Color Vision 3: Color Map
Вставка
- Опубліковано 29 жов 2024
- The Color Map, or Chromaticity Diagram, tells us a lot about Color. How to specify a color, Dominant Wavelength, results of Mixing, Complements, color Gamut, and various standards for White. Third in a series about Color Vision.
I am a PhD. student in a Vision Science program and am studying Color vision. These videos are great. Thank you.
First rate presentations. They are a gold standard for teaching - very impressive. Just imagine if all other scientific disciplines had material like this on the net!
It's close. In writing part 2 there were just too many interesting features to fit in, so it expanded into part 3 with a few more details/ examples. Hope you found it useful.
This is without doubt this best series of videos on colour I have seen
Great videos Dr.Blackwell. Thank you for going to the trouble to share your knowledge, it's greatly appreciated, Robert.
Very pedagogical. Excellent.
These are great videos! Thank you so much C.B.! I really appreciate the knowledge sharing.
I appreciate it with your share! Excellent knowledge
Great video. One minor note: opposite colors are Complementary with an 'e', not Complimentary (as in praising one another).
Hi Dr. Blackwell, excellent videos! I have two questions: When a colour coordinate is given, x = and y = , so that two parties understand the actual colour, wouldn't the white light, say at C or D65 need to be stated so that both parties understand the colour? Another way of asking, I suppose, is a yellow sample under two different lighting setups has an exact x and y, but just the white light designation changes? Though I suppose having asked this, both yellows could be found under one white light type. The second question is when you say two colours on the diagram, with a straight line between them, the resulting colour is half way along the line, is this equal amounts of perceived light colours?
your work is solid Gold
I wish this videos were in HD. Thanks for them. Paul
I love your videos and how informative they are. Since I'm watching this on an RGB monitor, am I right in thinking that the blue-green region outside the RGB triangle in reality looks different than what I'm seeing on my monitor? Is there a way to get (print?) a CIE chromaticity diagram where all the colours are accurately represented?
I think so.
The CIE chormaticity diagram on this page has the colours about as accurate as you can get (rendered for sRGB colour-space)
You are correct that the colours outside the sRGB colourspace triangle (shown slightly brighter) have to be desaturated for display as they are out-of-gamut.
Great video! Thanks!
Why not use 520nm for Green? Wouldn't that define a more complete color space?
the projection it explains doesn't convince me. I mean, great simple way to let the concept sink, but what if a vector has a smaller module and it doesn't pierce the unit plan? Plus: luminance is treated as a side extra thing and I'd like to understand it more :( (just suggesting, great initiating videos!!)
This one is the same as the second part of the color matching one!
why X axis from 0 to 0.8 and which is units it?
On the 1931 chromaticity diagram x = X / (X+Y+Z) and y = Y / (X+Y+Z)
where XYZ are tristimulus values.
From the properties of the Xbar Ybar Zbar colour-matching functions, it falls out that the maximum value of x is about 0.75 (there isn't actually a hard cutoff as it depends how far into the infra-red you go, and the eye doesn't have a hard cutoff, just a rapidly decreasing sensitivity)
@andrewsteer1562 Hey I know OP posted 4 years ago and may or may not have seen your answer (also you commented 7 months ago, so idk if you'll see this) but I've had pretty much the same question for a while now and you just explained it super well, so thanks!
What meaning number in x and y axis
On the 1931 chromaticity diagram x = X / (X+Y+Z) and y = Y / (X+Y+Z)
where XYZ are CIE tristimulus values.
your work is solid Gold
Solid gold? Or equal parts red and green?