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Tree crown volume and surface area metering technology taking three-dimensional laser scanner as tool

A 3D laser and tree crown volume technology, applied in the field of forest measurement, can solve problems such as low efficiency, long data acquisition cycle, and poor accuracy, and achieve the effect of expanding business fields, reducing the intensity of measurement operations, and accurate measurement

Inactive Publication Date: 2013-09-04
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0004] In order to overcome the disadvantages of long data acquisition period, low efficiency and poor precision of traditional methods, improve efficiency and precision, and realize accurate measurement of tree crown volume and tree crown surface area, the present invention provides a tree crown volume based on a three-dimensional laser scanner as a tool. , Surface area measuring method, it is characterized in that: use three-dimensional laser scanner as a tool to measure trees to obtain point cloud data and record and store, extract the peripheral point cloud in the tree point cloud data by computer, and calculate tree crown volume and surface area by mathematical model

Method used

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  • Tree crown volume and surface area metering technology taking three-dimensional laser scanner as tool

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Embodiment Construction

[0013] The measurement method of canopy volume and surface area based on the three-dimensional laser instrument is different from the existing method, specifically in:

[0014] 1) Extract the peripheral point cloud of trees through the algorithm. The algorithm for extracting the peripheral point cloud is: segment the 3D point cloud data according to the elevation, and place the point cloud within the same elevation 5cm interval in one interval, and in one interval The point cloud data are sorted according to the horizontal direction, and the maximum vertical point (x 1 ,y 1 ,z 1 ) and the coordinates of the smallest vertical point (x 1 ',y 1 ',z 1 ′), and record the area enclosed by point cloud intervals within the same elevation range S = Σ i = 1 n ( y i - y ...

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Abstract

The invention provides a tree crown volume and surface area metering technology taking a three-dimensional laser scanner as a tool. The three-dimensional laser scanner is used as the tool to measure tree point cloud data and a peripheral point cloud in the tree point cloud data is extracted through an algorithm; and the measurement and calculation of a tree crown volume and a surface area can be realized through a computational formula, so as to greatly improve the computational accuracy of the tree crown volume and the surface area, and overcome the defects that the precision is low, and the process is complicated when the precision is high of a previous method for metering the tree crown volume and the surface area.

Description

1. Technical field [0001] The invention relates to a forest measurement method using a three-dimensional laser scanner as a tool, in particular to the measurement of tree crown volume and surface area using a three-dimensional laser scanner as a tool. 2. Technical background [0002] Traditional forest measurement techniques are backward, based on manual operations such as angle gauge measurement, felled wood analysis, and aerial photo interpretation. The cycle is long, the efficiency is low, and the accuracy is poor, which is far from being suitable for the monitoring of forest resources and ecological environment. need. Domestic forest monitoring is limited to the macroscopic and extensive stage with remote sensing and conventional ground survey as the main technology. The precise measurement of certain indicators, such as the theory, technology, and instrumentation of forest stand data acquisition such as canopy volume and surface area, are far from being resolved to a s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01B11/28
Inventor 冯仲科郑君杨伯钢
Owner BEIJING FORESTRY UNIVERSITY
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