1. A method for image data fusion, comprising: providing a first set of image data corresponding to an imaged first scene; providing a second set of image data corresponding to an imaged second scene that at least partially overlaps said first scene in an overlap region, the overlap region defining a first collection of overlap image data as part of the first set of image data and a second collection of overlap image data as part of the second set of image data; representing said second collection of overlap image data as a plurality of image data subsets such that each of the subsets is based on at least one characteristic of the second collection of overlap image data, and each subset spans the overlap region; and producing a fused set of image data by modifying the first collection of overlap image data based on at least a selected one of, but less than all of, said image data subsets, wherein the representing and producing steps are performed by an image processor.