Hi all,
This is my first post to this mailing list so please forgive me any ignorance
of past discussions.
I'm using Argyll for calculating the colour gamut volume of displays, both in
absolute terms and the intersection with e.g. sRGB and BT.2020. The results
agree well with other volume calculation methods, but only if the sampled
colours are on the RGB cube surface. ICC profile quality in terms of max,
average, and RMS errors is also higher than body-centric sampling for the
particular displays that I’m measuring, and the number of samples can be
reduced too. 98 samples were sufficient to reach 95% of the convergence value
even for a strongly concave hull. Some results are here:
http://www.den.se/idw18/
targen doesn’t have any option of producing target colours evenly distributed
on the RGB cube surfaces, so I have to make the ti1 and X3D files manually.
Would it be possible to include also surface sampling in the next version of
targen? The number of colours per face would be n x n, where n is an odd
positive integer, and the total number of unique samples is 6n2-12n+8. From a
measurement point of view, sorting the patches by increasing (predicted)
luminance would be helpful but the ti3 output must be in the order of patch
generation. See attached example – this file was manually edited.
Best regards,
Johan
Attachment:
602.ti1
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