Method of extracting contours using a combined active contour an

Details Method of extracting contours using a combined active contour an Method of extracting contours using a combined active contour an

1996-06-14

1999-01-19

Shalwala, Bipin

Image analysis

Applications

Reading maps, graphs, drawings, or schematics

382174, 382199, 382203, 382266, G06K 900, G06K 934, G06K 948, G06K 946

Patent

active

058622454

ABSTRACT:
A semi-automatic method of extracting a contour in a digital image using a combined active contour and starter/guide approach is based on an iterative process of deforming an active contour to obtain a current trace and extending the current trace by a straight line segment. An initial contour is entered into the image to seed the iterative process. Local analysis of the digital image at a point of the initial contour determines a first reference datum. At each iteration this analysis is carried out locally at a plurality of points around the end point of the current trace to determine, by correlation with the first datum, the orientation of the straight line segment extending the current trace.

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