John, thank you for the insight about "plaid". This is exactly the point. Experiments the CIE devised are comparative. They dispensed with the qualia—thew it out—and built a model based on population sampling. Thanks to this model, we have a useful concept of dE. You don't want to upend this and claim that because you have a dE you have a definitive claim on a countable qualia. Absurd. Trivial cases violate the model. Try closing your eyes: thought experiment done! On Mon, Jan 6, 2020 at 3:07 PM John Gnaegy via colorsync-users < colorsync-users@lists.apple.com> wrote:
#SomeHugeNumberOfColors
"#SomeHugeNumberOfRGBTriplets" is more accurately what I meant, if you're defining "color" as a user's perception of light stimuli. But then what's the name for what a spectrophotometer reads? Is that a "color"? Maybe it's a set of measured values.
At any rate, you've got:
1) the number of RGB triplets (let's just stick with RGB for now) so 8 bit: ((2 to the power of 8) to the power of 3) = 16,777,216 10 bit: ((2 to the 10th) to the 3rd) = 1,073,741,824 12 bit: ((2 to the 12th) to the 3rd) = 68,719,476,736 2) the number of different measured values your spectrophotometer will will read when pointed at your display as it's trying to display those triplets. How many? It depends on both your display and your spectro. 3) the number of individually perceptible colors you could perceive given any of those large sets of inputs, for a given environment, meaning for a given light level and color surround. Your eye (well, your brain) adapts constantly for your surround.
And it all seems pretty unnecessary and over the top until you're trying to make a nice smooth gradient between two similar colors. 10 bit vs 8 bit gives you four times as many bands...and although 4 is better than 1, it can still be obviously noticeable depending on the two colors you're trying to go between. Same with 12 vs 10 I'd think, 16 is better than 4 but it still might not be enough to get an imperceptibly smooth gradient between two similar colors.
So is there anywhere you can see a nice, smooth, imperceptibly changing gradient? Turns out yeah. The sky. Go out and look at how smoothly the sky transitions from one color overhead to a wildly different color at the horizon (I mean without clouds). It's pretty amazing. And it kind of makes me want to never look at a display again.
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