Abstract: A digital video correlator wherein a reference image and a live image are digitized and compared against each other in a shifting network to determine the correlation or degrees thereof existing between the two images. Fundamentally, the invention includes a video digitizer which divides live and real images from various sources into picture elements and digitizes those elements to fixed voltage levels. The digitized live image is passed to a dynamic memory consisting of a plurality of interconnected shift registers while the digitized reference image is maintained within a first set of shift registers comprising a portion of a processor. A second set of shift registers within the processor maintain therein a mask function. Yet a third set of shift registers within the processor are interconnected in parallel to the dynamic memory to receive, under control of a clock, the digitized data of the live image.