One of the definitions is: 'Voxel is an image of a three-dimensional space region limited by given sizes, which has its own nodal point coordinates in an accepted coordinate system, its own form, its own state parameter that indicates its belonging to some modeled object, and has properties of modeled region.' This definition has the following advantage. For example, a cubic volumetric display might be able to show 512×512×512 (or about 134 million) voxels. Some volumetric displays use voxels to describe their resolution. Voxels are frequently used in the visualization and analysis of medical and scientific data (e.g. A direct consequence of this difference is that polygons can efficiently represent simple 3D structures with much empty or homogeneously filled space, while voxels excel at representing regularly sampled spaces that are non-homogeneously filled.

In contrast to pixels and voxels, polygons are often explicitly represented by the coordinates of their vertices (as points). Instead, rendering systems infer the position of a voxel based upon its position relative to other voxels (i.e., its position in the data structure that makes up a single volumetric image). coordinates) explicitly encoded with their values. As with pixels in a 2D bitmap, voxels themselves do not typically have their position (i.e. In 3D computer graphics, a voxel represents a value on a regular grid in three-dimensional space.

Raster calculation