Freezing and Thawing Detection Method of Polar Ice Sheet
A detection method and freeze-thaw technology, applied in the field of radar detection, can solve the problems of poor portability and flexibility of change detection algorithms and low classification accuracy, and achieve the effect of high resolution and improved accuracy
Active Publication Date: 2021-01-01
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology
The glacier zone classification method using auxiliary information such as altitude can only be applied to local areas, and the classification accuracy is not high, and the change detection algorithm is not portable and flexible
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[0023] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. It should be understood that the specific The examples are only used to explain the present invention, not to limit the present invention. The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0024] figure 1 It is a flow chart of Embodiment 1 of the polar ice cap freeze-thaw detection method. Such as figure 1 As shown, the polar ice cap freeze-thaw detection method includes the following steps: radar image acquisition step S...
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The invention discloses a polar ice cover freeze-thaw detection method, comprising the following steps: a radar image acquisition step, obtaining a polarization image through a space-borne polarization synthetic aperture radar; The radar polarization image is subjected to noise reduction processing to suppress speckle noise; the polarization decomposition step is to perform incoherent polarization decomposition on the polarization image to obtain various decomposition parameters; the sampling analysis step is to select glacier belts with typical characteristics on the polarization image Carry out sample analysis; classification step, establish and revise classifier, classify the glacier zone, obtain the distribution result of glacier zone; Cover freeze-thaw detection results. The invention overcomes the shortcomings of previous spaceborne synthetic aperture radar ice cover freeze-thaw detection methods relying too much on auxiliary information and regional limitations, and improves the classification accuracy.
Description
technical field [0001] The invention relates to the technical field of radar detection, in particular to a method for realizing high-precision freezing and thawing detection of polar ice caps by using spaceborne polarization synthetic aperture radar. Background technique [0002] As the Antarctic continent has most of the glaciers and freshwater resources in the world, changes in the distribution of ice sheets and glaciers have an important impact and research value on global climate change and freshwater resource distribution. Among them, the freezing and thawing of the Antarctic ice sheet plays an important role in controlling the heat exchange between the earth's surface and the atmosphere and the absorption of solar radiation on the surface, and is of great significance in reflecting and controlling the state of global climate change. The traditional radar signal processing technology uses synthetic aperture (SAR) technology for azimuth clutter suppression, and beamformi...
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IPC IPC(8): G06K9/00G06K9/62
CPCG06F2218/12G06F18/241
Inventor 李新武王蒙梁雷
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI