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A method for constructing a tree trunk volume estimation model, volume estimation method and system

A technology for estimating models and building methods, which is applied in computing, computer components, character and pattern recognition, etc., and can solve problems such as portability and wide applicability, high cost of use, heavy workload, etc., to achieve modeling work The effect of small amount, short time consumption and high model accuracy

Inactive Publication Date: 2019-01-11
成都中科君安信息技术有限公司 +1
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Problems solved by technology

If the point cloud model of an object is constructed using multi-angle photos, the workload is relatively large, and the effect of the generated model is limited by the number, angle and definition of the photos; 3D scanners such as Kinect are mainly used indoors, and outdoor sampling is affected by the sun. The limitations of light and power supply are large, and the portability and wide applicability need to be improved; laser scanning technology is suitable for large-scale forest research, but the accuracy of fine-grained individual wood research is limited, and the cost of use is high

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  • A method for constructing a tree trunk volume estimation model, volume estimation method and system
  • A method for constructing a tree trunk volume estimation model, volume estimation method and system
  • A method for constructing a tree trunk volume estimation model, volume estimation method and system

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Embodiment approach

[0052] As an embodiment of the present invention, the MeshLab visual data processing tool is used to visualize the sampled tree trunk point cloud data, and the visualized effect map is used to match the pictures taken in the field to ensure the accuracy of subsequent model construction.

[0053] As an embodiment of the present invention, when performing point cloud data preprocessing, first perform matching processing to ensure correctness, and then perform processing to delete redundant point cloud data other than tree trunks to further ensure the accuracy of subsequent model construction.

[0054] As an embodiment of the present invention, the specific method for calculating the volume of each layer through the method of cross-sectional integration includes:

[0055] Using the point cloud data including x-axis, y-axis and z-axis information, the point cloud of a single tree trunk with a height of H is horizontally divided into n slices along the vertical direction (y-axis dir...

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Abstract

The invention provides a method for constructing a tree trunk volume estimation model, a volume estimation method and a system, wherein, method for constructing a tree trunk volume estimation model comprises the steps of three-dimensionally scanning individual trees, and sampling point cloud data of a tree trunk; conducting point cloud data preprocessing, including deleting redundant point cloud data outside the tree trunk; in the vertical direction, dividing the trunk point cloud data into n layers horizontally, and calculating the volume of each layer slice by the method of cross-sectional area integral, then the volume of n layers is superposed to obtain the volume of the whole tree trunk. The trunk volume model of trunk volume and trunk model factor was constructed by using the trunk model factor and the calculated volume result and linear regression analysis to fit the trunk model. Compared with the prior art, the invention reduces the destruction to the forest, improves the accuracy of modeling, and can realize the accurate modeling of irregular objects, the modeling workload is small, the time consuming is short, and the timeliness of modeling can be satisfied.

Description

technical field [0001] The invention relates to the field of tree volume estimation, in particular to a method for constructing a tree trunk volume estimation model, a volume estimation method and a system. Background technique [0002] Tree trunk volume is an important indicator for monitoring the flow of energy and nutrients in ecosystems. Accurate tree trunk volume is of great significance for calculating forest volume and annual changes in biomass. At present, the estimation methods of tree volume mainly have the following implementation methods: [0003] The first method: the volume method, by imagining the trunk as a regular shape, measuring the tree height, diameter at breast height and its derived factor parameters to construct the volume model of the tree. The volumetric method has little damage to trees, but the calculation is done by assuming that the trunk is a regular shape, and the processing is relatively rough, and the estimation accuracy is low. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/62G06K9/62
CPCG06T7/62G06T2207/10028G06F18/22
Inventor 黄运梅侯松林杨凡
Owner 成都中科君安信息技术有限公司
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