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DEPTH PERCEPTION#0803/ 2003
(  Satoshi Kinoshita )
| Series: | Paintings: Landscape | | Medium: | Acrylic on non-stretched canvas | | Size (inches): | 100 x 49 (approximate) | | Size (mm): | 2540 x 1245 (approximate) | | Catalog #: | PA_020 | | Description: | Signed, titled, date, copyright in magic ink on the reverse.
depth perception: The ability to judge the distance of objects and the spatial relationship of objects at different distances.
-Merriam-Webster's Online Dictionary, 10th Edition
depth perception: The ability to perceive spatial relationships, especially distances between objects, in three dimensions.
-The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Depth perception:
Depth perception is the visual ability to perceive the world in three dimensions. It is a trait common to many higher animals. Depth perception allows the beholder to accurately gauge the distance to an object.
Depth perception is achieved through a variety of mechanisms:
* Binocular vision/Parallax - By using two images of the same scene taken from slightly different angles, it is possible to triangulate the distance to an object with a high degree of accuracy. This is the major mechanism for depth perception.
* Color vision - Correct interpretation of color, and especially lighting cues, allows the beholder to determine the shape of objects.
* Perspective - The property of parallel lines converging at infinity allows us to reconstruct the relative distance of two parts of an object, or of landscape features.
* Relative size - An automobile that is close to us seems larger than one that is far away; our visual system exploits the relative size of similar (or familiar) objects to judge distance.
* Distance fog - Due to light scattering, objects that are a great distance away seem hazier to the eye; the visual system is attuned to this effect.
* Occlusion - Occlusion (blocking the sight) of objects by other objects is a clue, albeit a weak one, for judging relative distance. It only allows the beholder to create a "ranking" of nearness, and does not give any insight as to actual distances. In the absence of color vision (as at night) or binocular vision (as with one-eyed creatures - test it!) occlusion often serves as the method of last resort for providing rudimentary depth perception.
These functions are carried out automatically by the visual cortex; however, they are still a sort of guesswork by the brain, and so the beholder may fall victim to optical illusions that result in mistakes in depth perception.
See also: visual perception
-Wikipedia, the Free Encyclopedia
visual perception:
Visual perception or seeing 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. Vision has a specific sensory system.
There is disagreement as to whether or not this constitutes one, two or even three distinct senses. Some people make a distinction between "black and white" vision and the perception of colour, and others point out that rod vision uses different physical detectors on the retina from cone vision. Some argue that the perception of depth also constitutes a sense, but others argue that this is really cognition (that is, post-sensory) function derived from having stereoscopic vision (two eyes) and is not a sensory perception as such.
The eye is the light-sensitive organ that is the first component of the sensory system. The eye's retina performs the first stages of visual perception processing, with the remaining stages of visual perception occurring in the optic nerve and the visual cortex of the brain.
Types of visual perception:
* Color vision
* Black and white vision
See also:
* contrast
* phi phenomenon
* optical illusions
* color and color vision
* peripheral vision
* flicker fusion and the persistence of vision
* color blindness
* blindsight
* brightness and contrast
* binocular vision and depth perception
* consciousness and visual qualia
* optometry
* phosphenes
* pattern recognition and computer vision
* primary sensory areas
* neuroscience and cognitive science
* Visual perception in dreams
* optic flow
References:
* Rudolph Arnheim (1954). Art and Visual Perception: A Psychology of the Creative Eye. Berkeley: University of California Press.
-Wikipedia, the Free Encyclopedia
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