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Method of extracting building contour line from Lidar point cloud data based on curvature

A point cloud data and contour line technology, applied in image data processing, 3D modeling, instruments, etc., to improve efficiency and improve working methods

Inactive Publication Date: 2017-04-26
MAPUNI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The object of the present invention is to provide a kind of method that extracts building outline from Lidar point cloud data based on curvature, thereby solves the aforementioned problem existing in the prior art

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  • Method of extracting building contour line from Lidar point cloud data based on curvature
  • Method of extracting building contour line from Lidar point cloud data based on curvature
  • Method of extracting building contour line from Lidar point cloud data based on curvature

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specific Embodiment

[0102] Embodiments of the present invention provide a method for extracting building contours from Lidar point cloud data based on curvature, which can be implemented in the following steps:

[0103] S1, point cloud data denoising processing;

[0104] Scattered point clouds have no obvious geometric distribution characteristics, are scattered and disordered, and have no regularity. Therefore, in order to process them faster and better, the point cloud data should be denoised first.

[0105] S2, dynamic grid division of point cloud data;

[0106] The present invention aims at the irregularity of the distribution of scattered point clouds, and the differential characteristics of only points cannot represent the differential characteristics of all points during direct grid division. Topological relationships between point clouds.

[0107] Set the maximum and minimum x, y, and z coordinate values ​​in the point cloud data to be {Xmax, Ymax, Zmax, Xmin, Ymin, Zmin} respectively, ...

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Abstract

The invention, which relates to the technical field of the Lidar data processing, discloses a method of extracting a building contour line from Lidar point cloud data based on a curvature, wherein the method is applied to contour extraction during a digital city construction process and a production process of three-dimensional model establishment. The method comprises steps of denoising processing of point cloud data, dynamic mesh division of point cloud data, solution of point cloud normal vector and curvature, regional segmentation of point cloud data, and contour line extraction of point cloud data. According to the method disclosed by the invention, a reliable solution is provided for automatic calculation and extraction of a regular building contour line structure during the digital city contour line extraction and three-dimensional modeling process of the geographic information industry, so that a working way of purely manual building contour line extraction at this stage can be improved and the efficiency of the three-dimensional data production of the digital city can be enhanced.

Description

technical field [0001] The invention relates to the technical field of Lidar data processing, in particular to a method for extracting building contour lines from Lidar point cloud data based on curvature, which is applied in the production process of contour line extraction and three-dimensional model establishment in the digital city construction process. Background technique [0002] As one of the important surface features of urban areas, buildings have important applications in many fields such as modern urban planning and construction, disaster prevention, natural resource exploration and utilization, and digital city construction. [0003] In recent years, with the acceleration of urban digitalization, the research on urban buildings based on fast and accurate data sources has gradually become a new development trend. [0004] In the field of surveying and mapping, such as reconstruction of digital city 3D model and quality monitoring in large-scale engineering constr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/13G06T17/30
CPCG06T17/30G06T2207/30184
Inventor 田庆丁翔胡磊姚勇李月华
Owner MAPUNI TECH CO LTD
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