Method and system for interpolator direction selection...

Details Method and system for interpolator direction selection... Method and system for interpolator direction selection...

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

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