Abstract: Light quantization of elemental areas of pictorial information by a plurality of contiguous light integrating tunnels, either with or without one of a group of different sampling-function array masks and/or printing-function array masks, is used to modify the original picture information for such purposes as subjectively providing a (1) more pleasing picture, (2) striking special display effects and (3) studying visual perception by the human visual system. Analog processor replaces expensive computer equipment which also required tedious programming, formerly required for producing similar modification of picture information.