In digital imaging, a pixel (abbreviated px ), pel , or picture
element is the smallest addressable element in a raster image, or the
smallest point in an all points addressable display device. In most digital
display devices, pixels are the smallest element that can be manipulated
through software.
Each pixel is a sample of an original image; more samples typically provide
more accurate representations of the original. The intensity of each pixel is
variable. In color imaging systems, a color is typically represented by three
or four component intensities such as red, green, and blue, or cyan, magenta,
yellow, and black.