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颜色感知觉中的一个未解之谜
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颜色感知觉中的一个未解之谜
An Unsolved Puzzle in Color Perception
吴全丰 (Charles Q. Wu)
In my previous blog “An Unsolved Puzzle in Sound/Music Perception”, we have encountered the issue of pitch circularity. In color perception, as a matter of fact, we have a similar, if not completely identical, puzzle -- that is, the issue of hue circularity.
Physically, the “visible” (to the human eye) electromagnetic spectrum is a linear dimension, approximately ranging from 390 to 750 nm, as illustrated in Figure 1. Perceptually, however, the hues experienced by humans can be arranged in a circular manner, as illustrated in Figure 2. Doubtlessly, the transformation from a physical linear dimension to a perceptual circular variable is accomplished in the human brain. What is the brain or neural mechanism responsible for this transformation? -- This is still an unsolved puzzle in color science and neuroscience!
Believe it or not, Sir Isaac Newton is the first to notice the parallel between pitch circularity in sound perception and hue circularity in color perception. Figure 3 is taken from his book “Optics” -- as you can see, he arranged seven sounds (do-re-mi-fa-so-la-ti) and his seven primary colors on the same circle. Figure 4 is a modern, colored version of Newton's color circle.
https://m.sciencenet.cn/blog-322380-578831.html
上一篇：My book reviews on Amazon
下一篇：弗朗西斯·克里克 (Francis Crick) 对神经科学的贡献
An Unsolved Puzzle in Color Perception
吴全丰 (Charles Q. Wu)
In my previous blog “An Unsolved Puzzle in Sound/Music Perception”, we have encountered the issue of pitch circularity. In color perception, as a matter of fact, we have a similar, if not completely identical, puzzle -- that is, the issue of hue circularity.
Physically, the “visible” (to the human eye) electromagnetic spectrum is a linear dimension, approximately ranging from 390 to 750 nm, as illustrated in Figure 1. Perceptually, however, the hues experienced by humans can be arranged in a circular manner, as illustrated in Figure 2. Doubtlessly, the transformation from a physical linear dimension to a perceptual circular variable is accomplished in the human brain. What is the brain or neural mechanism responsible for this transformation? -- This is still an unsolved puzzle in color science and neuroscience!
Believe it or not, Sir Isaac Newton is the first to notice the parallel between pitch circularity in sound perception and hue circularity in color perception. Figure 3 is taken from his book “Optics” -- as you can see, he arranged seven sounds (do-re-mi-fa-so-la-ti) and his seven primary colors on the same circle. Figure 4 is a modern, colored version of Newton's color circle.
Figure 1: Physical Spectrum
Figure 2. CIE color map (colors are arranged in a semi-circular manner)
Figure 3: Newton's original color circle
Figure 4: A modern, colored version of Newton's color circle
https://m.sciencenet.cn/blog-322380-578831.html
上一篇：My book reviews on Amazon
下一篇：弗朗西斯·克里克 (Francis Crick) 对神经科学的贡献
