Common pixel formats are binary, gray-scale, palettized, and full-color, where color depth determines the fidelity of the colors represented, and color space determines the range of color coverage (which is often less than the full range of human color vision). Each raster grid has a specified pixel format, the data type for each number.
For most images, this value is a visible color, but other measurements are possible, even numeric codes for qualitative categories. Raster or gridded data may be the result of a gridding procedure.Ī single numeric value is then stored for each pixel. The size of each square pixel, known as the resolution or support, is constant across the grid. In digital photography, the plane is the visual field as projected onto the image sensor in computer art, the plane is a virtual canvas in geographic information systems, the plane is a projection of the Earth's surface. The fundamental strategy underlying the raster data model is the tessellation of a plane, into a two-dimensional array of squares, each called a cell or pixel (from 'picture element').
