Synergistic tracker

Details Synergistic tracker Synergistic tracker

G - Physics

01

S

343/70

G01S 13/72 (2006.01) G01S 3/786 (2006.01)

Patent

CA 2026909

SYNERGISTIC TRACKER ABSTRACT OF THE INVENTION Target tracking capability is provided by a synergistic tracker system (5) which includes both a correlation tracker (30) and an object tracker (40) for processing sensor data input (10) and for generating tracking error signals (80). The operation of the synergistic tracker system is controlled by central processing unit (70). The system operates by first correlating a reference region image with a portion of a current digitized image provided by analog to digital converter (20). Secondly, the object tracker provides a precisely defined trackpoint for an object within the current image. The correlation tracker stabilizes and limits the portion of the digitized image that the object tracker must operate upon. Stabilizing and limiting this portion of the digitized image reduces the object tracker's sensitivity to background clutter and sensitivity to a loss of lock induced by sensor motion. The object tracker provides a non-recursive update for the correlation's reference region image. The correlation tracker and the object tracker are used simultaneously and cooperatively so that the strengths of a one tracker are used to overcome the weaknesses of the other. The invention achieves a greater tracking tenacity, a reduction in tracker angle noise, and a reduction in hardware complexity.

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