<P> In computing, a bitmap is a mapping from some domain (for example, a range of integers) to bits (values which are zeros and ones). It is also called a bit array or bitmap index . </P> <P> In computer graphics, when the domain is a rectangle (indexed by two coordinates) a bitmap gives a way to store a binary image, that is, an image in which each pixel is either black or white (or any two colors). </P> <P> The more general term pixmap refers to a map of pixels, where each one may store more than two colors, thus using more than one bit per pixel . Often bitmap is used for this as well . In some contexts, the term bitmap implies one bit per pixel, while pixmap is used for images with multiple bits per pixel . </P> <P> A bitmap is a type of memory organization or image file format used to store digital images . The term bitmap comes from the computer programming terminology, meaning just a map of bits, a spatially mapped array of bits . Now, along with pixmap, it commonly refers to the similar concept of a spatially mapped array of pixels . Raster images in general may be referred to as bitmaps or pixmaps, whether synthetic or photographic, in files or memory . </P>

What small points make up a bitmap image