Generalized biased centroid edge locator

Details Generalized biased centroid edge locator Generalized biased centroid edge locator

1996-05-22

1999-02-16

Chang, Jon

Image analysis

Applications

Target tracking or detecting

382199, 382288, 348171, G06T 760

Patent

active

058728570

ABSTRACT:
An edge locator processor having memory and which employs a generalized biased centroid edge locator process to determining the leading edge of an object in a scene moving in a generally horizontal direction across a video screen. The generalized biased centroid edge locator process includes defining a gate and determining the centroid position for that portion of the object within the gate. This occurs for a succession of gates, until predetermined conditions are met. By constructing this series of successively expanding gates, a left gate edge position and centroid position may be determined for each gate to define a series of left edge and centroid positions. These values may be linearly correlated to provide a slope and an intercept, from which the edge may be determined.

REFERENCES:
patent: 3950611 (1976-04-01), Callis et al.
patent: 4133004 (1979-01-01), Fitts
patent: 4189747 (1980-02-01), Funari
patent: 4539590 (1985-09-01), Gage
patent: 4549211 (1985-10-01), Assael et al.
patent: 4849906 (1989-07-01), Chodos et al.

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