Sorting method of vehicle-mounted laser scanning point cloud data of urban ground objects

A vehicle-mounted laser scanning and point cloud data technology, which is applied in the direction of electrical digital data processing, special data processing applications, electromagnetic wave re-radiation, etc., can solve the problems of low degree of self-adaptation and the inability to classify cloud data, and improve self-adaptation degree of effect

Inactive Publication Date: 2013-11-13
WUHAN UNIV
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Problems solved by technology

However, these methods are less self-adaptive and usually need to manually set more thresholds, and cannot achieve efficient and accurate classification for vehicle-mounted laser scanning point cloud data in complex urban environments.

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  • Sorting method of vehicle-mounted laser scanning point cloud data of urban ground objects
  • Sorting method of vehicle-mounted laser scanning point cloud data of urban ground objects
  • Sorting method of vehicle-mounted laser scanning point cloud data of urban ground objects

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Embodiment Construction

[0040] The technical solution of the present invention can adopt computer software technology to realize the automatic operation process. In order to facilitate those skilled in the art to understand and implement the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] refer to figure 1 , an embodiment of the present invention provides a method for classifying urban features of vehicle-mounted laser scanning point cloud data, including:

[0042] Step 1. Combining with the driving track data, perform road surface filtering on the original vehicle laser scanning point cloud data, and separate the road surface point cloud data from other object point cloud data;

[0043] In step 2, the point cloud data of other features obtained in step 1 after excluding the point cloud data of the road surface are further identified as different types of features such as buildings, poles, trees ...

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Abstract

The invention provides a sorting method of vehicle-mounted laser scanning point cloud data of urban ground objects. The method mainly comprises two steps as follows: original vehicle-mounted laser scanning point cloud data are subjected to road surface filtering in combination of vehicle tracking data, and point cloud data of a road surface are separated from point cloud data of other ground objects; and the obtained point cloud data of other ground objects are further identified to be different ground object types. In the road surface filtering algorithm, the vehicle tracking data are combined, and a histogram statistic and analytical method is introduced, so that the self-adaption degree, the automation degree and the accuracy of the filtering algorithm of the road surface in an urban environment are improved greatly; and in the sorting algorithm of other ground objects, a point cloud feature image sorting method based on the maximum elevation value is improved, mistakenly sorted point cloud data are corrected with a cellular automaton technology, and a new thought and method are provided for the sorting algorithms of vehicle-mounted laser scanning point cloud data.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted laser radar, in particular to a method for classifying point cloud data of vehicle-mounted laser scanning. Background technique [0002] In the 1970s, NASA developed the Lidar measurement technology (LIDAR, Light Detection And Ranging), which provided a new technical means for obtaining spatial information. By the 1980s, the University of Stuttgart in Germany combined lidar technology with a timely positioning and attitude determination system, using aircraft as a carrier, and successfully developed an airborne lidar measurement system (ALSS, Airborne Laser Mapping System). In the late 1980s, the vehicle-mounted mobile measurement system (MMS, Mobile Mapping System) with the vehicle as the platform was successfully developed. This technology provides a reliable, flexible and efficient way to quickly collect high-precision 3D data of roads and related features on both sides of the road. H...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06F17/30G01S17/89
Inventor 李霖郭浩蒯希朱海红徐坚黄民发
Owner WUHAN UNIV
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