On 11/26/2016 5:41 PM, clipka wrote:
> Am 26.11.2016 um 22:31 schrieb Mike Horvath:
>
>>> The third dimension is Y, luminance, aka brightness.
>>>
>>> It has a lower bound of zero, but no natural upper bound, as light can
>>> be arbitrarily bright.
>>>
>>
>> Illuminant D65 seems to be quite popular. Might that not serve as an
>> upper bound?
>
> /Any/ illuminant can serve as an upper limit -- but the question is,
> does it make sense in the context? Popularity is not a criterium here.
>
> Unless you have a specific reason for chosing any particular whitepoint,
> the only one that stands out is whitepoint E (equal energy).
>
> Another candidate for an upper limit would be Y=1.
>

Well, I *think* the ColorMine formulas use D65 by default. So I will 
just stick with that.

Mike

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