Am 26.11.2016 um 17:30 schrieb Mike Horvath:
> On 11/26/2016 11:13 AM, Mike Horvath wrote:
>> How do you plot this horseshoe shape? Is the diagram plotted in CIE XYZ
>> or CIE xyY color space? How do you tell if a point is inside or outside
>> this curve?
>>
>> Mike
>>
> 
> I found this code.
> 
>
http://www.mathworks.com/matlabcentral/fileexchange/40640-computational-colour-science-using-matlab-2e/content/cieplot.m?requestedDomain=www.mathworks.com
> 
> 
> However, there is only x and y, so it ignores the third dimension.

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.

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