Voxel
Voxel
Voxel (/ˈvɒksəl/, short for volumetric pixel or volume pixel) is a unit of graphic information that defines a point in three-dimensional space. Since a pixel (picture element) defines a point in two dimensions, the term voxel can be understood as referring to a pixel extended in three dimensions.
Etymology
The term voxel is a portmanteau of the words "volume" and "pixel", where pixel is itself a contraction of "picture element". The term was first used in computer graphics, and its first known mention in scientific literature was in a 1980 paper by Michael J. Drebin, Loren Carpenter, and Pat Hanrahan.
Definition
A voxel represents a value on a regular grid in three-dimensional space. As with pixels in a bitmap, voxels themselves do not typically have their position (their coordinates) explicitly encoded along with their values. Instead, the position of a voxel is inferred based upon its position relative to other voxels (i.e., its position in the data structure that makes up a single volumetric image).
Related Terms
- Pixel: A pixel is the smallest unit of a digital image or graphic that can be displayed and represented on a digital display device.
- Bitmap: A bitmap is a type of memory organization or image file format used to store digital images.
- Computer Graphics: Computer graphics are pictures and films created using computers. Usually, the term refers to computer-generated image data created with the help of specialized graphical hardware and software.
See Also
External links
- Medical encyclopedia article on Voxel
- Wikipedia's article - Voxel
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