Congratulations Craig for all this excellent material. I've seen all your color vision videos and they are equally informative and interesting, clearly explaining all the concepts with nice and simple examples, direct to the point. I've learned a lot from them and I truly appreciate this effort. Thanks and keep teaching!!
For many years vision scientists have been speculating about how we would perceive colors if, like some other animal species, we had more cone pigments. Tetrachromacy is theoretically possible in women. For background you could start with Mollon article, [Vision Res. Vol. 33, pp. 1495-1508, 1993] The light areas you mention are "neutral points." In trichromats it is at around (0.33, 0.33) on the CIE diagram. For tetras see vision dimensions in [Proc R Soc B, 2010,Jun 7;277(1688):1617-25].
Could you give an estimate what a spectrum for those tetrachromat women with the extra yellow cone, in ua-cam.com/video/gH84_XipdNs/v-deo.htmlm9s at 12:09 in this video would look like? I see a Dog has one 'light' band in the middle in the graph. Trichromats have 'light' bands at the cyan and yellow. At what places would tetrachromat people have the 'lighter'' bands? Would yellow be not a light band, but as pronounced as trichromats see red and blue? I mean no light whitish yellow trichromats perceive, but a 'thick' vibrant yellow in their case? So i mean, what would their spectrum look like in the graph?
From what I understand, human tetrachromats are simply more sensitive to subtle colour differences, especially in the yellow range. (for example, finding it much easier to identify a wasp due to its specific hue.)
I read that dolphins have the green cone, (rather than the red that is shown in your video, and rather than blue that fish have). Why does your video show red cone?
My reference for specifying the L cone is Gerald Jacobs, one of the pioneers in this very interesting subject. A number of other mammals are listed. "Evolution of Color Vision in Mammals." Phil Trans R Soc B (2009) 364:2957.
Congratulations Craig for all this excellent material. I've seen all your color vision videos and they are equally informative and interesting, clearly explaining all the concepts with nice and simple examples, direct to the point. I've learned a lot from them and I truly appreciate this effort. Thanks and keep teaching!!
For many years vision scientists have been speculating about how we would perceive colors if, like some other animal species, we had more cone pigments. Tetrachromacy is theoretically possible in women. For background you could start with Mollon article, [Vision Res. Vol. 33, pp. 1495-1508, 1993]
The light areas you mention are "neutral points." In trichromats it is at around (0.33, 0.33) on the CIE diagram. For tetras see vision dimensions in [Proc R Soc B, 2010,Jun 7;277(1688):1617-25].
i cannot thank you enough for this stimulating presentation
that put everything in my life in
perspective
These are excellent videos - thank you so much for uploading!
Really nice! I'm assigning it to my Physiological Psychology class.
Thank you. Fun subject. Glad you found it useful.
it is very useful for me thnks sir
Thanks for your video!
AMAZING, I LIKE UR VIDEOS.
Could you give an estimate what a spectrum for those tetrachromat women with the extra yellow cone, in ua-cam.com/video/gH84_XipdNs/v-deo.htmlm9s at 12:09 in this video would look like?
I see a Dog has one 'light' band in the middle in the graph.
Trichromats have 'light' bands at the cyan and yellow.
At what places would tetrachromat people have the 'lighter'' bands?
Would yellow be not a light band, but as pronounced as trichromats see red and blue?
I mean no light whitish yellow trichromats perceive, but a 'thick' vibrant yellow in their case?
So i mean, what would their spectrum look like in the graph?
From what I understand, human tetrachromats are simply more sensitive to subtle colour differences, especially in the yellow range. (for example, finding it much easier to identify a wasp due to its specific hue.)
I read that dolphins have the green cone, (rather than the red that is shown in your video, and rather than blue that fish have). Why does your video show red cone?
My reference for specifying the L cone is Gerald Jacobs, one of the pioneers in this very interesting subject. A number of other mammals are listed. "Evolution of Color Vision in Mammals." Phil Trans R Soc B (2009) 364:2957.