Method capable of calculating standing tree volume by using laser radar point cloud data based on improved Hough change

Abstract

The invention discloses a method capable of calculating the standing tree volume by using laser radar point cloud data based on an improved Hough change. Tree point cloud data are obtained by taking athree-dimensional laser scanner as a tool, and by performing slice processing on high point cloud data of any tree, slice point cloud data are projected into a same horizontal plane and transformed into a grid map. By using a Hough transformation method, a fitting circle of the slice point cloud data is extracted as the diameter of a trunk at the place, and then the trunk volume is calculated byusing a sectional area differentiating quadrature method. According to the method, the flexibility and the high efficiency of the three-dimensional laser scanner are fully utilized, the cost of fieldinvestigation is reduced, the defect of invalid accumulation of random Hough transformation in previous research is overcome, and the efficiency and the precision of calculating standing tree volume field operation and interior processing are improved.

Description

[0001] 1. Technical field [0002] The invention relates to a method for investigating forest resources, in particular to a method for calculating the volume of a standing tree based on improved Hough-variable lidar point cloud data. [0003] 2. Technical background [0004] Standing volume is the basic unit of stand volume and the main basis for measuring the results of volume. The traditional standing tree volume generally uses measuring tools such as diameter rulers and height measuring devices to survey plots. When estimating, standard wood diameters at breast height and tree heights are used to query the volume table. However, the above methods have many shortcomings in the actual operation of field surveys: [0005] ① The efficiency of the method is not high; [0006] ②Manual labor intensity is high; [0007] ③ The calculation error is relatively large; [0008] The above defects are due to the fact that the basic connotation and survey methods of standing volume have ...

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Problems solved by technology

[0005] ① The efficiency of the method is not high;

[0006] ②Manual labor intensity is high;

[0007] ③ The calculation error is relatively large;

[0008] The above defects are all due to the fact that the basic connotation and survey methods of standing volume have not received enough attention, and there are problems such as vague concepts and extensive calculation methods, which make it difficult to meet the needs of forestry production and ecological construction with increasing standards.

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