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Multi-level laser-point cloud building boundary regularization method

A laser point cloud and building technology, applied in image analysis, image enhancement, instruments, etc., to achieve the effect of solving regularization problems and overcoming influence

Active Publication Date: 2017-03-29
WUHAN UNIV
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Problems solved by technology

[0004] On the basis of the above research, the present invention proposes a hierarchical regularization method from points to lines to polygons, using line features as regularization primitives, to solve the regularization problems of various types of boundaries, and to overcome the Effect of Noise on Regularization

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  • Multi-level laser-point cloud building boundary regularization method
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[0021] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0022] This method filters the original airborne point cloud, extracts the building point cloud, and uses the alpha-shape algorithm to extract the ordered boundary points of the building. Then, line segment extraction, curve reconstruction and global optimization are performed on the boundary point cloud.

[0023] please see figure 1 , a kind of multi-level laser point cloud building boundary regularization method provided by the present invention comprises the following steps:

[0024] Step 1: segment segmentation;

[0025] Extract the line segment set {E...

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Abstract

The invention discloses a multi-level laser-point cloud building boundary regularization method, which is characterized in that filtering is performed on original airborne point cloud, building point cloud is extracted, and orderly boundary points of a building are extracted by adopting an alpha-shape algorithm; and then line segment segmentation and extraction, curve reconstruction and global optimization processing are performed on the boundary point cloud. The method disclosed by the invention solves a problem of regularization for various types of boundaries, and well overcomes influences imposed on regularization by noises.

Description

technical field [0001] The invention belongs to the technical field of computer graphics and laser point cloud automatic processing, and relates to a method for regularizing building boundary points in an airborne laser scanning point cloud. Background technique [0002] With the process of urbanization, buildings are constantly being updated. How to quickly build a 3D model of a building to effectively serve urban planning and management, disaster emergency response and assessment, environmental protection, vehicle navigation and other fields plays an important role. In recent years, airborne laser 3D scanning technology (Airborne LiDAR) has been widely used in 3D reconstruction of buildings, in which the outline of buildings is the key information for automatic modeling. After the building point cloud is extracted, there are many methods to extract the building outline, but it is generally irregular and noisy, which is difficult to be directly applied to 3D modeling. Ther...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/12G06T7/13G06T7/136G06T7/181G06T5/00
CPCG06T5/70
Inventor 杨必胜李健平黄荣刚邹响红
Owner WUHAN UNIV
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