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A hogel (a portmanteau of the words ''holographic'' and ''element'') is a part of a light-field hologram, in particular a computer-generated one. In contrast to 2D pixels, hogels contain the direction and intensity of light rays from many perspectives, and is in essence what is referred to as a sub-aperture image in plenoptic imaging terms. Synthetic hogels are typically rendered through double-frustum, oblique slice & dice or polygonal/voxel ray-tracing/ray-casting. Research into efficient generation and compression of hogels may allow holographic displays to become more widely available. An array of hogels can be used to reconstruct a light-field by emitting light through a microlens array or by reflective/transmissive photo-polymer holograms. The term "hogel" was coined by Mark Lucente who first used it in his 1994 MIT Doctoral Thesis Dissertation.〔 See, for example, page 55 in ("Chapter 4: Diffraction-Specific Computation" ), or the ("Glossary of Terms and Abbreviations" in Appendix A ) on page 151.〕 More recent examples include a paper presented at the SMPTE 2nd Annual International Conference on Stereoscopic 3D for Media and Entertainment entitled "The First 20 Years of Holographic Video – and the Next 20", or in these recent book chapters: "Electronic Holography -- 20 Years of Interactive Spatial Imaging" in ''Handbook of Visual Display Technology '', and "Computational Display Holography" in ''Holographic Imaging''. ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「hogel」の詳細全文を読む スポンサード リンク
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