1. An image sensor for scanning an image when the image sensor has a lower resolution than the image, the image sensor comprising: at least one full frame charge coupled device with a photosensitive layer, said photosensitive comprising a plurality of discrete pixels; and a mask covering said photosensitive layer, said mask has a plurality of apertures arranged such that there is one of said apertures that corresponds to one of said discrete pixels, each of said plurality of apertures in said mask being of a size that is less than the size of its corresponding to said one discrete pixel of the image sensor; said exposed portions of said photosensitive layer forming charge packets proportional to the intensity of light exposed to said exposed portions of said photosensitive layer and storing the charge packets in said full frame charge coupled device; first means for exposing only a portion of each of said discrete pixels, said portion being proportional to said aperture size, and second means for changing relative position of said apertures and their corresponding said discrete pixels to illuminate a different portion of each of said discrete pixels.