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Topic: Color receptors

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	Color article - Color color (disambiguation) internationally fine structure The physics - What-Means.com (Site not responding. Last check: 2007-10-14)
		Color (US) (colour, internationally) is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view.
		In practice, the human color receptors will be saturated or even be damaged at extremely-high light intensities, but such behavior is not part of the CIE color space and neither is the changing color perception at low light levels (see: Kruithof curve).
		Structural color is a property of some surfaces that are scored with fine parallel lines, formed of many thin parallel layers, or otherwise composed of periodic microstructures on the scale of the color's wavelength, to make a diffraction grating.
	www.what-means.com /encyclopedia/Color (3785 words)

	Primary color - Wikipedia, the free encyclopedia
		A primary color (or colour) is a color that cannot be created by mixing other colors in the gamut of a given color space.
		Because of the response curves of the three different color receptors in the human eye, these colors are optimal in the sense that the largest range of colors (gamut) visible by humans can be generated by mixing light of these colors.
		Media that use reflected light and colorants to produce colors are using the subtractive color method of color mixing.
	en.wikipedia.org /wiki/Primary_color (699 words)

	Color - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-10-14)
		Color (American English) or colour (Commonwealth English) is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view.
		A dominant theory of the higher neural mechanisms of color vision proposes three opponent processes, or opponent channels, constructed out of the raw input from the cones: a red-green channel, a blue-yellow channel, and a fl-white ("luminance") channel.
		Again, compare variations on gray backgrounds—#7f7f7f, #5f5f5f & #9f9f9f—the eight RGB primaries are equidistant from #7f7f7f in a 3-d geometrical representation of RGB color space—a reminder of the importance of background color for color perception.
	encyclopedia.worldsearch.com /color.htm (4904 words)

	Color -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-14)
		Similarly, the intensity of a spectral color may alter its perception considerably; for example, a low-intensity orange-yellow is (An orange of low brightness and saturation) brown, and a low-intensity yellow-green is olive-green.
		The cross-section of the cylinder is a (A chart in which complementary colors (or their names) are arranged on opposite sides of a circle) color wheel, but instead of pure spectral colors, the edge consists of additive mixtures of red, green, and blue.
		The HSV color space is also sometimes referred to as the HSB (hue- (Chromatic purity: freedom from dilution with white and hence vividness of hue) saturation- (The location of a visual perception along the fl-to-white continuum) brightness) color space.
	www.absoluteastronomy.com /encyclopedia/c/co/color.htm (5410 words)

	COLOR
		These three colors of light are from the red, green, and blue parts of the spectrum.
		There are also color receptors (cones) that are particularly sensitive to the other primary colors of light.
		The primary colors for mixing paints, inks, and dyes, are not the same as for mixing light.
	home.att.net /~B-P.TRUSCIO/COLOR.htm (669 words)

	[No title]
		The retina of the human eye has three receptors for colored light: One type of receptor is most sensitive to red light, one to green light, and one to blue light.
		With these three color receptors we are able to perceive more than a million different shades of color.
		When the red and green receptors in your eye are stimulated, whether by a mixture of red and green light, or by yellow light alone, you will see the color yellow.
	www.phys.utk.edu /outreach_shadows.html (410 words)

	Design Notes: Color
		It is the teritory in the center of the color wheel that must be understood in ordeer to be able to control the brightness of colors.
		Color is said to be three dimensional because of it's three aspects: hue value and saturation.
		The farther from the center a color is, the brighter it is. Note that each hue is brightest at it's natural value: yellow is lightest and blue and violet the darkest.
	daphne.palomar.edu /design/color.html (1974 words)

	Color Blindness Check
		They are more sensitive than the color receptors, that is why we have poor color perception in the dark.
		Red-green color blindness is a result of a lack of red receptors.
		It is also possible to have the color receptors missing entirely, which would result in fl and white vision.
	www.geocities.com /Heartland/8833/coloreye.html (224 words)

	[No title] (Site not responding. Last check: 2007-10-14)
		retina of your eyes, there are 3 types of color receptors (cones) that are most sensitive to either red, blue or green.
		After looking at the flag with the strange colors, your receptors that are tired do not work as well.
		Therefore, the information from all of the different color receptors is not in balance.
	faculty.washington.edu /chudler/afterflag.html (172 words)

	HyperText Psychology - SENSES/Vision/color
		The trichromatic theory proposed by Helmholtz (1856) expanding on work by Thomas Young is a proposal that the eye must have three different types of receptors for color.
		The trichromatic theory assumes three, and only three types of color receptors, each more sensitive to a particualr color, i.e., red, or green, or blue.
		The study of color blindness is a good example of scientific method and the way in which theories are developed and tested.
	sun.science.wayne.edu /~wpoff/cor/sen/viscolor.html (281 words)

	Red, Green, and Blue Cones
		Nathans' ambitious plan to isolate the genes that coded for the three color receptor proteins depended on Wald's view that the genes all evolved from the same primordial ancestor.
		The only visual receptor protein that had been studied with any intensity at that time was bovine rhodopsin—from the rod cells of cows' eyes.
		Wald went on to propose that the receptor proteins in all these cones were built on the same plan as rhodopsin.
	www.hhmi.org /senses/b120.html (813 words)

	[No title] (Site not responding. Last check: 2007-10-14)
		When you stare at a particular color for too long, these receptors get "tired" or "fatigued." When you then look at the white background, the receptors that are tired do not work as well.
		Therefore, the information from all of the different color receptors is not in balance and you see the color "afterimages." You can see that you vision quickly returns to normal.
		In the second experiment when you follow the moving circle, your eyes are always moving.
	faculty.washington.edu /chudler/after.html (194 words)

	Color variant vision (Site not responding. Last check: 2007-10-14)
		I hope you found this section if you are interested in "color blindness" or "color defective vision." I hesitate to use this terminology because in some instances it is just plain wrong and in others not quite correct.
		In the section dealing with the trichromatic theory I explained that most people have three classes of cone receptors in their retina.
		It is believed that the photopigments that trichromats have in the outer segments of their receptors are not the same as those which anomalous trichromats have.
	www.yorku.ca /eye/cvv.htm (459 words)

	Which colors do cats see? : Cats
		Red, orange and brown colors appear to fall outside the cats color range and are most likely seen by them as dark to mid shades of gray.
		Gray receptors and color receptors, and Cat's have more grey receptors (they are sensitive to motion, detail and low light).
		If one only had color receptors, you would see the world as a blur of colors, and some people who are born with grey receptors only (a rare form of color blindness, see the world as we see fl and white movies and photos.
	www.answerbag.com /q_view.php/5369 (328 words)

	Are You Color Blind?
		They are more sensitive than the color receptors, that is why we have poor color
		Color blindness comes as a result of a lack of one or more of the types of color receptors.
		Another form of color blindness -- yellow-blue is the second most common form, but it's extremely rare.
	www.everwonder.com /david/colorblind.html (151 words)

	Exhibit Cross Reference - Color Reversal (Site not responding. Last check: 2007-10-14)
		COLOR REVERSAL shows the interesting effect that occurs when color receptors in the eye become fatigued.
		The opening in a rotating fl wheel reveals a picture of a red tree with a green background.
		If white follows the picture quickly, the user sees a green afterimage as the color receptors in the eye become fatigued (white minus red equals green).
	www.exploratorium.edu /xref/exhibits/color_reversal.html (95 words)

	Color receptors in TutorGig Encyclopedia (Site not responding. Last check: 2007-10-14)
		Cone cells are color sensitive, while the rod cells are brightness sensitive.
		Sporting Goods See all 9781 results in Color receptors...
		Kitchen & Housewares See all 5646 results in Color receptors...
	www.tutorgig.com /ed/Color_receptors (255 words)

	Bookshelf
		Why are there three types of cones (color receptors) in the retina, and not four or two?
		And why is purple the strangest of all colors?
		To find out, you'll just have to read the book.
	yudkowsky.net /bookshelf.html (2553 words)

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