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Processing method for three-dimensional model of external memory

A processing method and technology for 3D models, applied in image data processing, 3D modeling, instruments, etc., can solve the problems of inability to read content at one time, long operation time, etc., and achieve the effect of good spatial uniformity

Active Publication Date: 2013-02-13
INST OF AUTOMATION CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The invention provides a processing method for an externally stored three-dimensional model, which realizes gridding consistent with the topology of the original data on the basis of sampling point cloud data, and solves the problem of long operation time and inability to do it at one time in the prior art Read in the content for processing and other issues

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  • Processing method for three-dimensional model of external memory

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Embodiment Construction

[0049] 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 in conjunction with specific embodiments and with reference to the accompanying drawings.

[0050] figure 1 It is a flow chart of a method for processing an externally stored three-dimensional model provided by the present invention. Such as figure 1 As shown, the method includes the following steps:

[0051] Step 1: Obtain point cloud data;

[0052] Step 2: Calculate the cross arrangement value (Z value) of each point from the point cloud data;

[0053] Step 3: Sort the point cloud data according to the cross arrangement value of each point of the point cloud data;

[0054] Step 4: Re-sample the point cloud data according to the sorting of the point cloud data;

[0055] Step 5: According to the sampling result of the point cloud data, establish a triangular mesh with the same shape as the point cloud data, and the t...

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Abstract

The invention discloses a processing method for a three-dimensional model of an external memory. The method can be used for point resampling of the three-dimensional model of the external memory, the gridding reconstruction of point cloud of the external memory and compression of the three-dimensional model for model analysis on the external memory on the basis of space curve sequencing. According to the method, point cloud data can be sampled in a large scale, a sampling result has high spatial uniformity, the constraints of original data are also utilized during reconstruction, and a triangular manifold grid consistent with the topology structure of original point cloud data can be generated.

Description

Technical field [0001] The invention relates to the technical fields of computer graphics and computer vision, in particular to a processing method of an external storage three-dimensional model. Background technique [0002] Three-dimensional mesh models reconstructed from point clouds can be divided into two categories: methods based on implicit surfaces and methods based on computational geometry. The method based on computational geometry can ensure that the position information of the point in the initial point cloud is retained as the vertex of the mesh model in the reconstruction result. The basic idea of ​​this kind of method is to triangulate the initial point cloud or construct a Voronoi diagram (Voronoi Diagram), then delete and retain the triangles according to certain rules, and finally get the manifold mesh surface. Some scholars have proposed a reconstruction method called Power Crust. This method first establishes the Voronoi diagram of the point cloud data, and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
Inventor 张晓鹏李尔孟维亮
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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