Daniel Hulme wrote:
  > Human eyes can see far fewer than 2^24 colours. It is just that the
> representation we use is inefficient. We have more luminance resolution
> than chrominance resolution, but as you say, RGB does not reflect this.
> That is why I suggested using a different colour basis like YUV rather
> than simply pumping up the bits.

YUV would be great, but commodity hardware always uses 24-bit RGB for 
the final output.

So... the idea is to make 24-bit RGB images look as good as possible. 
The 256-shades-of-gray-even-at-24-bit-RGB problem is the most obvious 
way the issue can be seen.  Some dithering algorithm from a higher 
BPP-level or perhaps directly from POV's internal floating point color 
could very effectively compensate.

-Ryan

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