Difference between revisions of "Cubic Projection"
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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. | 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. | ||
| − | Four cube faces cover front, right, back and left, one the [[Zenith]] and one the [[Nadir]], each of them having | + | 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. |
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]]. | ||
[[Category:Glossary]] | [[Category:Glossary]] | ||
Revision as of 23:55, 29 July 2006
This 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 cubefaces 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.