> For example, your eye converts RGB in a way so that yellow essentially becomes a primary. Another is the eye perceives photons in a logarithmic fashion adding two colors and halving them doesn't make an average.
Coming from an audio background where we have the fletcher-munson noise curve, I'm really curious to learn more about how the eye perceives light. Does anyone have other sources for this, please?
Interesting, thanks for the links! The color vision link had a nice chart outlining the infrared to ultraviolet chart with sensitivity ratings.
Curious though, how serious of an impact would time of day have on this curve? If someone took the test in the early morning, would yellow be more striking/harsh than if they viewed it at night? Would blue be more striking after a day of saturated sunlight?
Edit: Blue and yellow are similarly placed on the chart, apparently accounting for the morning/night sensitivity
I’m totally speculating about this before googling anything, but I suspect that time of day alone is not a huge factor, other than right after waking you’ll have more blood in your eyes and everything’s reddish for a few minutes, but it goes away quickly.
Illuminant is a big factor in appearance, so time of day matters a lot in the sense that if the sun is the primary illuminant, it changes color based on the angle in the sky and atmospheric conditions.
It’s an interesting question, and hard to answer due to perception and adaptation - our system is really good at compensating for things like illuminant and brightness and “color surround” (background colors). We adapt pretty fast to changes in condition (think about how long it took ... before Covid ... to adapt after walking out of a midday movie in a theater), and we’re better at seeing relative color differentials than absolute colors, so the physiological perception of blue isn’t likely to change after a day of sunlight (I guess). But just the memory of the day’s colors or yesterday’s color might affect what you think you see...
Looking up Lab* color could be a good start, if you're unfamiliar- color being naturally three dimensional (eg RxGxB), LAB is a projection of color where L attempts to account for every color of a perceived lightness, and A and B account for another two dimensions (green-to-red and blue-to-yellow... you can read the wp page as well as I can). The goal being that a given distance in any direction anywhere in the volume have an equal perceptual difference to the eye, an aspect sorely missing from RGB (where eg 8bits/channel is overkill in some colors but can result in banding in others, as well as being cumbersome to process in, as GP mentioned)
Coming from an audio background where we have the fletcher-munson noise curve, I'm really curious to learn more about how the eye perceives light. Does anyone have other sources for this, please?