Three-dimensional model simplifying method based on visual feature measurement

A technology of visual features and 3D models, applied in the field of 3D model simplification, can solve problems such as large visual error between the simplified model and the original model, visual degradation, and failure to preserve the grid first

Inactive Publication Date: 2009-09-30
BEIHANG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] But from the current point of view, one disadvantage of this type of method is to make the simplification of each part of the model tend to be even
This makes the boundaries, contours, and sharp areas with large curvatures that are more sensitive to the human visual system unable to be preferentially preserved, resulting in visual degradation
Especially in the case of low resolution, the loss of some important visual features of the model will be more serious, making the visual error between the simplified model and the original model too large, which cannot meet the needs of wider applications

Method used

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  • Three-dimensional model simplifying method based on visual feature measurement
  • Three-dimensional model simplifying method based on visual feature measurement
  • Three-dimensional model simplifying method based on visual feature measurement

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Embodiment Construction

[0053] Below in conjunction with embodiment the present invention is described in further detail

[0054] The three-dimensional model original data of the present invention adopts the three-dimensional model Happy Buddha of the PLY form of Stanford University, and original model contains 108,770 triangular faces, and the step of its simplified model is as follows:

[0055] 1. Vertex type analysis, first load the 3D model of Happy Buddha, and then perform connectivity analysis on the vertices of the model, and divide the vertices into four types: common vertices, boundary vertices, special vertices and isolated vertices. The data structure implemented by the vertex class is shown in Table 1.

[0056] Table 1 Key data of vertex class

[0057] enum

VertexType

{

VT_NORMAL;

VT_BORDER;

VT_SPECIAL;

VT_SINGLE;

};

class CVertex

{

VertexType m_eType;

float m_fError;

Vectorm_vecNeiVert;

Vectorm_vecNeiFace; ...

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Abstract

The 3D model simplification method based on visual characteristic metric comprises: (1) analyzing vertex connection for loaded model to divide into common vertex, boundary vertex, special vertex, and isolated one; (2) calculating vertex error to store into opposite vertex; (3) creating the minimal stack; (4) selecting the edge with minimal error for folding, calculating the error of near vertexes with changed connection; (5) updating the stack; (6) repeating (4) till simplification request. This invention reduces visual error.

Description

technical field [0001] The invention relates to a three-dimensional model simplification method, in particular to a three-dimensional model simplification method based on visual feature measurement. Background technique [0002] 3D model simplification is a technology that accompanies the development of modeling technology. Modeling technology mainly studies how to represent a three-dimensional geometric model. In recent years, on the one hand, with the emergence of 3D scanners and other equipment, the acquisition of 3D mesh models has become more and more simple, making the models more and more complex, and its scale has exceeded the processing capacity of computers; Development has made the network transmission of 3D models an inevitable trend. Therefore, in order to speed up the drawing of the virtual scene and transmit the model to the user through the network with a faster response time, the model simplification technology has gradually developed into an independent t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00G06T15/10G06T15/00
Inventor 赵沁平李帅
Owner BEIHANG UNIV
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