Re: hue and saturation control

On 26 Oct 2005 03:02:50 -0700, "anish" <anishs.zeus@xxxxxxxxx> wrote:

>In
>matlab, the results are coming out right but not in C,C++. how will the
>precision mistakes affect this implementation?

Perhaps you messed up the rotation by using Cb' instead of Cb when
computing Cr'? I've done that more times than I'd care to remember :)

As for the general concept, I've done it in CIELab, works fine. But
don't expect the results to be the same as if you did it in RGB space.
It will be different. You can observe this in Photoshop aswell. Take a
picture and adjust the hue by a given amount. Open another copy,
convert to Lab, then adjust the hue again by the same amount. Compare
the two.

- Asbjørn
.

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