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Parametric surface reconstruction method based on manifold

A surface reconstruction and manifold technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problems of low reconstruction efficiency and low reconstruction accuracy, achieve high efficiency and accuracy, reduce the number, and avoid stitching effect of operation

Inactive Publication Date: 2016-08-10
ZHONGBEI UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of low reconstruction efficiency and low reconstruction precision in existing surface reconstruction methods, and propose a manifold-based parametric surface reconstruction method

Method used

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  • Parametric surface reconstruction method based on manifold
  • Parametric surface reconstruction method based on manifold

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Embodiment 1

[0030] A manifold-based parametric surface reconstruction method in this embodiment includes the following steps:

[0031] 1) Point cloud collection: paste the position of the mark point on the Hand model. The mark point cannot be pasted on the feature of the model or the position where the curvature changes greatly. Paste fewer markers, and more markers at features or areas with large curvature changes. Connect the hand-held laser scanner to the computer, start the VXelements software and make it in the state of receiving data, press the trigger of the hand-held laser scanner, scan the marked points on the Hand model, and the Hand model will be displayed in the VXelements software as an intuitive point Cloud data is represented in the form of (see figure 1 );

[0032] 2) Point cloud simplification: use the octree method to establish the topological relationship of the collected Hand model point cloud data, so as to calculate the Hausdorff distance of the main curvature of ...

Embodiment 2

[0047] A manifold-based parametric surface reconstruction method in this embodiment includes the following steps:

[0048] 1) Point cloud acquisition: paste the position of the marked point on the 3D object, connect the handheld laser scanner to the computer, start the VXelements software and make it in the state of receiving data, press the trigger of the handheld laser scanner, and scan the 3D object mark point, then the three-dimensional object model is shown in the form of intuitive point cloud data in the VXelements software; the Dragon model point cloud data of the present embodiment comes from Stanford University website (see Figure 5 ).

[0049] 2) Point cloud simplification: use the octree method to establish the topological relationship of the Dragon model point cloud data, thereby calculating the Hausdorff distance of the principal curvature of each point, and the Hausdorff distance value and the threshold ξ=10 -3 For comparison, when the Hausdorff distance value ...

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Abstract

The present invention belongs to the field of the surface reconstruction method technology in a reverse engineering, and especially relates to a parametric surface reconstruction method. The objective of the invention is to mainly solve technical problems that a traditional method for allowing manifold to be used for surface reconstruction is many in the number of the coordinate charts and complex in the splicing operation in the later period. The parametric surface reconstruction method based on the manifold comprises: a three-dimensional laser scanner is employed to obtain cloud points of a three-dimensional object and is configured to perform simplification of the cloud points of the three-dimensional object; the simplified cloud points are taken as vertexes of a control grid, and the cycle neighbourhood of the control vertexes is parameterized to obtain the coordinate charts to obviously reduce the number of the coordinate charts; construction transfer function is bonded through the coordinate charts to obtain the domain of definition of the parametric surface; and a base function is constructed on the domain of definition, and the base function is normalized to obtain the unit resolution on the differential manifold. The unit resolution on the manifold and the control vertexes are composited to realize surface reconstruction, so that the splicing operation of complex curved surface pieces, and the parametric surface reconstruction method based on the manifold is suitable for the curved surface reconstruction of any complex topology and has higher efficiency and precision.

Description

technical field [0001] The invention belongs to the technical field of surface reconstruction methods in reverse engineering, and in particular relates to a parametric surface reconstruction method. Background technique [0002] Influenced by military, medical, industrial and other industries, how to achieve high-precision and high-efficiency reconstruction of large-scale point cloud data has become a research hotspot in the field of computer vision. Smooth surface reconstruction with complex topological structure is a difficult point in the field of computer-aided design. It is difficult to realize with only one parametric surface. Usually, the entire surface is divided, constructed in pieces, and then spliced ​​together. In recent years, non-uniform rational B-spline (NURBS) parametric surface modeling technology has become a research hotspot in the field of 3D modeling. NURBS surface fitting has the characteristics of spatial geometry invariance, local support, and smoot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30
CPCG06T17/30G06T2215/06
Inventor 韩慧妍张丹丹韩燮况立群杨晓文
Owner ZHONGBEI UNIV
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