Image analysis – Pattern recognition – Feature extraction
Patent
1997-01-15
1998-11-03
Boudreau, Leo H.
Image analysis
Pattern recognition
Feature extraction
382104, 382128, 382266, G06K 948, G06K 900, G06K 940
Patent
active
058321160
ABSTRACT:
A method of extracting the contour of an object having two lateral edges, for example a road, from a digitized photographic image using an automatic active contour propagation process, comprises the steps of entering first and second initial contours near respective lateral edges of the object in the image. The first initial contour is propagated by means of a first automatic active contour propagation process and the second initial contour is propagated by means of a second active contour propagation process. Each propagation process uses, firstly, an energy model including a term relating to elastic coupling forces between paired points of the first and the second initial contours and, secondly, a direction of prolongation of the active contour defined as an average of two prolongation directions determined for the first and the second active contours, respectively.
REFERENCES:
patent: 4906940 (1990-03-01), Greene et al.
P. Fua et al, "Model driven edge detection", Machine Vision and Applications, Winter 1990, USA, vol. 3, No. 1, ISSN 0932-8092, pp. 45-56.
Alcatel Alsthom Compagnie Generale d'Electricite
Boudreau Leo H.
Novik Dmitry A.
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