Television – Object tracking
Patent
1997-11-14
1999-12-21
Chin, Tommy P.
Television
Object tracking
348214, 382103, H40N 718
Patent
active
060056096
ABSTRACT:
A method and an apparatus for tracking a target wherein a shape of a target is extracted from a former image which includes an initial image of the target for tracking, and then an area including the shape of the target is extracted as a correlation area. Based on the correlation area, a checking area is extracted from a current image to check for a correlation. By utilizing a correlation function, the correlation between the former image and the current image is calculated. A location change of the target is calculated to estimate a movement of the target, on the basis of the calculated correlation. Compensating the estimated movement during operation of a camera, the camera is controlled so that a gazing point of the camera can track the target. The correlation area can be acquired either by extracting a boundary pixel of the target and scanning to extract a shape of the target which serves as the correlation area, or by quad-tree dividing and merging a window including the target on the basis of a luminosity of each pixel.
REFERENCES:
patent: 4133004 (1979-01-01), Fitts
patent: 4227212 (1980-10-01), Woolfson et al.
patent: 5031049 (1991-07-01), Toyama et al.
patent: 5034986 (1991-07-01), Karmann et al.
patent: 5285273 (1994-02-01), James et al.
Chin Tommy P.
Daewoo Electronics Co. Ltd.
Voisinet John A.
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