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Pi/4 compact polarized synthetic aperture radar building area extraction method

A technology of area extraction and reduced polarization, applied in the reflection/re-radiation of radio waves, instruments, measuring devices, etc., to achieve the effect of improving the relatively scarce

Pending Publication Date: 2022-06-07
中国自然资源航空物探遥感中心
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The validity of the method is still an open question due to the limited number of available methods and application limitations

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  • Pi/4 compact polarized synthetic aperture radar building area extraction method
  • Pi/4 compact polarized synthetic aperture radar building area extraction method
  • Pi/4 compact polarized synthetic aperture radar building area extraction method

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Embodiment Construction

[0045] In order to understand the features and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0046] like figure 1 As shown, the π / 4 reduced polarization SAR building area extraction method according to the embodiment of the present invention includes the following steps:

[0047] S1: π / 4 reduced polarization SAR image data preprocessing;

[0048] S2: Obtain the preprocessed π / 4 reduced polarization SAR image, and calculate the reduced polarization characteristics;

[0049] S3: Using the reduced polarization feature, the water body extractor, the orthogonal building area extractor with the building area parallel / perpendicular to the radar line-of-sight, and the sloping building area with a large inclination angle between the building area and the radar line-of-sight are calculated. device;

[0050] S4...

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Abstract

The invention discloses a pi / 4 compact polarization synthetic aperture radar building area extraction method, which reasonably extracts a building area by using compact polarization characteristics, and provides a new thought for the pi / 4 compact polarization synthetic aperture radar building extraction method. The method comprises the following steps of: preprocessing pi / 4 compact polarimetric SAR image data; obtaining a preprocessed pi / 4 compact polarimetric SAR image, and calculating to obtain compact polarimetric features; calculating to obtain a water body extractor, an orthogonal building area extractor of which the building area is parallel to / perpendicular to the radar sight line direction and an inclined building area extractor of which the building area and the radar sight line direction have a large inclination angle by utilizing the compact polarization characteristics; a typical area is selected for statistical analysis to obtain thresholds of a water body extractor, an orthogonal building extractor and an inclined building area extractor, and the thresholds are used for extracting a building area to obtain a building area extraction result.

Description

technical field [0001] The invention relates to the field of reduced polarization synthetic aperture radar remote sensing, in particular to a π / 4 reduced polarization synthetic aperture radar (SAR) building area extraction method. Background technique [0002] With the rapid development of synthetic aperture radar (Synthetic Aperture Radar, SAR) measurement technology, the research direction is evolving towards multi-polarization, multi-frequency, and multi-angle directions. Among them, polarimetric SAR, as an important branch of SAR measurement technology, is used in the classification of ground objects. , target recognition and disaster detection, etc., play an important role. As an emerging technology of polarimetric SAR, condensed polarimetric SAR has a large width. At present, there are few application methods based on condensed polarimetric SAR, and it has great application potential in various application fields. [0003] As one of the important types of ground objec...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/9004G01S13/9021
Inventor 王宇葛大庆刘斌万祥星吴琼张玲李曼于峻川王艳
Owner 中国自然资源航空物探遥感中心
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