US Patent 7804519 Method of refining a plurality of tracks

One embodiment of a method of refining a plurality of primary tracks of a plurality of targets can be broadly summarized by the following steps: receiving a plurality of primary tracks, wherein each primary track includes ordered sequences of observation events having similarities in their visual signatures; dividing the primary tracks into separate refinement packages; allocating the refinement packages to different ones of a plurality of processors; and receiving one or more refined tracks from the plurality of processors. Other methods and systems are also provided.