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Laser point cloud data-based trunk volume acquiring method

A technology of laser point cloud data and acquisition methods, applied in the direction of using optical devices, measuring devices, instruments, etc.

Active Publication Date: 2017-07-07
XINYANG NORMAL UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

However, the shape of the trunk is irregular, and the simplified structure of the rotating body oversimplifies the geometry of the trunk. The volume of the trunk calculated on this basis must be different from the real volume of the trunk. Because of this, how to accurately calculate the volume of the trunk It is a question that forestry workers have been concerned about

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  • Laser point cloud data-based trunk volume acquiring method
  • Laser point cloud data-based trunk volume acquiring method
  • Laser point cloud data-based trunk volume acquiring method

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0049] Such as figure 1 As shown, the present invention provides a method for obtaining trunk volume based on laser point cloud data, comprising the following steps:

[0050] Step 1, vertically segment the trunk point cloud;

[0051] Step 2, calculating the volume of each vertical segment one by one;

[0052] Step 3, calculate the cumulative sum of all vertical segment volumes.

[0053] Step 1, vertically segment the trunk point cloud, including:

[0054] According to the z-axis coordinates, that is, the height value, calculate the lowest point p in the trunk point cloud lowest , set the lowest point p lowest The Z axis coordinate is z lowest , and calculate the height of the trunk based on the lowest point;

[0055] build plane π 0 with π 1 , whose equations are respectively z=z lowest with z=z lowest +thickness, where thickness is the heigh...

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Abstract

The present invention discloses a laser point cloud data-based trunk volume acquiring method. The method comprises the following steps that: step 1, trunk point cloud is vertically segmented; step 2, the volume of each vertical segment is calculated one by one; step 3, and the cumulative sum of the volume of all the vertical segments is calculated. According to the laser point cloud data-based trunk volume acquiring method of the invention, on the basis of obtaining the contour of the section of a trunk, the trunk volume of each trunk segment is accurately calculated through accurately calculating the cross-sectional area of the section of the trunk, and therefore, the method has high accuracy, and basic data can be provided for the accurate extraction of the biomass and carbon storage of the trunk and the optimization of measurement of the trunk.

Description

technical field [0001] The invention relates to a trunk parameter extraction technology, in particular to a trunk volume acquisition method based on laser point cloud data. Background technique [0002] Terrestrial Laser Scanning Technology (TLS for short) is a new type of surveying and mapping technology, which was born in the 1990s. TLS can quickly and accurately obtain point cloud data information on the surface of the target object, so that the 3D model of the target object can be quickly constructed. After nearly 20 years of development, the 3D laser scanner has been able to continuously and rapidly perform non-contact measurement of the observed object. It obtains a large amount of 3D point cloud data on the surface of the object by obtaining the distance from the object surface to the scanner and the emission intensity. Using TLS to extract forestry related parameters has been a research hotspot in the past 10 years. [0003] Trunk volume is the basic tree measureme...

Claims

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Application Information

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IPC IPC(8): G01B11/00
CPCG01B5/0035G01B11/00
Inventor 尤磊宋新宇冯岩郭颂李小可
Owner XINYANG NORMAL UNIVERSITY
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