digital image

All Sources -
Updated Media sources (1) About content Print Topic Share Topic
views updated

digital image In remote sensing, an image in which the continuous variation in the scene being sensed is converted to discrete variation in the form of a finite range of integer values (pixels) each assigned a digital number. See also ANALOGUE IMAGE.

views updated

digital image An image consisting of data (specifically a set of elements) defined on an n-dimensional regular grid that has the potential for display. These elements are referred to as pixels. The pixels in different images may represent a variety of types of information, such as temperature, pressure, velocity, terrain height, or tissue density. The regular grid is frequently over a two-dimensional space but can be three-dimensional, and even four-dimensional if sampling over time is also included. See also image processing.