PIXEL
Pixel, short for picture element, is the smallest addressable element in a digital image or display. In a raster image, the image is organized as a two-dimensional grid of pixels; each pixel encodes color and brightness information for a small portion of the picture. Typically, color pixels store data in one or more color channels—most commonly red, green, and blue (RGB). A pixel’s color is determined by the combination of its channel values; the overall image quality can be described by the color depth per channel (for example, 8 bits per channel, yielding 24-bit color) and by the total pixel count.
The term pixel is a portmanteau of picture element and was popularized in the 1960s–1970s in computer
On displays, pixels are laid out in a regular grid; each pixel is typically made from subpixels
In digital cameras and scanners, the sensor provides a grid of photosites that, after processing (and sometimes