and usability, I've  
> started my series on design fundamentals with an explanation of color.  
> I'd love to get your feedback.
>
> http://www.joshondesign.com/?p=54
>
> - Josh
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