include correction of laser printer dot spreading at the pixel level, processing to enhance the compression ratio, reproduction of halftone images with 64-gradation, two-dimensional MTF correction using moire suppression, and infinite shading for all pixels using a division technique. These combine to yield top image reproduction quality. Gain control: Analog control using an external operational amplifier and the built-in field effect transistor (FET) An external resistor determines the follow-.