On 11/28/2016 4:24 AM, scott wrote:
>> Also, I'm more interested in the 3-dimensional solid than the 2D
>> chromaticity diagram.
>
> The 3D solid of the Yxy shape is just the 2D shape you linked to
> extruded upwards as a prism. That's why you don't normally see Yxy or
> Yuv shown in 3D - it doesn't give any benefit over the 2D shape.
>
>

I thought there was some tapering as the Y increases? This image 
suggests that is the case.

http://www.math.ubc.ca/~cass/courses/m309-03a/m309-projects/bajwa/images/cie_3d.gif

Mike

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