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Display Calibration Light Illusion Forums / Display Calibration /  
 

Cube Based Characterisation point spacing

 
Author argonaut
ZRO
#1 | Posted: 28 Feb 2023 22:43 
Looking at the percentage spacing of points used in Cube Based Characterisation, for Cube sizes 3 through 10, for Legal 10 bit (leaving out 0% and 100%):

3: 46.69%
4: 29.91%, 64.04%
5: 21.80%, 46.69%, 72.83%
6: 17.01%, 36.53%, 56.96%, 78.20%
7: 13.93%, 29.91%, 46.69%, 64.04%, 81.85%
8: 11.76%, 25.23%, 39.38%, 54.00%, 69.06%, 84.36%
9: 10.16%, 21.80%, 34.02%, 46.69%, 59.59%, 72.83%, 86.30%
10: 8.90%, 19.06%, 29.91%, 40.98%, 52.40%, 64.04%, 75.80%, 87.90%

It's clear the points could be more uniformly spaced, but aren't. What's the rationale for why they aren't?

Author Light Illusion


Male
#2 | Posted: 1 Mar 2023 00:55 
All I can say is the spacing is very deliberately not uniformly spaced.
But, as you can make any patch sets you want, you can use any spacing you want.

Steve

Author argonaut
ZRO
#3 | Posted: 1 Mar 2023 01:10 
Given that the spacing is the same, regardless of Gamut/EOTF, that seems like very little rationale.

Author Light Illusion


Male
#4 | Posted: 1 Mar 2023 01:25 
Please feel free to use any spacing you want.
That is one of the beauties of ColourSpace - you are not restricted to any given patch set for profiling.
As with most of ColourSpace operation, there are no set restrictions.

Steve

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Display Calibration Light Illusion Forums / Display Calibration /
 Cube Based Characterisation point spacing

 

 
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