Light field: Difference between revisions
Xinreality (talk | contribs) m Text replacement - "e.g.," to "for example" |
Xinreality (talk | contribs) No edit summary |
||
| Line 1: | Line 1: | ||
{{see also|Terms|Technical Terms}} | {{see also|Terms|Technical Terms}} | ||
A '''light field''' (also spelled '''lightfield''') is a fundamental concept in [[optics]] and [[computer graphics]] that describes the amount of [[light]] traveling in every direction through every point in [[space]].<ref name="LevoyHanrahan1996">Levoy, M., & Hanrahan, P. (1996). Light field rendering. ''Proceedings of the 23rd annual conference on Computer graphics and interactive techniques - SIGGRAPH '96'', | A '''light field''' (also spelled '''lightfield''') is a fundamental concept in [[optics]] and [[computer graphics]] that describes the amount of [[light]] traveling in every direction through every point in [[space]].<ref name="LevoyHanrahan1996">Levoy, M., & Hanrahan, P. (1996). Light field rendering. ''Proceedings of the 23rd annual conference on Computer graphics and interactive techniques - SIGGRAPH '96'', 31-42.</ref><ref name="Gortler1996">Gortler, S. J., Grzeszczuk, R., Szeliski, R., & Cohen, M. F. (1996). The Lumigraph. ''Proceedings of the 23rd annual conference on Computer graphics and interactive techniques - SIGGRAPH '96'', 43-54.</ref> Essentially, it's a vector function that represents the [[radiance]] of light rays at any position and direction within a given volume or area. Understanding and utilizing light fields is crucial for advancing [[virtual reality]] (VR) and [[augmented reality]] (AR) technologies, as it allows for the capture and reproduction of visual scenes with unprecedented realism, including effects like [[parallax]], [[reflection]]s, [[refraction]]s, and [[refocusing]] after capture, while also aiming to solve critical issues like the [[vergence-accommodation conflict]].<ref name="Ng2005">Ng, R. (2005). Digital Light Field Photography. ''Ph.D. Thesis, Stanford University''.</ref><ref name="Lanman2013">Lanman, D., & Luebke, D. (2013). Near-eye light field displays. ''ACM SIGGRAPH 2013 Talks'', 1-1.</ref> | ||
==History== | ==History== | ||
The concept of measuring light rays has early roots. [[Michael Faraday]] first speculated in 1846 in his lecture "Thoughts on Ray Vibrations" that light should be understood as a field, similar to the [[magnetic field]] he had studied.<ref name="Faraday1846">Faraday, M. (1846). Thoughts on Ray Vibrations. ''Philosophical Magazine'', S.3, Vol. 28, No. 188.</ref> The term "light field" (''svetovoe pole'' in Russian) was more formally defined by [[Andrey Gershun]] in a classic 1936 paper on the radiometric properties of light in three-dimensional space.<ref name="Gershun1936">Gershun, A. (1939). The Light Field. ''Journal of Mathematics and Physics'', 18(1-4), | The concept of measuring light rays has early roots. [[Michael Faraday]] first speculated in 1846 in his lecture "Thoughts on Ray Vibrations" that light should be understood as a field, similar to the [[magnetic field]] he had studied.<ref name="Faraday1846">Faraday, M. (1846). Thoughts on Ray Vibrations. ''Philosophical Magazine'', S.3, Vol. 28, No. 188.</ref> The term "light field" (''svetovoe pole'' in Russian) was more formally defined by [[Andrey Gershun]] in a classic 1936 paper on the radiometric properties of light in three-dimensional space.<ref name="Gershun1936">Gershun, A. (1939). The Light Field. ''Journal of Mathematics and Physics'', 18(1-4), 51-151. (English translation of 1936 Russian paper).</ref><ref name="WikiLF">[https://en.wikipedia.org/wiki/Light_field Wikipedia: Light field]</ref> | ||
In the context of [[computer vision]] and graphics, the concept was further developed with the introduction of the 7D [[plenoptic function]] by [[Edward Adelson|Adelson]] and [[James Bergen|Bergen]] in 1991.<ref name="AdelsonBergen1991">Adelson, E. H., & Bergen, J. R. (1991). The plenoptic function and the elements of early vision. In ''Computational Models of Visual Processing'' (pp. 3-20). MIT Press.</ref> This function describes all possible light rays, parameterized by 3D position (x, y, z), 2D direction (θ, φ), wavelength (λ), and time (t). | In the context of [[computer vision]] and graphics, the concept was further developed with the introduction of the 7D [[plenoptic function]] by [[Edward Adelson|Adelson]] and [[James Bergen|Bergen]] in 1991.<ref name="AdelsonBergen1991">Adelson, E. H., & Bergen, J. R. (1991). The plenoptic function and the elements of early vision. In ''Computational Models of Visual Processing'' (pp. 3-20). MIT Press.</ref> This function describes all possible light rays, parameterized by 3D position (x, y, z), 2D direction (θ, φ), wavelength (λ), and time (t). | ||