Bitmap
Bitmap
Bitmap (pronunciation: /ˈbɪtˌmæp/), also known as a raster graphic, is a data structure representing a grid of pixels, or points of color, on a computer monitor, paper, or other display device. The color of each pixel is individually defined; images in the RGB color system, for example, often consist of colored pixels defined by three bytes—one byte each for red, green, and blue. Less colorful images may be stored in smaller bitmaps.
Etymology
The term "bitmap" originates from the computer programming terminology, meaning a map of bits or a spatially mapped array of bits. This word is derived from the words "bit", referring to a binary digit, and "map", indicating a spatially correlated set of bits.
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.
- Raster graphics: Raster graphics are digital images created or captured (for example, by scanning in a photo) as a set of samples of a given space.
- Vector graphics: Unlike bitmaps, vector graphics are not based on pixel patterns, but instead use mathematical formulas to draw lines and curves that can be combined to create an image from geometric objects such as points, lines, curves, and polygons.
- Image file formats: Bitmap is a type of image file format that stores digital images as a grid of pixels, in both monochrome and color, in various color depths, and optionally with data compression, alpha channels, and color profiles.
External links
- Medical encyclopedia article on Bitmap
- Wikipedia's article - Bitmap
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