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Simplification method of three-dimensional grid model based on triangle folding

A technology of triangular meshes and three-dimensional meshes, applied in the field of image processing, can solve the problem of difficult trade-off between computational complexity and model feature retention, and achieve the effect of simplifying the end of the operation.

Active Publication Date: 2013-01-16
CHONGQING UNIV
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Problems solved by technology

Among the above three simplification algorithms, triangle folding is the fastest algorithm among geometric element deletion algorithms, but it is difficult to get a balance between computational complexity and model feature preservation.

Method used

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  • Simplification method of three-dimensional grid model based on triangle folding
  • Simplification method of three-dimensional grid model based on triangle folding
  • Simplification method of three-dimensional grid model based on triangle folding

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the scope of the present invention.

[0033] A method for simplifying a three-dimensional mesh model based on triangular folding, comprising the following steps:

[0034] 1) Obtain the triangular mesh model of the measured object;

[0035]In the embodiment, the formed triangular mesh model is obtained by reconstructing industrial CT tomographic images using the MC (Marching Cubes) algorithm. The present invention is not limited to the triangular mesh model obtained by the above method, and it is suitable ...

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Abstract

The invention provides a simplification method of a three-dimensional grid model based on triangle folding. According to the simplification method, folding points of each triangle in the model are calculated by vertex projection, geometrical elements in grid patterns are folded to achieve the aim of simplification, and error control is performed on simplification by combination with volume errors caused in simplification, the maximum area value and normal vector errors. The simplification method solves the problems that the data transmission quantity and the storage quantity of three-dimensional images are over large, geometrical characteristics of an original model are effectively maintained while errors of a simplified model are reduced, and the simplification method has important application values in the fields of computer aided design and medical image systems and the like.

Description

technical field [0001] The invention belongs to the field of image processing and relates to a method for simplifying a three-dimensional mesh model based on triangle folding. Background technique [0002] With the continuous improvement of 3D data acquisition technology, people can get more and more sophisticated 3D models. In computer graphics, since the triangle is the basic display unit directly supported by many graphics hardware, the triangular mesh model is still the main representation of 3D models at present. Complex models put forward high requirements on computer storage capacity, processing speed, rendering speed, transmission efficiency, etc. However, in many cases, high-resolution models are not always necessary, and we can use relatively simple model to replace the original model, which requires simplification of the 3D mesh model. The 3D mesh model simplification refers to constructing an approximation model of the original model with as few triangles, edge...

Claims

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Application Information

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IPC IPC(8): G06T17/00
Inventor 段黎明张霞
Owner CHONGQING UNIV
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