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3D Reconstruction Method of Heterogeneous Core Based on Hyperdimension

A 3D reconstruction, heterogeneous technology, applied in 3D modeling, instrumentation, computing, etc.

Active Publication Date: 2021-08-24
SICHUAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the original hyperdimensional reconstruction method can only be used for the reconstruction of homogeneous media, and it is a kind of random heterogeneity for the reconstruction of heterogeneous media.

Method used

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  • 3D Reconstruction Method of Heterogeneous Core Based on Hyperdimension
  • 3D Reconstruction Method of Heterogeneous Core Based on Hyperdimension
  • 3D Reconstruction Method of Heterogeneous Core Based on Hyperdimension

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Embodiment

[0041] In order to make the hyperdimensional-based heterogeneous core three-dimensional reconstruction method of the present invention easier to understand and close to real application, the following selects the original CT image sequence as a training set and establishes a corresponding dictionary, and establishes a dictionary in the hyperdimensional concept The introduction of probability-based image block selection mechanism in the reconstruction phase, the random reconstruction starting point strategy in the reconstruction phase, and the operation flow of a series of procedures for using these strategies to reconstruct heterogeneous cores in the reconstruction process will be described as a whole.

[0042] The specific operation steps are as follows:

[0043] (1) Select the training set. The three-dimensional structure of the real core can be regarded as a sequence of accumulation of single two-dimensional images. The CT sequence images (one or more groups of images) of ...

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Abstract

The invention relates to a method for three-dimensional reconstruction of heterogeneous rock core based on hyperdimension. This method is based on the 3D modeling problem of 2D images of porous media, and utilizes the advantage of using hyperdimensional real cores to build a dictionary, and reconstructs heterogeneous cores through prior information. Specifically, it is proposed to introduce a probability-based image block selection mechanism to establish the corresponding relationship between the two-dimensional image blocks in the hyperdimensional reconstruction dictionary and the number of 0 elements in the corresponding three-dimensional image blocks in the real rock core, and to select the elements in the dictionary by the method of probability selection. to maintain heterogeneous information. At the same time, by introducing the mechanism of random reconstruction starting point, it eliminates the phenomenon that heterogeneous clusters diffuse to homogeneous clusters when the original hyperdimensional reconstruction algorithm builds heterogeneous cores. On this basis, we give a heterogeneous reconstruction algorithm. The reconstructed 3D heterogeneous core structure can well maintain the heterogeneity characteristics of the 2D reference image, providing a good explanation for the real core microstructure.

Description

technical field [0001] The invention relates to a three-dimensional modeling method based on two-dimensional images, in particular to an ultra-dimensional three-dimensional reconstruction method for heterogeneous rock cores, belonging to the technical field of three-dimensional image reconstruction. Background technique [0002] Traditionally, we study the physical properties of porous media through physical property experiments, but the method is too complicated. Recently, the digital three-dimensional structure of porous media has become an important means for people to study the physical properties of porous media. People usually reconstruct its three-dimensional structure by obtaining a single two-dimensional image. At present, many methods have been proposed to reconstruct three-dimensional porous media, including multi-point geostatistical algorithm, simulated annealing algorithm, Gaussian random field reconstruction algorithm and so on. Most of these reconstruction m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 滕奇志李洋何小海冯俊羲卿粼波余艳梅
Owner SICHUAN UNIV
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