1. An apparatus, comprising: a strip buffer to temporarily store an image data stream associated with a new version of an image as the image data stream is received from an image sensor array (ISA); an image comparator to compare a selected set of low-frequency coefficients of a new frequency domain (FD) image block associated with the new version of the image to a corresponding set of low-frequency coefficients of an earlier-stored composite FD image block associated with at least one previously received version of the image; and combinational logic to combine the new FD image block with the earlier-stored composite FD image block to yield a new composite FD image block if the selected set of low-frequency coefficients of the new FD image block match the corresponding set of low-frequency coefficients of the earlier-stored composite FD image block within a match threshold.