On 3/25/2017 5:21 AM, clipka wrote:
> Am 25.03.2017 um 09:19 schrieb Mike Horvath:
>> The visible gamut under D65 illumination mapped to spherical CIELCHuv
>> coordinates.
>
> You seem to be interpreting L as a polar coordinate, which is rather
> unconventional -- and as a matter of fact doesn't make much sense, since
> it causes all grey tones to collapse into the center.
>
> The official CIE LCh colout space is cylindrical in nature, not
> spherical (though the visible gamut under D65 might take on a somewhat
> spherical shape).
>

Yes, I know. Adding a bit to the beginning of the radius creates a hole 
that keeps the gray values from collapsing.


Mike

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