Image analysis – Pattern recognition – Feature extraction
Reexamination Certificate
2004-09-21
2008-08-12
Patel, Kanji (Department: 2624)
Image analysis
Pattern recognition
Feature extraction
C348S448000
Reexamination Certificate
active
07412096
ABSTRACT:
A system and method that determines the direction of an edge in a video image using a gradient of the edge in a first direction and a gradient of the edge in a second direction. The system uses the sign of the product of the gradient in the first direction and the gradient in the second direction along with a ratio of multiples of the two gradients to determine the direction of the edge. The direction may correspond to an angle range, where the ratio of the gradients corresponds to a trigonometric function of the angle of the edge.
REFERENCES:
patent: 4400719 (1983-08-01), Powers
patent: 6614474 (2003-09-01), Malkin et al.
patent: 6628330 (2003-09-01), Lin
patent: 6993190 (2006-01-01), Nguyen
patent: 7245326 (2007-07-01), Orlick
Law Patrick
Neuman Darren
Broadcom Corporation
McAndrews Held & Malloy Ltd.
Patel Kanji
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