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Topic: Color perception


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In the News (Fri 19 Jul 19)

  
  COLOR
These three colors of light are from the red, green, and blue parts of the spectrum.
Color is also a physiological manifestation of the Human Eye.
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)

  
 Color (Stanford Encyclopedia of Philosophy)
Colors are perceiver-dependent but hybrid properties: to have a specific color is to have some intrinsic feature by virtue of which the object has the power to appear in a distinctive way (e.g., as in 4).
Colors are what fill in the outlines of these forms, they are the stuff out of which visual phenomena are built up; our visual world consists solely of differently formed colors; and objects, from the point of view of seeing them, that is, seen objects, are nothing other than colors of different kinds and forms.
Color science is a large field, but it is built around the way that colors appear and to the conditions under which colors can be perceived, and the causes which lead to the perception of colors.
plato.stanford.edu /entries/color   (16966 words)

  
 Color - Wikipedia, the free encyclopedia
Color (or colour, see spelling differences) is the visual perceptual property corresponding in humans to the categories called red, yellow, white, etc. Color derives from the spectrum of light (distribution of light energy versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors.
Since perception of color stems from the varying sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells.
Note that the colors depicted depend on the color space of the device on which you are viewing the image, and therefore may not be a strictly accurate representation of the color at a particular position, and especially not for monochromatic colors.
en.wikipedia.org /wiki/Color   (4137 words)

  
 Color Perception in 3000 Words   (Site not responding. Last check: 2007-10-21)
Colors on the end points of a diameter are complements; their hues cancel to yield the achromatic center.
The orientations of the opponent axes in color space and the consequent identities of the unique hues are not determined by color mixing and matching, or even by the structure of perceptual similarities among colors.
Even though the model is a model of color perception, it proposes principles of organization that lie rather deep within the physiology of the organism, remote from direct empirical test.
www.ucc.uconn.edu /~wwwphil/ccompan.html   (3314 words)

  
 Vision Aids for People with Impaired Color Perception
For this reason, color perception skills are almost always measured objectively by people’s abilities to perform color sorting and color matching tasks with accuracy and repeatability.
Personal computer color discrimination systems for graphic artists were found to be useful for many persons employed in the graphics art field who desired to continue their employment after incurring color perception problems.
In an anomalous trichromat, the color reception of the green cones is shifted towards the red end of the spectrum, to a greater or lesser degree; or the reception of the red cones is shifted towards the green part of the spectrum.
www.abledata.com /abledata_docs/Color_Blind.htm   (3439 words)

  
 Color vision - Wikipedia, the free encyclopedia
Color vision is the capacity of an organism or machine to distinguish objects based on the wavelengths (or frequencies) of the light they reflect or emit.
Perception of color is achieved in mammals through color receptors containing pigments with different spectral sensitivities.
Color perception mechanisms are highly dependent on evolutionary factors, of which the most prominent is thought to be satisfactory recognition of food sources.
en.wikipedia.org /wiki/Color_vision   (1525 words)

  
 Color Perception
They are light, which is the source of color; the object and how it reacts and responds to color; and the eye which is the perceiver of color (1).
And the second color system is that in which you can actually touch, these colors can be seen on the surface of objects or on the printed page(3).
It is the color of the sky and the ocean(4).
serendip.brynmawr.edu /biology/b103/f01/web2/dada.html   (1339 words)

  
 COLOR PERCEPTION
All other colors affect these receptors to varying degrees so that we are able to discern a great range of different color mixtures.
The wavelength of color light is measured in nanometers.
Colors such as magenta that are not in the spectrum produced by a prism can be produced by mixing colored illumination from two or more parts of the spectrum.
home.att.net /~RTRUSCIO/SPECTRUM.htm   (372 words)

  
 COLOR  PERCEPTION
A person who looks at color for a long period of time is going to experience retinal fatigue and the colors are not going to be perceived accurately any longer.
The conditions in which color is viewed greatly affect the perception of color.
This allows colors to be reproduced on a display by a mixture of red, green, and blue lights or on a printer by a mixture of cyan, magenta and yellow inks or pigments.
edromanguitars.com /tech/color.htm   (3798 words)

  
 ScienceDaily: Color Perception Is Not In The Eye Of The Beholder: It's In The Brain
Perception Of Color Contrast, Constancy Depends On Neural "Reflexes," Says Vision Theory (November 8, 2000) -- In the latest in a series of papers proposing that visual perception is an intricate collection of reflexes similar to the familiar 'knee jerk' response, Duke University Medical Center...
Visual perception -- Visual perception is one of the senses, consisting of the ability to detect light and interpret (see) it as the perception known as sight or naked eye vision.
Motion perception -- Motion perception is the process of inferring the speed and direction of objects that move in a visual scene given some visual input.
www.sciencedaily.com /releases/2005/10/051026082313.htm   (2207 words)

  
 Color Perception
But, while the best philosophical treatments of color of the 17th and 18th centuries (Locke's, for example) took current empirical science of color very seriously, philosophical work on color in much of the 19th and 20th centuries proceeded largely in ignorance of the vast body of subsequent developments in color science.
Since this time, there has been a flowering of empirically informed philosophical work on color: color has become a prominent topic in the field, is now discussed in articles in the best philosophical journals, conferences, and graduate seminars, and has been the subject of a number of new anthologies and monographs.
Despite the increased interest in topics at the intersection of philosophy and color science, there are a number of empirical phenomena surrounding color perception whose philosophical repercussions have been insufficiently acknowledged.
philosophy.ucsd.edu /events/colorPerception.html   (1009 words)

  
 Firelily Designs - Color Vision, Color Deficiency
The subject of color usage on the web comes up once in a while, so I thought it might be useful to pull together some basic issues for people who might be interested in color.
Color is another perceptual value; there is nothing about light at a wavelength of 700 nanometers that makes it red.
Color on color may seem (relatively) safe if you understand color deficiency, but there is one more catch.
www.firelily.com /opinions/color.html   (3912 words)

  
 How Do We See Colors?
Neurons are relatively slow computing machines, says Nathans, an HHMI investigator at the Johns Hopkins University School of Medicine.
Nathans became interested in how we see in color the day he heard of new discoveries about how we see in fl and white.
Rods and cones form an uneven mosaic within the retina, with rods generally outnumbering cones more than 10 to 1—except in the retina's center, or fovea.
www.hhmi.org /senses/b110.html   (690 words)

  
 handprint : color vision
Vision and color are at the heart of painting.
Here is the most comprehensive discussion for artists of color perception, color psychology, "color theory" and color mixing available online, and one of the most comprehensive available anywhere in any format.
 constraints on color vision (monochromatic, dichromatic & trichromatic vision)
www.handprint.com /HP/WCL/wcolor.html   (57 words)

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