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What is Color?
Nov 22, 2022 20:08:01 #
burkphoto wrote:
There is that. Today we have to deal with LED and CFL and tubular fluorescents, in a dizzying range of color temperatures and spectral profiles, plus incandescent and daylight sources, with all of the resulting effects those present. Metamerism is a recurring problem when light sources change from night to day or just morning to midday to afternoon. It's a wonder anyone is happy with the colors they choose.
I need to paint (touch-up) some window woodwork.
How many varieties of "woodwork white" are there?
Forced into bringing home a bunch of color swatches?
re: happy with... A whole painted wall will look totally different that a swatch.
Nov 22, 2022 20:09:49 #
Purple haze all in my eyes, uhh
Don't know if it's day or night
You got me blowin', blowin' my mind
Is it tomorrow or just the end of time?
Don't know if it's day or night
You got me blowin', blowin' my mind
Is it tomorrow or just the end of time?
Nov 22, 2022 20:14:12 #
CHG_CANON wrote:
Purple haze all in my eyes, uhh
Don't know if it's day or night
You got me blowin', blowin' my mind
Is it tomorrow or just the end of time?
Don't know if it's day or night
You got me blowin', blowin' my mind
Is it tomorrow or just the end of time?
Well, there is that...
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Nov 22, 2022 20:55:57 #
jaymatt wrote:
A better question: What is ‘is?" 
Que sera sera ...
What will be is unlimited.
What was is waaaaaay long term.
But what is ultra nano short lived.
Nov 22, 2022 20:57:23 #
Martys wrote:
Unrelated, but:
I've read that women's eyes have better color recognition than mens.
I've read that women's eyes have better color recognition than mens.
Yes, you read it ... in this thread. Most very excellent power of recall there !
Nov 22, 2022 23:59:05 #
Wyantry
Loc: SW Colorado
Longshadow wrote:
I thought they were uncalibrated eyeballs. 
I thought they were uncalibrated eyeballs. Or uncalibrated intellects?
Nov 23, 2022 00:45:36 #
Wyantry
Loc: SW Colorado
Doyle Thomas wrote:
What is Color? br br As most Photographers know c... (show quote)
I have to take exception to your statement about non-crystalline (amorphous) materials and their reaction to transmittance or reflection of “light” radiation.
Amorphous materials (e.g. glass) reflect from a SURFACE that is non-crystalline.
An amorphous material’s surface may reflect a portion of ALL of the visible wavelengths that impinge upon its surface. This is “first-surface reflection”. An example may be observed in the slight “double-image” seen when viewing a “back-reflectorized” material — like a standard mirror.
Reflection of various wavelengths is directly related to the chemistry of the irradiated substance and is explainable at the atomic-scale by Crystal Field Transitions and atomic electron-orbital filling, exciting, and emission of photons.
An article that explains light reflection based upon Molecular Chemistry and Crystal Field Transitions is: https://cosweb1.fau.edu/~warburton/Fall2019/GLY4200C_F19/MINCOLOR.htm
An article that explains some of the human visual perception is:
https://www.fourmilab.ch/documents/specrend/
An article that explains some of the properties (and uses) of visible light in material (mineral) identification is:
https://www2.tulane.edu/~sanelson/eens211/proplight.htm
An article that discusses light in relation to (mostly biological) materials is:
http://www.ijirset.com/upload/2016/november/58_22_Relationship.pdf
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Nov 23, 2022 07:56:30 #
burkphoto wrote:
See my post, above. You are correct.
There is an inverse relation between perception of color and perception of smell, too- this is true between all animals and not just differences between men and women.
Nov 23, 2022 08:04:37 #
fuminous wrote:
There is an inverse relation between perception of color and perception of smell, too- this is true between all animals and not just differences between men and women.
So the more I see, the less I smell?
That doesn't sound right......
Nov 23, 2022 08:10:24 #
For those with unbridled curiosity on this topic, may I suggest: Goethe's (yeah, that Goethe- Johann Wolfgang von) "Theory of Colours" from the early 1800's. Using intellect, reason, first-hand experimentation and a Poet's perception, he made some very interesting discoveries... if not discoveries, then realizations of the conditions of color as perceived and presumed by humans. Understand, other than prisms and concave/vex discs, Goethe had no appliances to assist in his research. An amazing production....
Nov 23, 2022 08:14:53 #
Longshadow wrote:
So the more I see, the less I smell?
That doesn't sound right......
That doesn't sound right......
Yup... we have thousands of "dead" chromosomes in our DNA and research suggests many are (were) smell related. As our color perception improved, our odor detection declined. Most animals are far and away better smellers than humans, but humans have, comparatively, superior color detection.
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Nov 23, 2022 08:20:10 #
fuminous wrote:
Yup... we have thousands of "dead" chromosomes in our DNA and research suggests many are (were) smell related. As our color perception improved, our odor detection declined. Most animals are far and away better smellers than humans, but humans have, comparatively, superior color detection.
Whew, I was hoping I didn't stink.
Nov 23, 2022 13:49:07 #
Longshadow wrote:
So the more I see, the less I smell?
That doesn't sound right......
That doesn't sound right......
Not "you in the moment" vs "you in some other moment". Its about species vs species. Its a claim that degree of color blindness correlates to an improved sense of smell, species to species.
Regardless, the idea is disproven by common species we routinely encounter ... frinstintz dogs vs pollenator insects.
Nov 23, 2022 17:35:21 #
Nov 23, 2022 17:36:49 #
Color is a range of frequencies in the visible portion of the electromagnetic spectrum. Green light is a range of frequencies. It matters not whether it is perceived or measured in any way. It is green light unless and until some agent changes its frequency (color).
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