Transmission Line Extraction Method Based on Fully Polarized Circular SAR Data
An extraction method and transmission line technology, which is applied in the field of transmission line extraction based on fully polarized circular track SAR data, can solve the problems of power line extraction depending on extraction, inability to effectively extract electric towers, failure of transmission line extraction, etc., and achieve optimal extraction Results, the effect of improving the extraction accuracy
Active Publication Date: 2020-02-21
INST OF ELECTRONICS CHINESE ACAD OF SCI
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The obvious defect of this method is that the extraction of the transmission line depends on the extraction of the electric tower. If the electric tower connected to the transmission line is not obvious and the electric tower is blocked or other reasons that make it impossible to effectively extract the electric tower will lead to the failure of the extraction of the transmission line.
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[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0049] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values within acceptable error margins or design constraints. The directional terms mentioned in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring to the directio...
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The invention provides a power transmission line extraction method based on complete polarization circular track SAR data, and the method comprises the steps: S1, obtaining a full-aperture coherent accumulation complex number image of an irradiation scene; S2, extracting an changing echo curve of a pixel point with the azimuth; S3, calculating an energy concentration ratio parameter; S4, carrying out the threshold judgment of the energy concentration ratio parameter of the pixel point, and extracting anisotropic target pixels; S5, obtaining an alpha parameter of each pixel point through employing the complete polarization data of the irradiation scene and an H / alpha polarization decomposition method; S6, carrying out the threshold filtering of the alpha parameter at step S5 based on the anisotropic target pixels extracted at step S4, and obtaining power transmission region pixels. The method makes the most of the anisotropic orientation scattering features of a power transmission line, and achieves the effective and automatic extraction of the power transmission line.
Description
technical field [0001] The invention relates to the technical field of radar signal processing, in particular to a power line extraction method based on fully polarized circular track SAR data. Background technique [0002] Synthetic Aperture Radar (SAR) is an active microwave remote sensing method. Compared with optical remote sensing, it has stronger signal penetration and has all-weather and all-weather earth observation capabilities. One of the important means. As an important form of intermediate energy, electric energy is related to all aspects of the national economy and people's livelihood. Transmission lines are an important part of smart grid transmission facilities that transmit electric energy. Therefore, the extraction of transmission lines based on SAR is of great significance for the maintenance of transmission systems and national defense detection. . [0003] At present, the millimeter-wave radar can use the Bragg scattering characteristics of the metal wi...
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IPC IPC(8): G01S13/90G01S7/02
CPCG01S7/026G01S13/904G01S13/9088G01S13/9076
Inventor 洪文赵月林赟陈诗强申文杰薛斐腾鲍慊
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI