Paralaks: Pabidaan ralatan

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'''Paralaks''' (baasal matan kata [[Yunani Bahari]] ''παράλλαξις'' (parallaxis) nang artinya alternisasi) marupakan pamindahan atawa parbidaan dalam [[malihat andak]] sabuting ubjik lawan dua buting [[pandangan (astronomi)|sudut pandang]] nang balain wan diukur lawan sudut atawa semi-sudut kamiringan antara dua garis ngitu.<ref>{{cite dictionary | title=Parallax | quote=Mutual inclination of two lines meeting in an angle | encyclopedia=Shorter Oxford English Dictionary | date=1968}}</ref><ref name=oed>{{cite dictionary | encyclopedia=Oxford English Dictionary | date=1989 | edition=Second | title=Parallax | quote=''Astron.'' Apparent displacement, or difference in the apparent position, of an object, caused by actual change (or difference) of position of the point of observation; spec. the angular amount of such displacement or difference of position, being the angle contained between the two straight lines drawn to the object from the two different points of view, and constituting a measure of the distance of the object. | url=http://dictionary.oed.com/cgi/entry/50171114?single=1&query_type=word&queryword=parallax&first=1&max_to_show=10 }}</ref> Maraga [[perspektif (grafik)|perspektif]], ubjik nang taparak manampaiakan paralaks nang taganal pada ubjik nang tajauh amun diitihi matan andak nang balaian, jadi paralaks kawa dipakai gasan manantuakan jarak.
 
== Perspektif visual ==
[[File:The sun, street light and Parallax edit.jpg|thumb|right|In this photograph, the [[Sun]] is visible above the top of the [[streetlight]]. In the reflection on the water, the Sun appears in line with the streetlight because the [[virtual image]] is formed from a different viewing position.]]
 
As the eyes of humans and other animals are in different positions on the head, they present different views simultaneously. This is the basis of [[stereopsis]], the process by which the brain exploits the parallax due to the different views from the eye to gain depth perception and estimate distances to objects.<ref>{{Cite book | last1=Steinman | first1=Scott B. | last2=Garzia | first2=Ralph Philip | date=2000 | title=Foundations of Binocular Vision: A Clinical perspective | publisher=McGraw-Hill Professional | isbn=978-0-8385-2670-5 | pages=2–5 }}</ref> Animals also use ''motion parallax'', in which the animals (or just the head) move to gain different viewpoints. For example, [[pigeon]]s (whose eyes do not have overlapping fields of view and thus cannot use stereopsis) bob their heads up and down to see depth.<ref>{{harvnb|Steinman|Garzia|2000|loc=p. 180}}.</ref>
 
The motion parallax is exploited also in [[wiggle stereoscopy]], computer graphics which provide depth cues through viewpoint-shifting animation rather than through binocular vision.
 
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