Center shaft model generation method and device
A shaft model and topological feature technology, applied in the field of central shaft model generation methods and devices, can solve problems such as poor noise resistance of the central shaft model, achieve the effects of enhancing stability and efficiency, and alleviating the phenomenon of boundary noise
Active Publication Date: 2018-06-08
CHINA UNIV OF PETROLEUM (BEIJING)
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[0004] The purpose of the embodiments of this application is to provide a method and device for generating a central axis model to solve the technical problem of poor noise resistance of the central axis model generated by the existing distance transformation algorithm
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[0040] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The implementations are only some of the implementations of the present application, not all of them. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this application.
[0041] The traditional distance transformation method only searches within the adjacent points when extracting topological feature points, and it is easy to form boundary noise at the small sudden change of the boundary, and the weight value is unreasonable when connecting the central axis. Considering the...
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The invention discloses a center shaft model generation method and device. The method comprises the following steps of: generating a three-dimensional distance matrix according to a real topological structure of a porous medium; determining topological feature points according to the three-dimensional distance matrix; connecting the topological feature points to obtain a center shaft model. According to the method and device, an algorithm of generating center shaft models through distance transformation is improved, and an enlarged adjacent point search range is defined during the extraction of the topological feature points, so that a boundary noise phenomenon is relieved, and a path deviation problem is solved through correcting the distance matrix. Compared with the prior art, the method and device have the advantages that the problem that existing distance transformation-based center shaft model generation method is bad in noise resistance, has boundary noises and is easy to causepath deviation, and both the stability and efficiency of the improved distance transformation-based center shaft model generation scheme are strengthened.
Description
technical field [0001] The present application relates to the technical field of digital rock core processing, in particular to a method and device for generating a central axis model. Background technique [0002] For a long time, the seepage mechanism of fluid in porous media has been mostly studied qualitatively through experiments. The seepage theory obtained from the research stays on the macro scale, so many micro factors have not been considered. Therefore, it is of great significance to conduct digital core research on porous medium fluid at the pore level and establish a theoretical system that can accurately describe the microscopic seepage mechanism. [0003] Three-dimensional model analysis technology has an important application in the analysis of core pore structure and its corresponding statistical characteristics, and the axial skeleton is an important parameter in the analysis of three-dimensional model of pores. The establishment methods of the central axi...
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IPC IPC(8): G06T17/00G06T5/00G06K9/46
CPCG06T17/00G06V10/44G06T5/70
Inventor 第五鹏祥吕道平游振江寇根杨龙王子强周建章震刘同敬
Owner CHINA UNIV OF PETROLEUM (BEIJING)