1. A method for constructing a motion-compensated composite image of a scene, the method comprising: (i) acquiring a plurality of images of a scene over time, the plurality of images including an earlier image of the scene and a later image of the scene; (ii) estimating relative motion between the earlier and later images; (iii) computing an exposure parameter value based upon the relative motion estimated between the earlier and later images; (iv) acquiring a number of new images of the scene, wherein the number is determined based on the computed exposure parameter value; and (v) compositing the earlier, later and new images of the scene to produce a motion-compensated composite image of the scene.