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A method for removing geometric details of point cloud

A detailed feature and geometric technology, applied in the direction of image data processing, instruments, etc., can solve the problems of lack of connection between points, not easy, etc., and achieve the effect of maintaining no deformation, good robustness, and good operability

Active Publication Date: 2020-02-18
SOUTH CHINA UNIV OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

However, when this method is directly applied to the field of point cloud filtering, due to the lack of connection between points, there will be figure 1 The sharp edge in (g) distorts the situation, so it is not easy to apply the rolling filtering method to the field of point cloud processing

Method used

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  • A method for removing geometric details of point cloud
  • A method for removing geometric details of point cloud
  • A method for removing geometric details of point cloud

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with specific examples.

[0029] The point cloud geometric detail feature removal method provided in this embodiment is mainly based on rolling normal vector filtering and multi-normal technology, including the following steps:

[0030] 1) Use rolling filtering method to filter the normal vector field, the formula is as follows:

[0031]

[0032] In the formula, is the normalization factor, k is the number of iterations, is p i The normal vector after the k+1 iteration filtering of the point, n is the number of vertices of the point cloud, n j is p j the original normal vector of is the position difference weight, when p j point and p i The farther the Euclidean distance of the point, the smaller the weight; is the normal vector difference weight, when pj the point's normal vector with p i the point's normal vector The larger the normal vector difference, the smaller the weight. Th...

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Abstract

The invention discloses a geometric detail feature removal method for point clouds. The geometric detail feature removal method based on rolling-method vector filtering and multi-normal technology includes 1), filtering a point-cloud normal vector field according to a rolling filtering method; 2), updating a point position according to the filtered normal vector field to complete detail feature removal. The geometric detail feature removal method has the advantages that the normal vector field is filtered according to the rolling filtering method, so that large scale features of objects are not obscured during removal of the detail features; by a multi-normal method, sharp features of the objects are prevented from being distorted, and accordingly, the geometric features of the point cloudmodels are edited; the geometric detail feature removal method can be applied to noise data and has high robustness and good promotion prospect.

Description

technical field [0001] The invention relates to the fields of computer graphics and point cloud geometric detail feature filtering, in particular to a point cloud geometric detail feature removal method based on rolling normal vector filtering and multi-normal technology. Background technique [0002] In recent years, with the emergence of virtual reality and augmented reality technology and the increasing importance of shape analysis technology, point cloud processing technology has become the focus of attention in the field of geometry processing again. Moreover, with the development of 3D shooting equipment, the acquired 3D scenes become more and more complex and rich. However, overly complex point cloud geometric features are not conducive to reconstruction, shape analysis, and semantic segmentation in real-time processing. Therefore, as a preprocessing step, it becomes very meaningful to suppress the small-scale features in the model while keeping the large-scale struc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T19/20
CPCG06T19/20
Inventor 郑颖龙李桂清伍世浩徐雪妙聂勇伟
Owner SOUTH CHINA UNIV OF TECH
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