A pixel (from the English "picture element") can be defined as the smallest square of an image, sometimes also as a so-called light-sensitive cell. Pixels form the surface area of a sensing sensor and can be thought of as potential wells that capture and, thanks to a network of electrodes covering the sensor, hold charge in the form of electrons - each potential well representing one image point. The number of pixels in the horizontal and vertical directions and the size of the pixels are the basic characteristics of each sensor.Pixels exposed to more light accumulate more electrons and vice versa.
