1973, in computer jargon, from bit (n.2) + chart. Actually, a map of bits.
a picture represented as a two dimensional variety of brightness values for pixels
A bitmap (or raster graphic) is a digital picture composed of a matrix of dots. When seen at 100per cent, each dot corresponds to an individual pixel on a display. In a standard bitmap picture, each dot could be assigned an alternative color. Collectively, these dots enables you to express any sort of rectangular image. There are several various bitmap file formats. The standard, uncompressed bitmap structure can also be referred to as "BMP" format and/or device separate bitmap (DIB) structure. It provides a header, which describes the dimensions of the image as well as the number of colors the picture may include, and a listing of pixels with regards to matching colors. This simple, universal image format is acknowledged on nearly all platforms, it is not to efficient, particularly for big pictures. Various other bitmap image formats, such as for example JPEG, GIF, and PNG, include compression formulas to lessen quality. Each structure makes use of an alternate sort of compression, but they all represent a picture as a grid of pixels. Compressed bitmaps are dramatically smaller compared to uncompressed BMP files and may be downloaded more quickly. Consequently, many images you see on the web are squeezed bitmaps. If you zoom into a bitmap image, regardless of the extendable, it'll look blocky because each dot will take up one or more pixel. Therefore, bitmap images will appear blurry if they are increased. Vector layouts, conversely, are comprised of routes rather than dots, and that can be scaled without decreasing the quality of the picture. File extensions: .BMP, .DIB