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Excavation slope rock information extraction and three-dimensional reconstruction method

A technology of information extraction and three-dimensional reconstruction, applied in image enhancement, image analysis, instruments, etc., can solve the problems of large errors, low efficiency of manual measurement, and inability to measure directly, so as to improve efficiency, reduce labor and danger, Highly Accurate and Realistic Effects

Inactive Publication Date: 2017-06-06
WUHAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for extracting and three-dimensional reconstruction of rock block information on excavated slopes, which can truly obtain the shape and block size distribution of rock blocks exposed on the excavated slope surface, and overcome the low efficiency, large errors, and problems of manual measurement. The disadvantage that most parts of the slope surface cannot be directly measured can provide a basis for the support design of the excavated slope

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  • Excavation slope rock information extraction and three-dimensional reconstruction method
  • Excavation slope rock information extraction and three-dimensional reconstruction method
  • Excavation slope rock information extraction and three-dimensional reconstruction method

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[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] Such as Figure 2-6 As shown, a method for information extraction and three-dimensional reconstruction of excavated slope rock blocks includes the following steps:

[0033] (1) Arrange control points in the scanning area of ​​excavated side slope (see figure 2 ), in theory, only 3 control points are needed, and more than 3 control points can be arranged in actual operation to reduce the splicing error. The selection of control points can be prominent stone corners, measuring points marked by paint, or matching targets for scanners;

[0034] Use the total station to measure the coordinates of the control points and form a global coordinate file of the control points;

[0035] (2) Right in front of the slope, scan the rock mass from different stations (see image 3 ) to ensure that all rock masses can be scanned, and obtain multiple l...

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Abstract

The invention discloses an excavation slope rock information extraction and three-dimensional reconstruction method. The method mainly comprises the steps that three-dimensional laser scanning point cloud data of an excavation slope surface are acquired; structural surface geometrical information of a slope rock is extracted by a Ransac algorithm; a rock block formed by the structural surfaces is extracted by using space geometry, a Flood Fill algorithm and a coding classification method; and a rock three-dimensional digital model is reconstructed and calculation and statistics are performed on the rock volume and blockness distribution information. The rock block information of the excavation slope surface can be automatically extracted so that the degree of block development formed by cutting of the structural surfaces can be visually reflected, and the defects of time consumption and labor consumption of manual measurement can be overcome; and the degree of integrity of the rock can be evaluated according to the extracted statistical information of the rock so as to provide the basis for the support design of the excavation slope.

Description

technical field [0001] The invention belongs to the technical field of slope engineering, and in particular relates to a method for extracting and three-dimensional reconstruction of excavated slope rock block information. Background technique [0002] The integrity and stability assessment of the rock mass exposed by the excavation slope and the rock mass of the excavation slope is of great significance to the design of the reinforcement and support scheme of the slope. [0003] For the rock blocks exposed by excavation slopes, traditional methods are mainly based on manual measurement or the establishment of random structural plane networks to extract blocks. Due to the development of structural planes on the excavation slope, the number of blocks formed by the combination of structural planes is huge. The traditional manual measurement method cannot count the block distribution of all rock blocks on the excavation slope. The excavation height reaches 15-20m, and most s...

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Application Information

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IPC IPC(8): G06T15/10G01B11/00
CPCG06T15/10G01B11/00G06T2207/10028
Inventor 姜清辉陈娜金伟孙金山周创兵
Owner WUHAN UNIV
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