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

A 3D grid, non-realistic technology, applied in 3D image processing, image data processing, instruments, etc., can solve the problems of limited cartoon rendering effect of 3D grid model, inability to display the internal features of the model, and less calculation. Achieve a good drawing effect and enrich the details of internal features

Inactive Publication Date: 2011-03-09
INST OF AUTOMATION CHINESE ACAD OF SCI
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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

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

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[0039] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0040] 1. Overview of the method

[0041] like figure 1 The flow of the whole method of the present invention is shown. The core of the method is to perform non-photorealistic rendering of 3D models based on 2D textures, including two processes of cartoon rendering with cartoon textures and stylization with feature lines of stylized textures. The specific method includes 6 steps:

[0042] Step 1: Read the 3D mesh model data;

[0043] Step 2: Calculate the principal curvature and principal direction of each vertex in the 3D mesh model;

[0044] Step 3: Under the current viewpoint, calculate the radial curvature value of each vertex of the 3D mesh model according to the main curvature and main direction;

[0045] Step 4: Normalize the rad...

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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 model to 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 grid 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...

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Application Information

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IPC IPC(8): G06T15/00G06T15/70
Inventor 郝雯车武军张晓鹏王映辉
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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