Rock core shape-preserving three-dimensional reconstruction method

A 3D reconstruction and core technology, applied in the field of 3D reconstruction, can solve the problems of difficulty in maintaining the original characteristics of the core, large investment in personnel and equipment, etc., and achieve the effect of maintaining the original state, high degree of automation, and low cost

Inactive Publication Date: 2014-09-24
CENT SOUTH UNIV
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Problems solved by technology

Since this method is carried out after the core has been transported, cut, liquid washed, etc., it is difficult to maintain the original characteristics

Method used

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  • Rock core shape-preserving three-dimensional reconstruction method
  • Rock core shape-preserving three-dimensional reconstruction method
  • Rock core shape-preserving three-dimensional reconstruction method

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[0014] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0015] A core shape-preserving three-dimensional reconstruction method. It uses a calibrated measuring camera to shoot at multiple angles to obtain the holographic image information of the core shape. Then, according to the dense surface modeling technology, the image is scanned and analyzed with the help of a high-performance computer. Obtain the high-density point cloud on the surface of the core, and complete the meshing and automatic filling of the core surface through effective discrimination of the point cloud, thereby completing the 3D reconstruction of the core. The specific steps are as follows: including the following steps: the first step: select the required The reconstructed core body is placed in a horizontal position; the second step: using a calibrated measuring camera, taking the core as the center of the circle, and changing th...

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Abstract

The invention relates to a rock core shape-preserving three-dimensional reconstruction method. The method comprises the steps that holographic image information of the contour of a rock core is obtained through multi-angle shooting of a calibrated measurement camera, and then a high-density point cloud on the surface of the rock core is obtained by means of scanning analysis of a high-performance computer on images according to the dense curve modeling technology; gridding and automatic filling of the surface of the rock core are completed through effective determination of the point cloud, and therefore the three-dimensional reconstruction of the rock core is completed. Compared with a traditional rock core characterization method, a large amount of three-dimensional information of the rock core with the original shape can be obtained instantly, no rock core shape selectivity exists, no special handling is needed, the original shape of the rock core can be well kept, the cost is low, operation is convenient and fast, the degree of automation is high, on-site quantitative analysis can be carried out on a coring site, the defects of existing methods are effectively overcome, and the rock core shape-preserving three-dimensional reconstruction method is efficient, fast, low in cost, accurate and reliable.

Description

technical field [0001] The invention relates to a shape-conserving three-dimensional reconstruction method for rock cores, in particular to a three-dimensional reconstruction method mainly used for characterizing original rock cores in exploration work in the fields of geology, oil and gas, engineering, non-ferrous metals, and coal. Background technique [0002] Cores are samples that characterize formations at different depths below the ground or at different positions at the same depth. They are the main research objects of geological surveys, oil and gas exploration, mineral exploration, and engineering exploration. Therefore, it is extremely important to characterize undisturbed cores. The existing characterization methods mainly adopt the method of on-site core recording and later core scanning. [0003] On-site rock core cataloging is mainly to qualitatively describe and record the geometric shape, particle size, mineral type, fracture type, sample color, etc. of the c...

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Application Information

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IPC IPC(8): G06T17/00
Inventor 曹函孙平贺张绍和
Owner CENT SOUTH UNIV
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