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Decomposition model library forest three-dimensional scene simulation method

A technology of three-dimensional scenes and simulation methods, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as difficulty in obtaining forest tree data, failure to meet user's refined forest management interaction needs, complex forest environment, etc., to achieve improved Generate efficiency, improve participation and awareness, and meet application requirements

Inactive Publication Date: 2022-03-11
RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY
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AI Technical Summary

Problems solved by technology

[0003] The current 3D tree modeling technology has been relatively mature with the development of computer graphics and imaging. However, due to the difficulty in obtaining real tree data and the complexity of the forest environment, the 3D model of trees constructed by most methods is an isolated whole, which cannot meet the needs of users. Interaction needs of standardized forest management

Method used

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  • Decomposition model library forest three-dimensional scene simulation method
  • Decomposition model library forest three-dimensional scene simulation method
  • Decomposition model library forest three-dimensional scene simulation method

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Experimental program
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Embodiment 1

[0025] Embodiment 1: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 and Figure 7 As shown, a method for simulating a 3D forest scene with a decomposed model base mainly includes two aspects: the construction of the decomposed model base and the construction of the spatial matching points of the forest shape and structure. The overall technical process is as follows: figure 1 shown.

[0026] The operation steps are as follows:

[0027] Step 1. Decompose model library construction

[0028] (1) Construction of tree trunk parameter model

[0029] d=f(D,H,h)

[0030] In the formula, H represents the height of the tree, D represents the diameter at breast height, h represents the height of a certain position of the trunk, and d represents the diameter of the corresponding trunk at this height.

[0031] (2) Construction of tree trunk 3D model library

[0032] Using SpeedTree plant modeling software, the diameter data were fitted according to the tru...

Embodiment 2

[0070] Embodiment 2: as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 and Figure 7 Shown is a method for simulating 3D scene of forest with decomposition model base, and an example of 3D scene simulation of fir decomposition model base in Jiangxi Shanxia Forest Farm.

[0071] Step 1. Data collection:

[0072] A fir forest land with a relatively flat terrain was selected from the forest farm under the mountain as a temporary sample plot. The size of the sample plot was 50m×50m. There were 229 Chinese fir trees in the sample plot that were 15 years old.

[0073] Collect accurate tree relative spatial coordinates, tree attribute data and texture images.

[0074] Using the conventional tree measuring method, use the girth to measure the diameter at breast height of the tree, use the height measuring pole and the laser altimeter to obtain the height under the branches, the crown height and the tree height of the tree, and use the tower ruler to measure ...

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Abstract

The invention discloses a decomposition model library forest three-dimensional scene simulation method, and belongs to the technical field of forest visualization simulation in forestry scientific research. A decomposition model library is constructed, specifically, a trunk parameter model is constructed, a trunk three-dimensional model library is constructed, and a branch system three-dimensional model library is constructed; forest morphological structure space matching points are constructed, and a crown curve, a branch elevation angle, a branch wheel number, a branch wheel position, a branch growth number, a branch length and a branch base diameter are determined; and according to the collected data, cyclically calling related Chinese fir attributes, generating Chinese fir morphological structure space matching points, matching models in a Chinese fir decomposition model library, and dynamically generating a Chinese fir stand three-dimensional scene. The method is good in effect, not only improves the forest stand three-dimensional scene generation efficiency, but also realizes the characteristics that the forest forms in the forest stand scene have certain distinction degree and the branches can be dynamically regulated and controlled. The participation sense and cognition degree of forestry research and related teaching are improved, and the application requirements of grassroots forestry can be met.

Description

technical field [0001] The invention relates to a method for simulating a three-dimensional scene of a forest with a decomposed model library, which belongs to the field of forest visualization simulation in forestry scientific research, that is, the field of computer technology, and relates to the forest tree form structure theory in forestry and visualization simulation technology in computer science. Background technique [0002] Forest visualization simulation is based on forestry theory, using cutting-edge computer visualization simulation technology as a means to construct a three-dimensional forest simulation scene that conforms to the laws of reality, and provides interactive objects and platforms for forest management visualization simulation. At present, forest visualization simulation can be roughly divided into three categories according to data acquisition and modeling methods: the first category is the construction of tree 3D model based on parameters, the secon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 张怀清朱念福杨廷栋
Owner RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY
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