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Trunk surface model-based trunk volume obtaining method

A technology of surface model and acquisition method, which is used in measurement devices, instruments, optical devices, etc.

Active Publication Date: 2017-06-13
XINYANG NORMAL UNIVERSITY
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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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  • Trunk surface model-based trunk volume obtaining method
  • Trunk surface model-based trunk volume obtaining method
  • Trunk surface model-based trunk volume obtaining method

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0043] Such as figure 1 As shown, the present invention provides a method for obtaining trunk volume based on a trunk surface model, comprising the following steps:

[0044] Step 1, vertically segment the trunk point cloud;

[0045] Step 2, one by one for each vertical segment angle partition and calculate the contour points of the angle partition;

[0046] Step 3, repair the missing contour points of the angle partition;

[0047] Step 4, constructing the surface model of the trunk;

[0048] Step 5, calculate the volume of the trunk according to the surface model of the trunk.

[0049] In one embodiment, the step 1, vertically segmenting the trunk point cloud, includes:

[0050] Calculate the lowest point p in the trunk point cloud with the height as the standard lowest , where z lowest is the lowest point p lowest The height value is the Z-axis...

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Abstract

The invention provides a trunk surface model-based trunk volume obtaining method, which comprises the steps of (1) vertically segmenting a trunk point cloud; (2) gradually carrying out angular partitioning on various vertical sub-segments and calculating contour points of angular partitions; (3) repairing the missing contour points of the angular partitions; (4) building a trunk surface model; and (5) calculating the trunk volume according to the trunk surface model. The accurate contour points of the trunk are obtained through vertical segmenting and angular partitioning, the trunk surface model built on the contour points of the trunk is capable of really reflecting the uneven and curved continuous change process of the trunk and really reflecting the surface profile of the trunk and is not limited by the heights of the sub-segments when the trunk volume is calculated, and basic data are provided for accurate extraction of trunk biomass and carbon stocks and trunk volume optimization.

Description

technical field [0001] The invention relates to a trunk parameter extraction technology, in particular to a trunk volume acquisition method based on a trunk surface model. 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 measuremen...

Claims

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Application Information

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IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 尤磊李小可宋新宇冯岩郭颂
Owner XINYANG NORMAL UNIVERSITY
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