Editing Light field (section)

==Methods to create light fields==
In computer graphics, light fields are typically produced either by [[rendering (computer graphics)|rendering]] a [[3D model]] or by photographing a real scene. In either case, to produce a light field, views must be obtained for a large collection of viewpoints. Depending on the parameterization, this collection typically spans some portion of a line, circle, plane, sphere, or other shape, although unstructured collections are possible.<ref>Buehler 2001</ref>

Devices for capturing [[light-field photography|light fields photographically]] may include a moving handheld camera or a robotically controlled camera,<ref>Levoy 2002</ref> an arc of cameras (as in the [[bullet time]] effect used in ''[[The Matrix]]''), a dense array of cameras,<ref>Kanade 1998; Yang 2002; Wilburn 2005</ref> [[light-field camera|handheld camera]]s,<ref name=ng>[[Ren Ng|Ng]] 2005</ref><ref>Georgiev 2006; Marwah 2013</ref> microscopes,<ref>Levoy 2006</ref> or other optical system.<ref>Bolles 1987</ref>

The number of images in a light field depends on the application. A light field capture of [[Michelangelo]]'s statue of ''[[Night (Michelangelo)|Night]]''<ref>{{Cite web|title=A light field of Michelangelo's statue of Night|url=https://accademia.stanford.edu/mich/lightfield-of-night/|access-date=2022-02-08|website=accademia.stanford.edu}}</ref> contains 24,000 1.3-megapixel images, which is considered large as of 2022. For light field rendering to completely capture an opaque object, images must be taken of at least the front and back. Less obviously, for an object that lies astride the ''st'' plane, finely spaced images must be taken on the ''uv'' plane (in the two-plane parameterization shown above).

The number and arrangement of images in a light field, and the resolution of each image, are together called the "sampling" of the 4D light field.<ref>Chai (2000)</ref> Also of interest are the effects of occlusion,<ref>Durand (2005)</ref> lighting and reflection.<ref>Ramamoorthi (2006)</ref>