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SAR image-based power transmission corridor tree height extraction method

An extraction method and corridor technology, which is applied in the field of tree height extraction of power transmission corridors based on spaceborne SAR images, can solve the problems of small airborne remote sensing inspection range, slow re-inspection cycle, and low detection efficiency, so as to eliminate the threat of tree barriers , Reduce consumption, reduce the effect of transmission line times

Inactive Publication Date: 2019-09-17
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, a SAR image-based transmission line tree height extraction method provided by the present invention solves the problems of low tree height detection efficiency, slow re-tour cycle and small airborne remote sensing inspection range in traditional manual inspection. question

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  • SAR image-based power transmission corridor tree height extraction method
  • SAR image-based power transmission corridor tree height extraction method
  • SAR image-based power transmission corridor tree height extraction method

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Embodiment

[0056] Such as figure 1 As shown, the present invention provides a method for extracting the tree height of transmission corridors based on SAR images, and its implementation method is as follows:

[0057] S1. Using synthetic aperture radar satellites to obtain two SAR images of the transmission corridor study area, and preprocessing the main and auxiliary image data in the two SAR images respectively, to obtain the coherence coefficient map of the trees in the study area, and its implementation method as follows:

[0058] S101. Draw a transmission line map on Google Earth according to the coordinates of the transmission line tower, and determine the research area of ​​the transmission corridor;

[0059] S102. Using the synthetic aperture radar satellite to obtain two SAR images of the same orbital mode in the transmission corridor research area, select one of them as the main image and the other as the auxiliary image;

[0060] S103. Use ENVI software to perform baseline es...

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Abstract

The invention discloses an SAR image-based power transmission corridor tree height extraction method. The SAR image-based power transmission corridor tree height extraction method comprises the steps of obtaining a correlation coefficient map of a research region by data pre-processing on two SAR images of a power transmission corridor research region; performing mask processing on the images, and extracting a mask image only containing a power transmission corridor tree; extracting tree height around the power transmission corridor to obtain a tree height map by terrain factor improvement-based three-stage algorithm according to the mask image combined with the correlation coefficient map; extracting a tree height of a surrounding sample of the power transmission corridor; and comparing a tree height measured in a site, and verifying height extraction accuracy. Aiming at the problems of low manual inspection efficiency, low detection data accuracy, small onboard remote sensing monitoring range and the like of traditional power transmission corridor tree height extraction, the tree height around the power transmission corridor is detected by a high-resolution satellite-borne SAR image, the detection range can be effectively expanded, and the SAR image-based power transmission corridor tree height extraction method is free from influence of weather and is of important significance to tree obstacle early warning of a power transmission line.

Description

technical field [0001] The invention belongs to the technical field of early warning of tree barriers in power transmission corridors, and in particular relates to a method for extracting tree heights in power transmission corridors based on space-borne SAR images. Background technique [0002] In recent years, with the continuous acceleration of my country's electric power development, the power grid has developed rapidly, the operating voltage level of the power grid system has continued to increase, and the network scale has also continued to expand, basically forming a complete long-distance power transmission grid. my country has a vast territory, the transmission grid covers all parts of the country, and overhead transmission lines cross mountains, forests, deserts, plains and other areas, which brings great challenges to the inspection of transmission lines. Traditional manual inspection mainly relies on ground transportation or walking to obtain information on transm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01B15/00
CPCG01B15/00G01S13/90G01S13/9027G01S13/9076
Inventor 曹永兴薛志航吴驰刘凤莲朱军卜祥航李宇
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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