Flatbed scanner, X-ray. Scanners convert an image, for instance a photograph, into a digital file. This file can be viewed as the image on a computer screen, and the image can then be manipulated. The scanner's control buttons (bottom centre) and a printed circuit board (upper left) are seen. The light source that is shone onto the image, which moves from the front to the back of the scanner during the scanning process, is across lower centre. The tracks along which the light source moves (down centre) and the pulley that moves the light source (upper left) are also seen.