Prado SA, Camas BJT, Laredo ML

Language: Spanish
References: 12
Page: 101-110
PDF size: 139.73 Kb.

ABSTRACT

Color perception is the complex capacity to perceive and discriminate different sources of light related to wave longitudes. Main color components are light wave longitudes, a process that includes three different psychological dimensions: saturation, considered the wave longitude purity, shade, being the common mining of light and brightness, which is the quantity of light produced by a specific source or the amount of light reflected from a surface. The process to combine different light wave longitudes in order to create new colors is named color additive mixture, a phenomenon which has a post image and successive contrast physical qualities in conditions of extreme fatigue after long light receptor stimulation in specific regions of the retinal surface. The specific effects of past experiences related to color perception is considered to elaborate the specific memory for colors.
There are several explanations about the color perception. The trichromic receptor theory holds that the color perception is coded according to three different types of retinal cone cells that selectively process short, medium and high lightwave longitudes. The opponent process theory suggests that there are neurological mechanisms in the ganglion retinal cells and parvocelular layers of the geniculate lateral nuclei with a specific pattern activity that identifies specific light waves and selectively increases or decreases the specific receptor stimulation for each color creating the color experience. Color perception defects are recognized as a recessive characteristic sex-linked genetically transmitted with a high incidence in the male gender. Besides those subjects who are not able to perceive any color known as monochromats, there are other color specific deficiencies to red, (tritanopia) green (deuteranopia) and blue (protanopia).

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