Geek-of-All

Pixels are dots used to display an image on a screen or printed matter. The word is a blend of the words pic ture and el ement. Usually, the term refers to pixels in a digital context, but it is can be more generalized to refer to any smallest unit of an image. It is important to recognize that pixels are not a measure of size, though often the term is used as though they are.Think of it as a logical - rather than a physical - unit. The physical size of a pixel depends on how you've set the resolution for the display screen. If you've set the display to its maximum resolution, the physical size of a pixel will equal the physical size of the dot pitch (let's just call it the dot size) of the display. If, however, you've set the resolution to something less than the maximum resolution, a pixel will be larger than the physical size of the screen's dot (that is, a pixel will use more than one dot). A video monitor is made up of many millions of...

A bitmap is one of many types of file formats for images stored in a computerized form. It carries the extension .BMP . Computers use bits of 1 and 0 to store data. A bitmap is literally a map of bits that form a particular picture when rendered to a display like a computer monitor . To understand how a bitmap image displays, it’s important to understand the computer display screen. The display is made up of rows and columns of tiny blocks, or pixels . In a bitmap image, each pixel is assigned at least one bit to indicate whether the pixel should reflect the background color, the foreground color, or some other color. In the case of a page of black and white text, let’s consider a single letter. The many pixels that make up that letter only require one bit of data each. Either the pixel will be black or white: 1 or 0. When a bitmap displays a colored image, such as a lake scene, there are several shades of gradation in colors and lighting. In this case, each pix...