What a person sees on a monitor or TV screen, in a newspaper or in a color photograph is a picture made up of millions of tiny dots of different colors. These are the pixels. The term is used throughout engineering, typography, and programming. Any photo saved on a computer or digital camera, and even every frame of a video, is made up of pixels.
Pixel (Pixel) - a concept that arose in the development of digital technology. It is an abbreviation of the two words picture and cell and defines the minimum element that makes up a bitmap. This concept is widely used in engineering and programming.
The image on the monitor and in the printed form is presented precisely in the form of separate dots - pixels. The size of a raster image is expressed in the number of pixels per height and width of the image, for example, 1680x1050, and is called the resolution.
Pixels on the monitor matrix
If you look closely at the monitor matrix, you can see small multi-colored dots. The image is formed from them. A separate pixel on the monitor is formed by a group of subpixels of three primary colors: red, green, blue. The hardware part of the monitor receives information from the PC about the pixel color, brightness and intensity, on the basis of which it determines what parameters the subpixels should have. After that, control signals are sent to the matrix, and at a certain point the desired color is already visible. The same goes for plasma TVs.
Older CRT monitors also create a picture by forming a pixel based on a group of subpixels of three primary colors. Only in this version, a pixel can contain not one, but many subpixels of red, green and blue colors.
The high quality of LCD monitors is determined by the fact that a separate pixel on the monitor matrix is allocated for each output pixel. This eliminates the unpleasant effect of moiré, the differences in the size of each pixel.
Pixels in digital photography
Any photograph saved digitally is a matrix of pixels and the values of color, saturation and brightness for each of them. If, when viewing a photo, try to enlarge it on the PC monitor as much as possible, you can see these pixels, which are squares with a certain color. There are no color transitions inside the square, and only when removing, when thousands of neighboring pixels with excellent shades appear in the field of view, the human eye sees color transitions and distinguishes objects that were photographed, not paying attention to each pixel separately.
The smaller the pixels are, the better the image built from them will appear to a person. The number of pixels per square inch is a characteristic of the quality of a photograph, a matrix of a monitor or a smartphone.
Bitmap processing involves working with individual pixels or groups of pixels. By changing their color and brightness, you can create a new picture or edit an existing one.
