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Complex geological curved surface feature extraction and reconstruction method

A feature extraction and complex geological technology, applied in image data processing, instrumentation, 3D modeling, etc., can solve problems such as low efficiency, large amount of calculation, and prone to fragmentation of feature points or feature lines, so as to improve extraction efficiency, The effect of reducing the amount of calculation

Active Publication Date: 2017-02-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0030] The purpose of the present invention is to solve the problem that the terrain feature extraction algorithm based on triangulation network DEM in the prior art has a large amount of calculation and low efficiency, the extraction of feature points or feature lines is prone to fragmentation, and the terrain reconstruction method has non-smoothness , a complex geological surface feature extraction and reconstruction method is proposed

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  • Complex geological curved surface feature extraction and reconstruction method
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  • Complex geological curved surface feature extraction and reconstruction method

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Embodiment Construction

[0092] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0093] The main data structure used in the embodiment of the present invention is as shown in table 1:

[0094] Table 1

[0095]

[0096] In Table 1, the point ID of the point data structure is a string type, which is self-increasing by 1; the triangle ID in the regular linked list structure of the triangular network is an integer, and is self-increasing by 1, and the three-point ID of the triangle is the ID of the corresponding point structure ;The edge ID in the edge structure of the triangulation network is a string type, which is spliced ​​by the point IDs corresponding to the two ends of the edge. Among them, the point ID with a larger elevation value is in front, and the point ID with a smaller elevation value is behind. The ID of the end point is the ID of the corresponding point structure, the attribute value of the adjacent triangle on the l...

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Abstract

The invention discloses a complex geological curved surface feature extraction and reconstruction method. By reference to related knowledge in the aspect of river network tracking in hydrological analysis and introduction of surface tracking, the problem in fragmentization during feature line extraction is solved; and by applying a hash table, the calculation amount of a geological feature extraction part is greatly reduced and the extraction efficiency is greatly improved. In addition, for the deficiencies that the calculation amount is large, terrain skeleton points cannot be determined and are reserved, and the like in an existing terrain reconstruction method, a fourth-order partial differential equation-based geological curved surface smooth reconstruction thought is adopted, and feature point constraints are introduced for reserving terrain features of an original curved surface in a smoothing process, so that relatively good balance is achieved between curved surface smoothing and curved surface feature reservation.

Description

technical field [0001] The invention belongs to the technical field of terrain feature extraction and reconstruction, and in particular relates to the design of a complex geological surface feature extraction and reconstruction method. Background technique [0002] The concept of Digital Elevation Model (DEM, Digital Elevation Model) was proposed by Professor Miller of the Massachusetts Institute of Technology in 1958. The real terrain is analyzed and digitized. Based on the powerful processing capabilities of current computers, compared with traditional paper terrain models (such as maps) and images, digital terrain based on digital elevation models has at least the following advantages: [0003] (1) Facilitate the storage and management of terrain data; [0004] (2) It is convenient to analyze and calculate the terrain; [0005] (3) It can be scaled without loss, which is convenient for analyzing terrain details; [0006] (4) It is convenient to design algorithms to in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06T17/30
CPCG06T17/30G06T2215/06G06V10/44
Inventor 姚兴苗王运璇胡光岷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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