Light field: Difference between revisions
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A '''light field''' is an area or volume of light treated as a set of [[ray]]s, where each ray has a magnitude and angle. A light field is the set of light rays flowing through a point, surface or volume from every direction. It approximately represents how light travels in physical space from a [[ray optics]] perspective. It is also known as a radiance field. | |||
A light field is a | |||
A light field can be | A light field can be displayed using a [[light field display]], which is a type of [[multifocal display]]. | ||
A light field | It is possible to record a light field using a [[light field camera]], such as a camera from [[Lytro]]. | ||
[[Category: | |||
"Lightfield", "plenoptic", and "[[integral imaging]]" are all the same. | |||
A light field can be represented using a [[plenoptic function]], which is a 5 dimensional function. A light field can be represented in 4 dimensions using the two-plane method.<ref name="k782">{{cite conference | last=Gortler | first=Steven J. | last2=Grzeszczuk | first2=Radek | last3=Szeliski | first3=Richard | last4=Cohen | first4=Michael F. | title=The lumigraph | publisher=ACM | date=1996 | isbn=978-0-89791-746-9 | doi=10.1145/237170.237200 | page=43–54}}</ref> | |||
Light fields are useful for 3D because the largest or second largest factor that determines focus is the angle of rays coming into a human eye. | |||
==Representation== | |||
There are multiple ways to represent a light field using data. A method is the two-plane method. | |||
A light field can be black and white or full color. | |||
Light fields can be represented using euclidean geometry, instead of having to use a relativistic understanding. | |||
==History== | |||
Leonardo da Vinci explored the idea of a scene consisting of light rays of various angles.<ref>http://lightfield-forum.com/2012/08/lightfield-history-who-invented-the-concept-of-the-light-field/</ref> | |||
The term "light field" was used by A. Gershun in a paper. | |||
Work in computational light fields was done by [[Marc Levoy]] and [[Pat Hanrahan]].<ref name="d565">{{cite web | title=Light Field Rendering | website= | |||
Computer Graphics at Stanford University | |||
| url=http://www-graphics.stanford.edu/papers/light/ | ref={{sfnref | | |||
Computer Graphics at Stanford University | |||
}} | access-date=2024-07-13}}</ref> | |||
Light field rendering research has focused on novel viewpoints for existing data, but largely for 2D screens.<ref>https://pages.cs.wisc.edu/~dyer/cs534/papers/levoy-light-field-tutorial.pdf</ref> | |||
==See also== | |||
* [[Photic field]] | |||
* [[Lumigraph]] | |||
==References== | |||
{{Creative Commons text attribution notice|cc=zeroXVRWiki|url=https://www.xvrwiki.org/wiki/Light_field}} | |||
{{Reflist}} | |||
[[Category:Optics]] | |||
[[Category:Rendering]] | |||
[[Category:Display]] | |||
[[Category:Light field]] | |||
[[Category:3D data types]] | |||
Revision as of 16:20, 28 August 2024
A light field is an area or volume of light treated as a set of rays, where each ray has a magnitude and angle. A light field is the set of light rays flowing through a point, surface or volume from every direction. It approximately represents how light travels in physical space from a ray optics perspective. It is also known as a radiance field.
A light field can be displayed using a light field display, which is a type of multifocal display.
It is possible to record a light field using a light field camera, such as a camera from Lytro.
"Lightfield", "plenoptic", and "integral imaging" are all the same.
A light field can be represented using a plenoptic function, which is a 5 dimensional function. A light field can be represented in 4 dimensions using the two-plane method.[1]
Light fields are useful for 3D because the largest or second largest factor that determines focus is the angle of rays coming into a human eye.
Representation
There are multiple ways to represent a light field using data. A method is the two-plane method.
A light field can be black and white or full color.
Light fields can be represented using euclidean geometry, instead of having to use a relativistic understanding.
History
Leonardo da Vinci explored the idea of a scene consisting of light rays of various angles.[2]
The term "light field" was used by A. Gershun in a paper.
Work in computational light fields was done by Marc Levoy and Pat Hanrahan.[3]
Light field rendering research has focused on novel viewpoints for existing data, but largely for 2D screens.[4]
See also
References
This page uses XVRWiki's article text.