So the opponent colours chart (say at 11:10) shows the eye's response to pure spectral colours. So when the eye sees pure spectral yellow (the situation like at 5:58) the R-G channel is neutral and the B-Y channel sees yellow. Very simple and clear. However, why does it work then the situation is like at 6:08 and the "yellow" light is in fact a combination of red and green? What would the behaviour of the R-G and Y-B channels be so that we see yellow? I think the graph at 11:10 would actually have two arrows instead of one, one at ~546 nm and the other at ~700 nm. The first will be R-G: green, Y-B: yellow. The other will be R-G: red, Y-B: yellow. Do the "red" and "green" somehow cancel each other out in this case?
Spectral colors can be distinguished from a mixing of other colors when illuminating a color image. For example, the almost spectral yellow from a sodium vapor lamp will make a color photo look monochrome. The same photo illuminated by a mixture of red and green light will reveal red, orange yellow and green.
At 9:10 it says there's no a combination of red + green that is perceivable by human. Isn't it a contraddiction? I mean, yellow is the combination of R+G
Yes, this is not clear to me. I think he is saying that yellow is not what we expect when mixing R+G. I was surprised when I learned R+G makes yellow. Almost everyone who has not studied color theory do not know how to make yellow.
Wonderful series. However, I don't get why the Red-Green sensation would not come from R-G cones only. Why is blue cone input required? Also, I would think that Lumin sensation should have input from all three cones - RGB, which is more intuitive since RGB makes white (or black in their absence)
I noticed you didnt point out where unique red is. I see there is a spot at the end where yellow dies out, but that is much more maroon/brick red then Unique red. So where is unique red?
My hearing is so bad that I couldn't actually distinguish the word after 'like',can somebody tell me what the centre surrounding organization is like?Sounds like 'a bowl's up'.
Angel, at the end of each video is a list of references for each subject, selected because they were particularly helpful. There is a broad literature about color, and it takes a while to find the useful material. Maybe we will see you in print soon.
When I spoke to Marshall last year, he said that the mantis shrimp’s style of vision might help it to process images very quickly without much contribution from its brain. That might be useful to a predator that uses some of the fastest strikes in the animal kingdom. But of course, that’s still a hypothesis. And there’s another baffling layer of complexity: the receptors that detect red to violet colours are connected to different nerves than the ones that detect UV, and both streams lead to different parts of the brain. The mantis shrimp didn’t just evolve an absurdly over-engineered way of seeing, it did it twice. Source: www.nationalgeographic.com/science/phenomena/2014/07/03/natures-most-amazing-eyes-just-got-a-bit-weirder/ When saying it has over-engineered what does he mean about that? 10000h and you are a expert? The more I learn the more I learn that I do not know? Do humans have an over-engineered brain with two halves? Not understanding and not knowing are two different things and if it is too complex, try to describe it to a 7year old and ask what they associate whit it? serendipity: the occurrence and development of events by chance in a happy or beneficial way.
This is so cleanly presented. I need sanity like this. The world does
So the opponent colours chart (say at 11:10) shows the eye's response to pure spectral colours. So when the eye sees pure spectral yellow (the situation like at 5:58) the R-G channel is neutral and the B-Y channel sees yellow. Very simple and clear.
However, why does it work then the situation is like at 6:08 and the "yellow" light is in fact a combination of red and green? What would the behaviour of the R-G and Y-B channels be so that we see yellow?
I think the graph at 11:10 would actually have two arrows instead of one, one at ~546 nm and the other at ~700 nm. The first will be R-G: green, Y-B: yellow. The other will be R-G: red, Y-B: yellow. Do the "red" and "green" somehow cancel each other out in this case?
Spectral colors can be distinguished from a mixing of other colors when illuminating a color image. For example, the almost spectral yellow from a sodium vapor lamp will make a color photo look monochrome. The same photo illuminated by a mixture of red and green light will reveal red, orange yellow and green.
At 9:10 it says there's no a combination of red + green that is perceivable by human. Isn't it a contraddiction? I mean, yellow is the combination of R+G
Yes, this is not clear to me. I think he is saying that yellow is not what we expect when mixing R+G. I was surprised when I learned R+G makes yellow. Almost everyone who has not studied color theory do not know how to make yellow.
Can you explain why Deutans and Protans see similar shades of color?
Wonderful series. However, I don't get why the Red-Green sensation would not come from R-G cones only. Why is blue cone input required? Also, I would think that Lumin sensation should have input from all three cones - RGB, which is more intuitive since RGB makes white (or black in their absence)
I noticed you didnt point out where unique red is. I see there is a spot at the end where yellow dies out, but that is much more maroon/brick red then Unique red. So where is unique red?
My hearing is so bad that I couldn't actually distinguish the word after 'like',can somebody tell me what the centre surrounding organization is like?Sounds like 'a bowl's up'.
@8:57 wouldn't a combo of blue and yellow be green?
That's what I used to think, but apparently not.
He's talking about additive color mixing of light, not subtractive color mixing of pigments.
A green bar produces a magenta bar after-image. Cyan bars would produce a red bar after-image.
What does he mean by saying the names are long set?
Thanks for the information you shared , actually I understand the concepts. thanks
Thanks, very good explained, great!!
Could I possibly get a list of you research articles? I would like to reference them in my research. Angel Perez
Angel, at the end of each video is a list of references for each subject, selected because they were particularly helpful. There is a broad literature about color, and it takes a while to find the useful material. Maybe we will see you in print soon.
So why can we not reproduce the full gamut of human vision using an LMS colour space?
Hi Andy, did you find the answer to this question? I have the same question.
Such a soothing voice :)
Welp, this is easily the most confusing video I've seen so far, but still well explained and fascinating!
pretty cool.
thank you
there is a mistake. this is the same as part 5.
When I spoke to Marshall last year, he said that the mantis shrimp’s style of vision might help it to process images very quickly without much contribution from its brain. That might be useful to a predator that uses some of the fastest strikes in the animal kingdom. But of course, that’s still a hypothesis.
And there’s another baffling layer of complexity: the receptors that detect red to violet colours are connected to different nerves than the ones that detect UV, and both streams lead to different parts of the brain. The mantis shrimp didn’t just evolve an absurdly over-engineered way of seeing, it did it twice.
Source:
www.nationalgeographic.com/science/phenomena/2014/07/03/natures-most-amazing-eyes-just-got-a-bit-weirder/
When saying it has over-engineered what does he mean about that?
10000h and you are a expert?
The more I learn the more I learn that I do not know?
Do humans have an over-engineered brain with two halves?
Not understanding and not knowing are two different things and if it is too complex, try to describe it to a 7year old and ask what they associate whit it?
serendipity:
the occurrence and development of events by chance in a happy or beneficial way.