Three-dimensional reconstruction method for soil microstructure

Abstract

The invention discloses a three-dimensional reconstruction method for a soil microstructure. The three-dimensional reconstruction method comprises the following steps: I, acquiring a soil sample: acquiring the soil sample on which three-dimensional reconstruction is required to be performed, wherein the soil sample is a cylindrical soil sample; II, hierarchically scanning the soil sample: hierarchically scanning the soil sample from top to bottom by using a scanning electron microscope, wherein the soil sample is divided into a plurality of scanning surfaces from top to bottom, the scanning electron microscope is adopted during scanning of each scanning surface, and each scanning surface is divided into a plurality of regions for scanning, then a plurality of electron microscope scanning images acquired by scanning are spliced to acquire an entire electron microscope scanning image of the scanning surface; III, sorting the electron microscope scanning images; IV, positioning the images; V, performing three-dimensional reconstruction: calling a three-dimensional reconstruction module to process a plurality of entire electron microscope scanning images to acquire a three-dimensional space model of the soil. The method has the advantages of simple steps, rational design, convenience in implementation and good use effect, and the established soil three-dimensional space model can truly reduce the internal structure of the soil.

Description

technical field [0001] The invention relates to a three-dimensional reconstruction method, in particular to a three-dimensional reconstruction method of soil microstructure. Background technique [0002] At present, there are mainly the following three-dimensional reconstruction methods for soil microstructure at home and abroad: first, restore the three-dimensional geometry of soil from two or more two-dimensional images; second, study the two-dimensional Geometric parameters and their distribution rules, and then use the stochastic simulation method to establish a three-dimensional microscopic soil model; third, use CT technology to reconstruct the microscopic structure of the soil. In actual use, the above-mentioned first method can only restore the three-dimensional shape of the soil surface, but cannot establish a three-dimensional model of the internal structure of the soil; the second three-dimensional reconstruction method only randomly simulates the spatial distribu...

AI Technical Summary

Problems solved by technology

In actual use, the above-mentioned first method can only restore the three-dimensional shape of the soil surface, but cannot establish a three-dimensional model of the internal structure of the soil; the second three-dimensional reconstruction method only randomly simulates the spatial distribution of particles and pores by computer, and cannot restore the real soil microstructure; the cost of the third 3D reconstruction method is high, and the existing CT technology cannot perform 3D reconstruction of the micron-scale soil particle structure, and the scanning accuracy of CT is not as good as that of the scanning electron microscope. There is a big gap

To sum up, the existing 3D reconstruction methods of soil microstructure above all suffer from high cost, poor use effect, low resolution of the built 3D microscopic model of soil, and inability to truly restore the internal microstructure of soil, etc. defects and deficiencies

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