Building falling loss rate estimation method based on rotating domain polarization coherence characteristic

A technology of building and loss rate, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measuring devices, etc., can solve the problem of rough loss degree, achieve good robustness, convenient implementation, and simple implementation Effect

Active Publication Date: 2017-02-22
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

At present, the building damage estimation method of full-polarization SAR can only give a rough classification of the damage degree, such as severe damage, moderate damage, light damage and no damage, etc.

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  • Building falling loss rate estimation method based on rotating domain polarization coherence characteristic
  • Building falling loss rate estimation method based on rotating domain polarization coherence characteristic
  • Building falling loss rate estimation method based on rotating domain polarization coherence characteristic

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Embodiment Construction

[0046] In order to better understand the technical solutions of the present invention, the implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0047] figure 1 It is an implementation flow chart of the present invention, which mainly consists of five steps: the first step, the polarization scattering matrix is ​​rotated around the full polarization radar line of sight; the second step is to calculate the polarization coherent characteristic sequence in the rotation domain; wherein, the set The selection of similarity sample pixels in the average processing is processed by the SimiTest algorithm based on similarity detection. For the specific algorithm content, please refer to the literature Si-Wei Chen, Xue-Song Wang and Motoyuki Sato, "PolInSAR complex coherence estimation based on covariance matrix similarity test," IEEE Transactions on Geoscience and Remote Sensing, vol.50, no.11, pp.4699–4710, Nov....

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Abstract

The invention belongs to the field of full-polarized SAR (Synthetic Aperture Radar) imaging remote sensing technology, and relates to a full-polarized SAR building falling loss rate estimation method based on rotating domain polarization coherence characteristic. The method comprises the following steps: 1, rotating a polarization scattering matrix around a full-polarized radar line of sight; 2, calculating a polarization coherence characteristic sequence in a rotating domain; 3, calculating a polarization coherence fluctuant degree; 4, calculating a building polarization falling loss factor; and 5, estimating a building falling loss rate. The method is simple in implementation, has good robustness on different building goals, is also very convenient to implement, and can be directly used for processing multi-time-phase full-polarized SAR images acquired by various full-polarized SAR systems. The method has an important reference value in the application fields of SAR building falling loss estimation, disaster reduction and prevention and the like.

Description

technical field [0001] The invention belongs to the technical field of full-polarization SAR (Synthetic Aperture Radar, Synthetic Aperture Radar) imaging remote sensing, and relates to a method for estimating the loss rate of buildings in full-polarization SAR based on polarization coherence features in a rotation domain. Background technique [0002] In recent years, natural disasters such as earthquakes with greater destructive power have occurred frequently, seriously threatening people's lives and property safety. According to statistics (Debarati Guha-Sapir, Philippe Hoyois, Regina Below, "Annual disaster statistical review 2013: The numbers and trends," CRED, Brussels, Belgium, Technical Report, 2014), since 2000, there have been more than 7 earthquakes worldwide every year. 240 times. Among them, the Wenchuan Earthquake in 2008 caused a loss of about US$91.9 billion, and the Great East Japan Earthquake and Tsunami in 2011 caused a loss of about US$217.5 billion. The...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90
CPCG01S13/904G01S13/9076
Inventor 陈思伟李永祯王雪松陶臣嵩代大海
Owner NAT UNIV OF DEFENSE TECH
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