Object contour line extraction method and system

Abstract

The invention discloses an object contour line extraction method. The method comprises the steps of obtaining a surface model of an object; acquiring feature points on the surface model; selecting at least one feature point from the feature points as a growing point; selecting the feature points not including the growing points in the first preset range of the growing points as to-be-selected points; selecting new growing points from the to-be-selected points according to the growing directions of the growing points; taking the new growing point as a growing point to select a new growing point for the next time; and generating an object contour line according to all the growing points. The invention also discloses an object contour line extraction system. According to the invention, the object contour line can be generated after data processing is carried out on the assigned feature points, and compared with the prior art, due to the fact that the growth direction of the feature points has basic reference, the subsequent operation process is greatly simplified, and the detail precision of the contour line is greatly improved.

Description

technical field [0001] The invention relates to contour line extraction technology, in particular to a method and system for object contour line extraction. Background technique [0002] The contour line extraction technology based on 3D model has been widely used in many fields such as geometry processing, reverse engineering, aerial photography route planning and computer visualization. [0003] In the existing technology, the extraction of contour lines is generally based on the geometric relationship between feature points, such as projection, curvature, PCA, viewing angle extraction, etc., which generally have defects such as high time cost, complicated parameter setting, and weak feature extraction ability. Contents of the invention [0004] The technical problem to be solved by the embodiments of the present invention is that there are many defects in the existing contour line extraction technology, and the purpose is to provide a method and system for object contou...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the extraction of contour lines is generally based on the geometric relationship between feature points, such as projection, curvature, PCA, viewing angle extraction, etc., which generally have defects such as high time cost, complicated parameter setting, and weak feature extraction ability.

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