Feature enhancement line drawing method for three-dimensional model

Abstract

The invention discloses a feature enhancement line drawing method for a three-dimensional model. By the feature enhancement line drawing method, linear framework information which represents the overall feature of the three-dimensional model is introduced into line drawing. The feature enhancement line drawing method includes steps of (1), extracting contour lines of the model by a contour line extracting algorithm on the basis of point traversing; (2), drawing geometric feature lines of the three-dimensional model; and (3), extracting feature lines of a framework of the model by a framework extracting algorithm on the basis of a convex hull and an OBB (oriented bounding box), specifically, extracting features of the framework, and performing line drawing on the basis of the framework. The feature enhancement line drawing method for the three-dimensional model has the advantages that the linear framework is extracted by a process for enabling the convex hull to interact with the oriented bounding box, and line drawing is carried out on the basis of the framework, so that the linear framework information which represents the overall feature of the three-dimensional model is introduced into line drawing, a model line drawing effect can be greatly improved, abundant sensing information is added on the basis of the model line drawing effect, and a great artistic effect is realized.

Description

technical field [0001] The invention relates to the fields of three-dimensional model line drawing, non-realistic drawing, computer art, cartoon animation, medical data visualization, object recognition and matching, virtual navigation, etc., more specifically, a method used in art display, engineering drawing, and data illustration A feature-enhanced 3D model line rendering method. Background technique [0002] The existing 3D line drawing methods mainly focus on how to obtain the characteristic lines of the model, and how to control the change of the characteristic line width according to other information to produce artistic effects. The recent line drawing algorithm draws richer characteristic lines For the purpose, according to the geometric differential information, the characteristic line is given a clear mathematical definition, and it is judged whether each point on the model is on the characteristic line. The current commonly used methods are as follows: [0003]...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the defects that the existing line drawing method cannot effectively preserve the overall shape information of the model, the details of the surface of the object are not rich enough, and the artistic effect of visual perception is not strong, etc., the present invention provides a feature-enhanced 3D model line drawing method, which will characterize the 3D model The linear skeleton information of the overall feature is introduced into the line drawing, including the following steps:

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