Boots – shoes – and leggings
Patent
1987-08-24
1989-07-18
Lall, Parshotam S.
Boots, shoes, and leggings
364518, 358126, G01S 1300, G01S 1300
Patent
active
048499064
ABSTRACT:
Point and area target tracking are employed by a dual mode video tracker which includes both a correlation processor (30) and a centroid processor (32) for processing incoming video signals representing the target scene (20) and for generating tracking error signals over an entire video frame. A microcomputer (26) controls the operation of the correlation and centroid processors, as well as a preprocessor (28) which preconditions the incoming video signals. The tracker operates in any of several modes in which the correlation and centroid processors function either independently or cooperatively with each other. The correlation processor generates a reference map in pixel format which is used to produce azimuth and elevation optimal weighting values for each pixel in the field-of-view. The reference map is recursively updated. The track gate for the correlation processor is automatically sized using a gradient function derived from the optimal weighting values. The gradient function is also employed along with difference video to determine correlation tracking status. The correlation and centroid tracking errors may be combined to form a composite signal defining a true complementary function.
REFERENCES:
patent: 4133004 (1979-01-01), Fitts
patent: 4189747 (1980-02-01), Funari
patent: 4270143 (1981-05-01), Morris
patent: 4272783 (1981-06-01), Warnstam et al.
patent: 4409661 (1983-10-01), Romanski
patent: 4549211 (1985-10-01), Assael et al.
patent: 4719584 (1988-01-01), Rue et al.
Wolfe and Zissis, "The Infrared Handbook", 1978-1985, pp. 22-64-22-65.
Chodos Steven L.
Pope Gordon T.
Rue Arthur K.
Hughes Aircraft Company
Karambelas A. W.
Lall Parshotam S.
Mattson Brian M.
Streeter W. J.
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