Method for extracting pore structure of whole soil aggregate in CT digital image

A soil aggregate, digital image technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve problems such as a lot of noise and large errors

Active Publication Date: 2020-02-28
ZHEJIANG UNIV
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Problems solved by technology

When the size of the pores in the soil aggregates connected to the external air background is large or the shape is relativ

Method used

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  • Method for extracting pore structure of whole soil aggregate in CT digital image

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Embodiment

[0029] The method for extracting the pore structure of the entire soil aggregate in the CT digital image of the present embodiment is realized based on an existing software module, and includes the following steps:

[0030] 1. Image preprocessing

[0031] The CT digital image of the soil was obtained, and the three-dimensional CT image containing the entire soil aggregate was imported into Image J software, and the redundant images that did not contain the aggregate information were removed through the crop editor to improve the calculation speed. Segmentation of cropped 3D CT images containing intact soil aggregates. The specific principle of image segmentation is to identify and extract the soil solid phase part and pore part in the image according to the difference in gray value of CT image. The gray value of the solid part of the soil in the image is higher, while the gray value of the porous part is lower. Therefore, by selecting a suitable gray value, the two parts of ...

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Abstract

The invention discloses a method for extracting the pore structure of a whole soil aggregate in a CT digital image, and belongs to the technical field of soil structure exploration, and the method comprises the following steps: (1) obtaining the CT digital image of the soil aggregate, and carrying out the preprocessing of the image; (2) performing parameter optimization according to the two characteristics of the image size and the connectivity, and extracting the pore part of the soil aggregate by using an ambient light shielding calculation method. When the soil aggregate image is subjectedto ambient light shielding calculation through the ambient light shielding calculation method, optimizing key parameters of the calculation module, so that the calculation time is shortened, and the calculation efficiency is improved. The image processing efficiency can be greatly improved, the operation time is shortened, and therefore rapid extraction of pores of the whole aggregate is achieved.

Description

technical field [0001] The invention relates to the technical field of soil structure exploration, in particular to a method for extracting the pore structure of the entire soil aggregate in a CT digital image. Background technique [0002] The pore structure of soil aggregates determines many key functions of soil, such as soil carbon sequestration, water and fertilizer retention, water vapor migration, and soil microbial colonization. Therefore, to find out the internal pore structure of the whole soil aggregate has become the research focus of soil science, which has extremely important scientific significance. [0003] However, for many years, the research on the internal pore structure of soil aggregates at home and abroad is based on a certain volume of interest inside the aggregate, and it is impossible to study the pore structure of the entire aggregate. The main reason is that in the whole soil aggregate, there is a part of the pore structure interconnected with th...

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Application Information

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IPC IPC(8): G06K9/00G06K9/34G06K9/46
CPCG06V20/20G06V10/26G06V10/462
Inventor 於修龄卢升高
Owner ZHEJIANG UNIV
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