An analog, single integrated circuit for providing centered video images. A light
detector array which can be, e.g., a CCD or an array of phototransistors or silicon
retinas, is scanned out to provide a video signal. Current summing lines along
each row and column of the array are used as inputs to x and y position sensitive
(computation) circuitry located on the edge of the pixel array. When the array
utilizes silicon retinas, an absolute value circuit is added to restore low frequency
information removed by the retinas to the current summing output. An on-chip sequencer
uses the x and y position outputs to scan out the video image centered to the nearest pixel.