1 ) A method of enhancing an image comprising the steps of: a) providing a series of image frames including at least a reference image frame and a subsequent image frame, each of the image frames including a region having a known feature; b) providing for the region of at least each of the reference image frame and the subsequent image frame a mask that defines at least in part its related region, the mask of the subsequent image frame being displaced from its known feature in a manner differing from the displacement of the mask of the reference image frame from its related region, each of the masks comprising a plurality of pixels; c) measuring the luminance value of selected pixels of each the reference image frame and the subsequent image frame; and d) adjusting the displacement of the subsequent frame with respect to its feature and determining the difference between the luminance values of the pixels of the reference image frame with the luminance values of the corresponding pixels of the subsequent image frame to determine the displacement between the subsequent frame and its feature when the difference has been minimized.