On 11/29/2016 7:52 AM, scott wrote:
> The "basis" of most colour spaces is XYZ. XYZ defines a colour exactly
> (in terms of human perception) with just three numbers. The numbers are
> linear in terms of physical power, so if you have two light sources in
> very close proximity, you can simply add the two XYZ values to get the
> resulting colour. What this means though is that doubling XYZ does not
> give a perceived brightness twice as bright. Note there is no dependency
> on any "white point", the three numbers alone are enough.

The LAB > XYZ > RGB conversion algorithms I am using simply don't 
*function* without setting a white point, though.

http://colormine.org/

Mike

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