Single-tree three-dimensional green quantity measuring method based on mobile two-dimensional laser scanning

Abstract

The invention relates to a single-tree three-dimensional green quantity measuring method based on mobile two-dimensional laser scanning. The single-tree three-dimensional green quantity measuring method comprises scanning a single tree from several angles by means of a mobile two-dimensional laser scanning system, obtaining complete information of a tree crown, establishing a laser scan line parameter equation by means of information comprising a moving track linear equation and the moving speed, removing the part, of a space to be detected, which is penetrated by laser scan lines based on the principle that the volume of the tree crown is equal to that of the area where scan lines are invisible, reserving the part which is not penetrated by laser scan lines, obtaining a tree crown volume model, and therefore measuring the single-tree three-dimensional green quantity accurately. According to the invention, the single-tree three-dimensional green quantity is measured by means of mobile two-dimensional laser scanning, surface points and internal points of all crown layers are effective utilized, and the accuracy of the volume model is high. According to the invention, manual screening for rejecting the point cloud is not needed, and the computing speed is high.

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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Problems solved by technology

[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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