Comment by nayuki
5 hours ago
I didn't learn much from reading this article. Questions linger in my mind, for example: What are the CIE XYZ coordinates of each colored square? What is the spectral distribution of each square? How were the colors chosen?
The Wikipedia article is far more informative, though I'm uncertain if read the full dpreview article due to ad-induced nausea.
https://en.wikipedia.org/wiki/ColorChecker
> What are the CIE XYZ coordinates of each colored square?
In the most expensive versions, they measure each individual patch, in case printing imperfections make the colours slightly different. And of course because you can’t get the exact same inks when a product is 50 years old!
> How were the colors chosen?
Skin and foliage; primary colours; greyscale; and miscellaneous.
They also make a 140 colour patch version - the “ColorChecker Digital SG” - that provides more coverage; 14 different skin tones instead of 2 for example!
You sound like you actually want to just generate them yourself using ArgyllCMS `targen` and `printtarg`.
I don't know about him but yes yes I do and you should want to, too! :^)
These aren't appropriate questions for the birthday party