Magnetic pole inversion diagram information extraction method based on improved LSD
A technology of information extraction and magnetic poles, which is applied in the field of image processing, can solve the problems of low information efficiency in magnetic pole reversal graphs, and achieve the effects of reducing detection, improving algorithm speed, and improving accuracy
Pending Publication Date: 2022-08-05
NANJING UNIV OF INFORMATION SCI & TECH
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[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a method for extracting magnetic pole reversal diagram information based on improved LSD, and to overcome the low efficiency of manual extraction of magnetic pole reversal diagram information
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Embodiment 1
[0059] This embodiment introduces a method for extracting magnetic pole reversal map information based on improved LSD, including:
[0060] Obtain a set of pictures that are pre-cut and saved from the magnetic pole reversal diagram in the electronic document;
[0061] Manually annotating the depth information of the picture set to obtain the labeled picture set;
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The invention discloses a magnetic pole inversion diagram information extraction method based on an improved LSD. The method comprises the steps that a picture set is acquired; manually marking depth information of the picture set; carrying out edge detection on the marked picture set through a sobel operator; performing line segment detection on the edge image through an improved LSD algorithm; screening the line segments to obtain a boundary line segment set; combining every two boundary line segment sets into a magnetic pole inversion area according to depth sorting, and obtaining a magnetic pole inversion area set; traversing each pixel in the magnetic pole inversion area to obtain the magnetism of the magnetic pole inversion area; calculating the depth information of each magnetic pole inversion area by using the depth information and the boundary line segment coordinates of each magnetic pole inversion area; according to the magnetism of the magnetic pole inversion area and the depth information of each magnetic pole inversion area, depth-magnetism data of the magnetic pole inversion graph are integrated, and the detection accuracy of the edge line segment of the magnetic pole inversion area is improved.
Description
technical field [0001] The invention relates to an improved LSD-based magnetic pole reversal map information extraction method, which belongs to the technical field of image processing. Background technique [0002] An important prerequisite for a deep understanding of geological history is the establishment of a high-precision chronological framework. Magnetic stratigraphy is one of the important branches of paleomagnetism. It is based on the analysis of the variation characteristics of residual magnetization in rocks or sediments to judge the polarity reversal of the geomagnetic field in stratigraphic records and to define the relative age of the strata. of a discipline. The direction of the geomagnetic field changes over time. Among them, the most extreme situation is that the north and south poles of the geomagnetic field are reversed, that is, the polarity is reversed. Geomagnetic polarity reversal is one of the most striking features of the geomagnetic field, leavin...
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Login to View More IPC IPC(8): G06T7/13G06T7/90G06T5/00
CPCG06T7/13G06T7/90G06T5/70Y02A90/30
Inventor 郭浩然江结林胡祥奔许小龙
Owner NANJING UNIV OF INFORMATION SCI & TECH