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Created page with 'File:lighterstill.jpgright|frame *Date: [http://www.wikpedia.org/wiki/19th_Century 1838] ==Definitions== 1 : an optical instrument with two ...'
[[File:lighterstill.jpg]][[File:Stereoscopic.jpg|right|frame]]
*Date: [http://www.wikpedia.org/wiki/19th_Century 1838]
==Definitions==
1 : an optical instrument with [[two]] eyepieces for helping the [[observer]] to combine the [[images]] of two pictures taken from [[points of view]] a little way apart and thus to get the [[effect]] of solidity or [[depth]]
==Description==
'''Stereoscopy''' (also called stereoscopic or 3-D imaging) is any [[technique]] capable of recording [[three]]-[[dimension]]al visual [[information]] or creating the [[illusion]] of depth in an image.
[[Human]] [[vision]] uses several cues to determine [[relative]] depths in a [[perceived]] scene. Some of these cues are:
* [http://en.wikipedia.org/wiki/Stereopsis Stereopsis]
* [http://en.wikipedia.org/wiki/Accommodation_(eye) Accommodation of the eyeball] (eyeball [[focus]])
* ''Occlusion of one object by another''
* ''Subtended visual angle of an object of known size''
* ''Linear perspective (convergence of parallel edges)''
* ''Vertical position'' (objects higher in the scene generally tend to be perceived as further away)
* ''Haze, desaturation, and a shift to bluishness''
* ''Change in size of textured pattern detail''
All the above cues, with the exception of the first [[two]], are [[present]] in [[traditional]] [[two]]-[[dimensional]] images such as [[paintings]], [[photographs]], and television. Stereoscopy is the enhancement of the [[illusion]] of depth in a photograph, [[movie]], or other two-dimensional image by presenting a slightly [[different]] image to each eye, and thereby adding the first of these cues ([http://en.wikipedia.org/wiki/Stereopsis stereopsis]) as well. It is important to note that the second cue is still not [[satisfied]] and therefore the [[illusion]] of depth is incomplete.
Many 3D displays use this [[method]] to convey images. It was first invented by [http://en.wikipedia.org/wiki/Sir_Charles_Wheatstone Sir Charles Wheatstone] in 1838. Stereoscopy is used in [http://en.wikipedia.org/wiki/Photogrammetry photogrammetry] and also for [[entertainment]] through the production of stereograms. Stereoscopy is useful in viewing images rendered from large multi-[[dimensional]] [[data]] sets such as are produced by [[experimental]] data. Modern industrial [[three]] [[dimensional]] photography may use [http://en.wikipedia.org/wiki/3D_scanner 3D scanners] to detect and record 3 dimensional [[information]]. The three-dimensional depth [[information]] can be reconstructed from two images using a computer by [[corresponding]] the pixels in the left and right images. [http://en.wikipedia.org/wiki/Correspondence_problem Solving the Correspondence problem] in the field of [http://en.wikipedia.org/wiki/Computer_Vision Computer Vision] aims to create [[meaningful]] depth [[information]] from two images.
[[Traditional]] stereoscopic [[photography]] consists of creating a 3-D [[illusion]] starting from a pair of 2-D images. The easiest way to enhance [http://en.wikipedia.org/wiki/Depth_perception depth perception] in the [[brain]] is to provide the eyes of the viewer with two [[different]] images, [[representing]] two [[perspectives]] of the same object, with a minor deviation exactly [[equal]] to the [[perspectives]] that both eyes naturally receive in [http://en.wikipedia.org/wiki/Binocular_vision binocular vision]. If eyestrain and distortion are to be avoided, each of the two 2-D images preferably should be presented to each eye of the viewer so that any object at [[infinite]] distance seen by the viewer should be [[perceived]] by that eye while it is oriented straight ahead, the viewer's eyes being neither crossed nor diverging. When the picture contains no object at [[infinite]] distance, such as a [[horizon]] or a cloud, the pictures should be spaced correspondingly closer together.[http://en.wikipedia.org/wiki/Stereoscopic]
[[Category: Photography]]
*Date: [http://www.wikpedia.org/wiki/19th_Century 1838]
==Definitions==
1 : an optical instrument with [[two]] eyepieces for helping the [[observer]] to combine the [[images]] of two pictures taken from [[points of view]] a little way apart and thus to get the [[effect]] of solidity or [[depth]]
==Description==
'''Stereoscopy''' (also called stereoscopic or 3-D imaging) is any [[technique]] capable of recording [[three]]-[[dimension]]al visual [[information]] or creating the [[illusion]] of depth in an image.
[[Human]] [[vision]] uses several cues to determine [[relative]] depths in a [[perceived]] scene. Some of these cues are:
* [http://en.wikipedia.org/wiki/Stereopsis Stereopsis]
* [http://en.wikipedia.org/wiki/Accommodation_(eye) Accommodation of the eyeball] (eyeball [[focus]])
* ''Occlusion of one object by another''
* ''Subtended visual angle of an object of known size''
* ''Linear perspective (convergence of parallel edges)''
* ''Vertical position'' (objects higher in the scene generally tend to be perceived as further away)
* ''Haze, desaturation, and a shift to bluishness''
* ''Change in size of textured pattern detail''
All the above cues, with the exception of the first [[two]], are [[present]] in [[traditional]] [[two]]-[[dimensional]] images such as [[paintings]], [[photographs]], and television. Stereoscopy is the enhancement of the [[illusion]] of depth in a photograph, [[movie]], or other two-dimensional image by presenting a slightly [[different]] image to each eye, and thereby adding the first of these cues ([http://en.wikipedia.org/wiki/Stereopsis stereopsis]) as well. It is important to note that the second cue is still not [[satisfied]] and therefore the [[illusion]] of depth is incomplete.
Many 3D displays use this [[method]] to convey images. It was first invented by [http://en.wikipedia.org/wiki/Sir_Charles_Wheatstone Sir Charles Wheatstone] in 1838. Stereoscopy is used in [http://en.wikipedia.org/wiki/Photogrammetry photogrammetry] and also for [[entertainment]] through the production of stereograms. Stereoscopy is useful in viewing images rendered from large multi-[[dimensional]] [[data]] sets such as are produced by [[experimental]] data. Modern industrial [[three]] [[dimensional]] photography may use [http://en.wikipedia.org/wiki/3D_scanner 3D scanners] to detect and record 3 dimensional [[information]]. The three-dimensional depth [[information]] can be reconstructed from two images using a computer by [[corresponding]] the pixels in the left and right images. [http://en.wikipedia.org/wiki/Correspondence_problem Solving the Correspondence problem] in the field of [http://en.wikipedia.org/wiki/Computer_Vision Computer Vision] aims to create [[meaningful]] depth [[information]] from two images.
[[Traditional]] stereoscopic [[photography]] consists of creating a 3-D [[illusion]] starting from a pair of 2-D images. The easiest way to enhance [http://en.wikipedia.org/wiki/Depth_perception depth perception] in the [[brain]] is to provide the eyes of the viewer with two [[different]] images, [[representing]] two [[perspectives]] of the same object, with a minor deviation exactly [[equal]] to the [[perspectives]] that both eyes naturally receive in [http://en.wikipedia.org/wiki/Binocular_vision binocular vision]. If eyestrain and distortion are to be avoided, each of the two 2-D images preferably should be presented to each eye of the viewer so that any object at [[infinite]] distance seen by the viewer should be [[perceived]] by that eye while it is oriented straight ahead, the viewer's eyes being neither crossed nor diverging. When the picture contains no object at [[infinite]] distance, such as a [[horizon]] or a cloud, the pictures should be spaced correspondingly closer together.[http://en.wikipedia.org/wiki/Stereoscopic]
[[Category: Photography]]