1. A method, comprising the steps of: for a set of frames that define a temporal window over a moving image sequence, accessing a motion estimate that describes a change to a region of a reference frame with respect to at least one frame, which is displaced within the set of frames from the reference frame over the temporal window; wherein the regions of the reference frame and the at least one frame contain at least a portion of an image feature; and smoothing the motion estimate over the temporal window.