Non-photorealistic rendering method for three-dimensional network model with stylized typical lines

Abstract

The invention relates to a non-photorealistic rendering method for a three-dimensional network model with stylized typical lines, which comprises the following main steps: 1) calculating the principal direction and the principal curvature of each vertex in a three-dimensional network model; 2) solving the radial curvature of each vertex in the three-dimensional network model under the current viewpoint position, and normalizing all the radial curvatures; 3) carrying out cartoon rendering on the three-dimensional network model by using two-dimensional cartoon textures based on the normalized radial curvatures; 4) extracting typical lines of the three-dimensional network model, and expanding the typical lines along the normal directions of the vertices of the three-dimensional network modelto form a quadrangle; and 5) carrying out texture mapping on the typical lines of the three-dimensional network model by using two-dimensional stylized textures to generate the stylized rendering effect of the typical lines. Based on the above steps, the invention realizes the non-photorealistic rendering of the three-dimensional network model with stylized typical lines.

Description

technical field [0001] The invention belongs to the technical field of computer graphics, and relates to a method for cartoon rendering and feature line stylization of a three-dimensional mesh model. Background technique [0002] With the rapid development of graphics hardware, non-photorealistic rendering of 3D mesh models has become a trend. Non-photorealistic rendering (Non-Photorealistic Rendering) generally refers to all graphics and image rendering technologies with various hand-painted styles, the purpose of which is to use computers to automatically realize the creation of painting art. In people's production and life, non-photorealistic rendering is widely used in cartoons, animations, and video games, and the most common one is cartoon rendering. Using non-photorealistic rendering technology, you can use multiple styles to draw the same scene, such as pencil drawing, oil painting, watercolor and sketch effects, and you can quickly simulate a certain writer's paint...

AI Technical Summary

Problems solved by technology

[0013] Aiming at the disadvantages of the prior art, such as the limited cartoon rendering effect of the 3D grid model, the inability to display the internal features of the model, and the large amount of calculation of the stylized contour line, the purpose of the present invention is to propose a method with strong expressive force, less calculation amount, and Non-photorealistic rendering method of 3D mesh model with feature line stylization

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