Arbor three-dimensional green quantity measuring method based on three-dimensional laser scanner

A three-dimensional green volume and three-dimensional laser technology, applied in photogrammetry/video metrology, instruments, measuring devices, etc., can solve problems such as long cycle, large investment, and difficult implementation

Inactive Publication Date: 2012-01-04
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

[0006] Traditional methods have the disadvantages of heavy workload, low precision, long period, large investment, and it is difficult to truly measure the canopy volume, so it i...

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  • Arbor three-dimensional green quantity measuring method based on three-dimensional laser scanner
  • Arbor three-dimensional green quantity measuring method based on three-dimensional laser scanner
  • Arbor three-dimensional green quantity measuring method based on three-dimensional laser scanner

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Embodiment Construction

[0017] First select a single arbor, set the scanning angle, scanning quality and other parameters in the 3D scanner system, install the laser scanner according to the position, adjacency, and crown shape of the arbor, and place references around the arbor to be scanned. In principle, different scanning stations can clearly separate adjacent standing trees, and the scanning standing trees between different stations can completely see three or more reference spheres, so that the target standing trees can be extracted well ;Use a digital camera to take pictures while scanning at each station to provide a reference for the coverage of adjacent standing trees when extracting data. After all stations are scanned, output data, fit according to the reference sphere, extract each standing tree, and obtain a point cloud data.

[0018] Divide the crown point cloud data of a single tree along the vertical direction from the top of the tree to the bottom of the crown into several equal-hei...

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Abstract

The invention discloses an arbor three-dimensional green quantity measuring method based on three-dimensional laser scanner, comprising the steps of: fitting point cloud data obtained by a three-dimensional laser scanning system at scanning stations in three different directions by a common reference ball to form a complete point cloud of single arbor, and finally generating single arbor crown point cloud data; segmenting the single arbor crown point cloud data from the top to the bottom of the crown into a plurality of sections in same height according to height h, wherein the sections comprises one cone and n circular truncated cones; calculating area of irregular surfaces according to equal distance by the complete single arbor crown point cloud data so as to calculate the volumes of one core and n circular truncated cones; summing the volumes of one core and n circular truncated cones, thereby obtaining the three-dimensional green quantity of single arbor. The method also can be promoted for calculating the three-dimensional green quantity of trees with irregular crowns, and has essential significance for measuring the areal green quantity, the per capita green quantity and the spatial distribution pattern of the green quantity.

Description

1. Technical field [0001] The invention relates to a method for calculating the crown volume of an arbor, that is, the three-dimensional green quantity, in particular to a method for measuring the three-dimensional green quantity of the arbor based on a three-dimensional laser scanner. 2. Technical background [0002] "Green three-dimensional quantity" is also called "green quantity", which refers to the volume of space occupied by the stems and leaves of green plants, in units of m 3 to calculate. Compared with the plane quantity (such as the green coverage rate), the three-dimensional green quantity index can more accurately reflect the rationality of the vegetation composition and the level of ecological benefits, and reflect the overall level of urban greening. It provides a theoretical basis for the study of ecological gardens. Quantitative research on urban landscaping has undergone a qualitative leap, and has attracted the attention of many relevant people in the ind...

Claims

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Application Information

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IPC IPC(8): G01C15/00G01C11/00G06T17/00
Inventor 冯仲科唐雪海姚山刘德庆
Owner BEIJING FORESTRY UNIVERSITY
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