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Method for automatically mapping field ridge of mountain area in three-dimensional laser point clouds

A three-dimensional laser and point cloud technology, applied in image data processing, instrumentation, computing and other directions, can solve the problem of automatic extraction of fields without mountainous areas, and achieve the effect of reducing point cloud holes and noise, reducing influence, and improving accuracy and efficiency.

Active Publication Date: 2016-02-10
GUIZHOU SURVEY & DESIGN RES INST FOR WATER RESOURCES & HYDROPOWER
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Problems solved by technology

At present, there is no method for automatic extraction and compilation of field ridges in mountainous areas.

Method used

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  • Method for automatically mapping field ridge of mountain area in three-dimensional laser point clouds

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Embodiment

[0041] Such as figure 1 As shown, the present invention is a method for automatically editing and drawing mountainous field ridges in a three-dimensional laser point cloud. The specific steps of the method are as follows:

[0042] Step 101: Obtain the point cloud data of mountainous field ridges, and perform data preprocessing, including data splicing and data format conversion, and removal of surface vegetation and noise;

[0043] The laser scanner was used to collect data in the mountainous Duotiankan area, and the related software RISCANPRO software was used to stitch the data, remove the vegetation and noise on the surface, and filter the point cloud data according to certain parameters, and then convert the data into .DGN format data.

[0044] Step 102: On the basis of Mircrostationv8, carry out secondary development, and use the three-dimensional space clustering algorithm based on probability theory to automatically find the ridge point;

[0045] The main steps of the ...

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Abstract

The present invention discloses a method for automatically mapping a field ridge of a mountain area in three-dimensional laser point clouds. The method comprises: acquiring point cloud data of a mountainous field, and performing data pre-processing; using Delaunay triangle net side length and vertex elevation as constraint conditions, proposing a three-dimensional space clustering method based on a probability theory, and performing space clustering on three-dimensional point cloud data; determining a point cloud cluster type, and distinguishing field ridge and ridge; connecting the vertexes of the field ridge, and fitting the vertexes according to a certain rule; and giving symbol of the field ridge or the ridge and outputting the symbol. The method disclosed by the present invention implements automation of three-dimensional point cloud field ridge mapping, improves three-dimensional point cloud data processing efficiency and precision of multi-field-ridge regions of the mountain area, and has a relatively good practical value and application prospect in the field of three-dimensional point cloud data processing and measurement mapping technologies.

Description

technical field [0001] The invention relates to a method for automatically compiling and drawing mountainous field ridges in a three-dimensional point cloud, and belongs to the technical field of three-dimensional point cloud data processing and measurement and drawing. Background technique [0002] In surveying and mapping, 3D laser scanning technology provides a new tool and method for topographical surveying and geological research, which has the characteristics of high precision of measurement points, high density of collected space points, and fast speed. [0003] However, there are not many ways to automatically and efficiently extract and compile ground object information in 3D point cloud data. The feature extraction and editing functions in some software are only applicable to the automatic extraction of regular building outlines in some cities, and are helpless for the ground features in the surveying and mapping project in Guizhou mountainous areas, especially for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
Inventor 徐锐罗天文吴恒友王陆军
Owner GUIZHOU SURVEY & DESIGN RES INST FOR WATER RESOURCES & HYDROPOWER
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