Re: [CinePaint] Really basic script for batch converting.

On Wed, 25 Nov 2009, [email protected] wrote:
>
> Ok, so is dithering only used for going from high bit depth to lower? Is
> the noise I'm adding after conversion 'dithering' or just damaging the
> image?

Just to be clear.  Adding noise is adding "damage".  Dithering is 
adding "damage".

>> The video YCbCr to RGB path should not be lossy.
>
> Ok, I thought YCbCr was a bigger colour space and that the conversion to
> RGB (8bit) was lossy.

It is true that YCbCr provides an opportunity for a larger color 
gammut, but standard Rec.709 video does not use it, and there is no 
standard/effective way to use extended gammut because your monitor 
can't show it to you.  The Rec.709 video model depends on the ability 
to convert from RGB to YCbCr and back again with minimal visible loss.

Bob
--
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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