Three-dimensional green quantity measurement method of single tree based on mobile two-dimensional laser scanning
A two-dimensional laser, three-dimensional green volume technology, applied in measurement devices, optical devices, instruments, etc., can solve the problems of inaccuracy and manual participation in the establishment of crown models, and achieve the effect of high accuracy and fast calculation speed.
Active Publication Date: 2019-04-12
NANJING FORESTRY UNIV
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[0007] The purpose of the present invention is to propose a fast and accurate single tree based on mobile two-dimensional laser scanning in order to solve the problems in the existing three-dimensional green quantity measurement method based on laser technology that the establishment of the crown model is too much manual participation and not accurate enough. Measurement method of three-dimensional green quantity of wood
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[0049] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0050] A single tree three-dimensional green quantity measurement method based on mobile two-dimensional laser scanning. A single tree is scanned from several angles to obtain the complete information of the crown, and the parameter equation of the laser scanning line is established. Based on the criterion that the volume of the crown is the invisible area of the scanning line, the part penetrated by the laser scanning line in the space to be measured is removed, and the unpenetrated part is retained. part, to obtain the canopy volume model, so as to accurately measure the three-dimensional green quantity of a single tree.
[0051] Method of the present invention specifically comprises the following steps:
[0052] Step 1. Obtain tree crown information: Use a mobile two-dimensional laser scanning system to scan a single tree in a straight line at s...
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A single tree three-dimensional green quantity measurement method based on mobile two-dimensional laser scanning. This method uses a mobile two-dimensional laser scanning system to scan a single tree at several angles to obtain complete tree crown information. Information establishes the parameter equation of the laser scanning line, and based on the criterion that the canopy volume is the invisible area of the scanning line, the part penetrated by the laser scanning line in the space to be measured is removed, and the part that is not penetrated is retained to obtain the crown volume model, so as to accurately measure the three-dimensional single tree amount of green. The present invention uses mobile two-dimensional laser scanning to measure the three-dimensional green quantity of a single tree, effectively utilizes all canopy surface points and internal points, and has high accuracy of the volume model; the present invention does not need manual screening and elimination of point clouds, and the calculation speed is fast.
Description
technical field [0001] The invention relates to a method for measuring three-dimensional green quantity of a single tree, in particular to a method for measuring three-dimensional green quantity of a single tree based on laser processing technology, in particular to a method for measuring three-dimensional green quantity of a single tree based on moving two-dimensional laser scanning. Background technique [0002] The three-dimensional green quantity was first proposed as the level of urban landscaping, called "green three-dimensional quantity", which refers to the space volume occupied by the stems and leaves of green plants, expressed in m 3 to calculate. For trees, the three-dimensional green quantity is the canopy volume. Its effective measurement provides useful information for forest resources investigation, forest ecological environment benefit evaluation, and forestry precision management, and is of great significance to the development of modern forestry. [0003] ...
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IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 李秋洁周宏平郑加强赵亚琴张慧春束义平徐波韦雷胡天真孙溪童周敏
Owner NANJING FORESTRY UNIV