Heterogeneous rock core three-dimensional reconstruction method based on super dimension

A 3D reconstruction, heterogeneous technology, applied in the field of 3D image reconstruction

Active Publication Date: 2018-11-06
SICHUAN UNIV
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Problems solved by technology

However, the original hyperdimensional reconstruction method can only be used for the reconstruction of h

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  • Heterogeneous rock core three-dimensional reconstruction method based on super dimension
  • Heterogeneous rock core three-dimensional reconstruction method based on super dimension
  • Heterogeneous rock core three-dimensional reconstruction method based on super dimension

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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 heterogeneous rock core three-dimensional reconstruction method based on super dimension. The heterogeneous rock core three-dimensional reconstruction method based on superdimension is based on a three-dimensional modeling problem of a porous medium two-dimensional image, utilizes the advantage that the super dimension uses a real rock core to establish a dictionary, and reconstructs a heterogeneous rock core through prior information. The heterogeneous rock core three-dimensional reconstruction method based on super dimension includes the specific steps: bringing forward introduction of a probability-based image block selection mechanism, establishing the corresponding relationship between a two-dimensional image block and the number of 0 element in a three-dimensional image block in the real rock core in the super dimension reconstruction dictionary, and selecting the elements in the dictionary through a probability selection method so as to maintain the heterogeneous information; at the same time, introducing a mechanism of randomly reconstructing an origin to eliminate the phenomenon that the heterogeneous cluster is diffused to the homogeneous cluster when a heterogeneous rock core is established through an original super dimension reconstruction algorithm; and based on the above steps, providing a heterogeneous reconstruction algorithm. The reconstructed three-dimensional heterogeneous rock core structure can preferably maintain the heterogeneous characteristic of the two-dimensional reference image and provide a good explanation for a realrock 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...

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Application Information

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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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