Cubic Projection

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[[image:big_ben_cubic.jpg|right|Cubic projection, source image courtesy Ben Kreunen]]
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{{Glossary|A subcase of the [[Rectilinear Projection]] used as the input source projection for some fully spherical panorama viewers.}}
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[[image:big ben cubic.jpg|right|Cubic projection, source image courtesy Ben Kreunen]]
  
This is a type of [[Projections|projection]] for mapping a portion of the surface of a sphere (or the whole sphere) to flat images. The images are arranged like the faces of a cube and are each one in the [[Rectilinear Projection]]. This cube is viewed from it's center.
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'''Cubic''' is a type of [[Projections|projection]] for mapping a portion of the surface of a sphere (or the whole sphere) to flat images. The images are arranged like the faces of a cube and are each one in the [[Rectilinear Projection]]. This cube is viewed from it's center.
  
Four cube faces cover front, right, back and left, one the [[Zenith]] and one the [[Nadir]], each of them having 90�x90� [[field of view]]. In each cube face all straight lines stay straight, hence it is very good for editing. See [[Extracting and inserting rectilinear Views]] on different possibilities how to extract cubefaces from an [[Equirectangular Projection|equirectangular]] image and inserting them again.
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Four cube faces cover front, right, back and left, one the [[zenith]] and one the [[nadir]], each of them having 90°x90° [[Field of View]]. In each cube face all straight lines stay straight, hence it is very good for editing. See [[extracting and inserting rectilinear Views]] on different possibilities how to extract cube faces from an [[Equirectangular Projection|equirectangular]] image and inserting them again.
  
 
Images in the Cubic projection are commonly used as the image source by several spherical [[Panorama Viewers|panorama viewers]], including [[SPi-V]] and [[Quicktime]].
 
Images in the Cubic projection are commonly used as the image source by several spherical [[Panorama Viewers|panorama viewers]], including [[SPi-V]] and [[Quicktime]].
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[[Category:Glossary]]
 
[[Category:Glossary]]

Latest revision as of 00:38, 18 November 2007

Cubic projection, source image courtesy Ben Kreunen

Cubic is a type of projection for mapping a portion of the surface of a sphere (or the whole sphere) to flat images. The images are arranged like the faces of a cube and are each one in the Rectilinear Projection. This cube is viewed from it's center.

Four cube faces cover front, right, back and left, one the zenith and one the nadir, each of them having 90°x90° Field of View. In each cube face all straight lines stay straight, hence it is very good for editing. See extracting and inserting rectilinear Views on different possibilities how to extract cube faces from an equirectangular image and inserting them again.

Images in the Cubic projection are commonly used as the image source by several spherical panorama viewers, including SPi-V and Quicktime.

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