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Comment by no_identd | Hacker News Reader

Y'all might want to read this:

(Implementation: https://github.com/nschloe/colorio )

And this (read the Appendix on the BACKLIGHT of the Sharp Quattron, and take a look at Figures 1.3, 3.5, 9.2, G.3!):

Note however, that all of this completely ignores the fact that humans seem capable of some form of HDR color fusion via binocular vision, as impressively demonstrated in this paper:

http://arxiv.org/abs/1703.04392

Given that many people seem to report slight differences in monochromatic color differentiating between eyes, we can speculate that binocular vision influences color perception in some way.

Edit:

See also my comment here: https://news.ycombinator.com/item?id=19983432

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My implementation from a few weeks ago https://observablehq.com/@jrus/cam16

(Make sure you watch for typos in your link.)

But frankly using CIECAM02 or CAM16 (or whatever) vs. CIELAB for doing gamut mapping is a relatively minor improvement in most cases. There can be serious issues when trying to convert RGB images to CMYK or similar for printing, especially hue shifts in the blue–purple region. But for converting colors from sRGB to a wider-gamut display there shouldn’t be any significant issue.

The big problem is that historically most browsers have done no color management of CSS colors. Looks like that is now changing, which is encouraging, whether or not the gamut mapping algorithm they use is state-of-the-art.

> ignores the fact that humans seem capable of some form of HDR color fusion

This seems largely irrelevant to the discussion in this thread.

>My implementation from a few weeks ago >https://observablehq.com/@jrus/cam16

Nice, thanks for sharing! You seem to work on a lot of stuff I find highly interesting! :) entirely off topic, but, you might find this of interest to your logarithmic spirals work:

https://link.springer.com/article/10.1007/s00004-015-0285-1

>But for converting colors from sRGB to a wider-gamut display there shouldn’t be any significant issue.

I agree, but I'd prefer it if eventually, we treated sRGB colors the same way we treat CGA colors. Especially due to the issues outlined in the other paper I linked. (Namely, that our 'red' subpixels ain't red, they're more orange-red, and that the 'green' ones ain't green either, they're more yellow-green. Really a shame Sharp messed up their tech in that regard by just using a standard back-light, it put a huge blemish in the quite sane idea of having yellow subpixels.)

But, at the moment, we don't even have Chrome properly supporting ICCv4 profiles, so, those dreams of the far future will have to wait.

>This seems largely irrelevant to the discussion in this thread.

>largely

Yes, I agree, I placed it there as a note of caution about:

1. Limitations in the works linked to;

2. The fact that color science doesn't seem to account for stereoblindness and monocular vs. binocular stimulii more often than not;

that's all.

That's also why I linked that PhD dissertation, which also goes beyond CAM16. I in fact neglected to mention some other limitations, namely, that it also doesn't fully factor in:

1. The works on color perception by Brian P. Schmidt¹ et al.: https://bps10.github.io/ (Note: It does factor it in /in part/)

2. More esoterically (by which I DON'T mean pseudoscientific.) the ones noticed by John Medeiros: https://www.youtube.com/watch?v=4Oj0hweYE00

¹ NOT the Brian P. Schmidt who won part of the 2011 Physics Nobel price

Edit: Almost entirely off-topic, but, I try to keep my thematically related Hacker News comments at least indirectly hyperlinked to each other, so, here, another color related comment:

https://news.ycombinator.com/item?id=20008969

Reply on news.ycombinator.com