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Wavelet transform model parameter disturbance method

A perturbation method and model parameter technology, applied in 3D modeling, image data processing, complex mathematical operations, etc., can solve problems such as model errors and achieve the effect of precise perturbation

Active Publication Date: 2021-01-19
CENT SOUTH UNIV
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Problems solved by technology

But if you directly operate on the nodes in the tree structure (especially adding nodes), then the model obtained by direct wavelet reconstruction is wrong

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  • Wavelet transform model parameter disturbance method
  • Wavelet transform model parameter disturbance method
  • Wavelet transform model parameter disturbance method

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Embodiment Construction

[0055] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

[0056] see figure 1 with figure 2 As shown, a wavelet transform model parameter perturbation method provided by the present invention concentrates the perturbation of the geophysical model obtained after the transformation on the local tree structure sub-nodes to represent the high-frequency detail information of the model, and the transformed The obtained geophysical model perturbation covers the entire model area, and the root node of the tree structure is represented as the low-frequency approximation information of the model. The tree structure and the geophysical model are converted by wavelet transform to realize the decomposition of the geophysical model or refactor.

[0057] Preferably, the wavelet transform is a multi-resolution wavelet transfo...

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Abstract

The invention provides a wavelet transform model parameter disturbance method, which specifically comprises the following steps of: centralizing disturbance of a geophysical model obtained after transform on a local tree-shaped structure sub-node (with larger depth) to express as high-frequency detail information of the model; expressing a tree-shaped structure root node (with smaller depth) covering the whole model area by disturbance of the geophysical model obtained after transformation as low-frequency approximate information of the model, and transforming the tree-shaped structure and thegeophysical model through wavelet transformation so as to achieve decomposition or reconstruction of the geophysical model. According to the method provided by the invention, accurate local disturbance on different scales and different regions of the geophysical model can be correctly achieved by increasing nodes, reducing node values, disturbance node values and the like. The method provides necessary technical conditions for development based on wavelet domain geophysical inversion, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of wavelet transform image processing, in particular to a wavelet transform model parameter perturbation method. Background technique [0002] Geophysics is the use of the principles and methods of mechanics, electricity, magnetism, and heat in physics to find out the relationship between them in terms of time and space by observing and studying the physical conditions, physical properties, and physical states of various parts of the earth's interior. In order to understand the earth and achieve the goals of geological exploration and prospecting. Geophysical models have a wide range of applications, mainly including oil and gas exploration, groundwater detection, mineral exploration, environmental monitoring, geothermal exploration, and deep structural research. [0003] Wavelet transform is developed on the basis of Fourier analysis, and it is a rapidly developing field. Compared with Fourier transform, w...

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Application Information

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IPC IPC(8): G06T17/00G06T17/05G06F17/14
CPCG06F17/148G06T17/005G06T17/05
Inventor 郭荣文刘黎明田圣琦柳建新
Owner CENT SOUTH UNIV
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