Reconstructed soil computer tomography (CT) picture three-dimensional reconstruction and soil pore searching method

A technology of 3D reconstruction and search method, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as soil pores, complex structure and limitations that cannot be reflected intuitively and accurately, and achieve the effect of convenient writing and debugging

Inactive Publication Date: 2015-09-23
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Description
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AI Technical Summary

Problems solved by technology

However, soil pores have a complex structure. The traditional soil pore research methods are limited to two-dimensional planes, which cannot directly and accurately reflect the soil pore conditions, and the soil slice method is mostly used, and the non-destructive and high-precision CT scanning technology is rarely used. Therefore, combined with CT scanning technology, the three-dimensional and quantitative research on reconstructed soil pores is a new technology that urgently needs to be broken through.

Method used

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  • Reconstructed soil computer tomography (CT) picture three-dimensional reconstruction and soil pore searching method
  • Reconstructed soil computer tomography (CT) picture three-dimensional reconstruction and soil pore searching method
  • Reconstructed soil computer tomography (CT) picture three-dimensional reconstruction and soil pore searching method

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Select 19 consecutive CT scan pictures of the 0-25cm soil layer in the south dump of Pingshuo mining area in Shanxi Province (which has been reclaimed for 23 years), import them into matlab, input the length and width of the selected area, and determine the area for 3D reconstruction, see figure 2 , and then call the main function of the 3D reconstruction to get the 3D reconstruction image as image 3 As shown, next, binarize the 3D reconstruction map, use Arcgis software to select a threshold value of 64, redraw and reconstruct the soil pores, and obtain a 3D stereogram of the reconstructed soil pores as shown in Fig. Figure 5 As shown, search for the number of soil pore clusters and the number of pixels contained in each pore cluster, output the results, and finally calculate the porosity of the reconstructed area.

[0072] There are a total of 707 pore clusters in this search, the minimum number of pore cluster pixels is 1, and the maximum pore cluster pixel number...

Embodiment 2

[0076] Select 25 continuous CT scan pictures of the 0-25cm soil layer in the inner dump site (not reclaimed), the specific operation is the same as that of the implementation case 1, and the threshold value is selected by using AutoCAD software to be 50, and the three-dimensional reconstruction picture is obtained as follows Figure 4 As shown, the reconstructed 3D stereogram of soil pores is as follows Figure 6 shown. There are a total of 927 pore clusters in this search, the minimum number of pore cluster pixels is 1, and the maximum pore cluster pixel number is 1309. The size distribution of pore clusters is shown in Table 2, and the porosity is 0.0309.

[0077] Table 2 Distribution of pore clusters in the 0-25cm soil layer of the inner dump

[0078] distribution range

Embodiment 3

[0080] Select 20 continuous CT scan pictures of 25-50cm soil layer in the south dump of Pingshuo mining area in Shanxi (which has been reclaimed for 23 years), import them into matlab, input the length and width of the selected area, and determine the area for 3D reconstruction, see figure 2 , get the 3D reconstruction image as Figure 5 As shown, next, binarize the 3D reconstruction map, use Arcgis software to select a threshold value of 68, redraw and reconstruct the soil pores, and obtain the 3D stereogram of the reconstructed soil pores as shown in Fig. Figure 9 As shown in , search for the number of soil pore clusters and the number of pixels contained in each pore cluster, output the results, and finally calculate the porosity of the reconstructed area.

[0081]There are 930 pore clusters in this search, the minimum number of pore cluster pixels is 1, and the maximum pore cluster pixel number is 347347. The size distribution of pore clusters is shown in Table 3, and th...

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Abstract

The invention relates to a reconstructed soil computer tomography (CT) picture three-dimensional reconstruction and soil pore searching method. The method comprises four steps of soil CT scanning, construction of a three-dimensional reconstruction picture, reconstruction of a soil pore three-dimensional picture and searching of soil pore clusters. Through adoption of the method, the three-dimensional picture of the reconstructed soil can be realized, spatial form distribution and connectivity of pores can be observed intuitively, quantity and volume of the soil pore clusters can be searched, a basis can be provided for selection of refuse dump soil reconstruction methods and vegetation restoration measures, a guidance can be provided for land rehabilitation, and the socioeconomic benefits of land rehabilitation in a mine area can be improved. Through adoption of the method, three-dimensional reconstruction of soil pores can be completed, the three-dimensional distribution and connectivity of soil pores can be observed intuitively, and a new technological method is provided for quantitative research of reconstructed soil pores.

Description

technical field [0001] The invention relates to the technical field of three-dimensional graphics generation, in particular to a method for three-dimensional reconstruction of a reconstructed soil CT picture and a soil pore search method. Background technique [0002] China is the world's largest coal producer and consumer. In recent years, my country's open-pit coal output has increased from 4% to 30%. Most of the open-pit coal mines are distributed in ecologically fragile areas such as the Loess Plateau. The natural conditions in this area are harsh, the soil is barren, the vegetation is sparse, the water resources are extremely scarce, and the ecological environment is extremely fragile. It is a typical arid and semi-arid area. The mining of open-pit coal destroys surface vegetation, aggravates soil loss and degradation, damages the ecological landscape of the mining area, poses a great threat to the ecological system, and seriously restricts the social and economic devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
Inventor 王金满秦倩郭凌俐王洪丹宋杨睿万德鹏王大为张莉张佳瑞路晓
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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