Line vectorize algorithm based on trend preferential tracking direction
Gao You-xing · 2006
Straight-line segments are the most frequently used constituent in most engineering drawings.Many other constituent,such as circles,arcs,and curves is generated through straight line segments approximation,so the vectorization of straight lines is one of the most important research directions in the field of recognition of engineering drawings.Considering the characteristics of engineering drawings,a trend preferential tracking direction based on line vectorize algorithm is proposed.In the thinned drawings,the preferential tracking direction is determined by the slope of line,which solved the problem of long-line's disconnection at intersections.Combined with the method of correcting while tracking in tracking process,the overabundance of short-line segments is avoided and the small-slope-line and big-slope-line are also well recognized.