Method for detecting oil spill at sea based on full-polarized synthetic aperture radar image

A technology for aperture radar and oil spills on the sea surface, which can be used in measurement devices, radio wave measurement systems, reflection/re-radiation of radio waves, etc., and can solve the problems of indistinguishable likelihoods, complex algorithms, and long processing time.

Active Publication Date: 2016-08-17
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0007] At present, it is difficult to distinguish the likelihood of the presence of sea surface oil spills by using synthetic aperture radar (SAR) satellite images, and the technical problems such as complex algorithms require long processing time, etc. Oil detection method to improve the performance of sea oil spill detection and classification methods, and facilitate the application of full polarization SAR in practical engineering problems such as sea oil spill monitoring

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  • Method for detecting oil spill at sea based on full-polarized synthetic aperture radar image
  • Method for detecting oil spill at sea based on full-polarized synthetic aperture radar image
  • Method for detecting oil spill at sea based on full-polarized synthetic aperture radar image

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Embodiment Construction

[0056] The present invention proposes a method for rapidly processing remote sensing images using synthetic aperture radar to monitor sea surface oil spills. Taking the SIR-C image acquired in NASA space shuttle radar experiments as an example, the effectiveness of the method is verified in combination with actual data.

[0057] The specific processing steps are as follows:

[0058] 1. Data acquisition and preprocessing

[0059] Obtain the polarimetric SAR data that needs to be processed from the fully polarimetric SAR image, perform preprocessing such as format conversion and calibration on the polarimetric SAR data that need to be processed (if necessary), and obtain the fully polarimetric SAR covariance matrix (C ). If the complex polarization scattering matrix (S) is obtained, it is transformed into a covariance matrix by the following method:

[0060] S = S h ...

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Abstract

The invention discloses a method for detecting oil spill at sea based on a full-polarized synthetic aperture radar (SAR) image. The method includes the following steps: pre-treating polarized SAR data which require analyzing to obtain a full-polarized SAR covariance matrix; conducting refining polarized Lee filtering on the covariance matrix; based on the filtered covariance matrix or through a Stokes vector calculated by the covariance matrix, extracting 6 polarized features to constitute a feature combination; inputting training sample features with ground verification label information to a maximum likelihood (ML) classifier, training the classifier and optimizing parameters of the classifier; taking polarized features as input, utilizing the ML classifier to conduct detection and classification on an oil membrane; processing a classification result based on morphology, utilizing verification information of actual measurement to evaluate classification precision. According to the invention, the method can increase performances of oil spill at sea detection and classification methods and promote the application of the full-polarized SAR in actual engineering problems such as monitoring of oil spill at sea.

Description

technical field [0001] The invention belongs to the technical field of marine remote sensing, in particular to a radar satellite remote sensing method for monitoring sea surface oil spills. Background technique [0002] Marine oil spill is one of the most common marine pollutions, which damages the marine environment and ecosystem and threatens the growth of marine life. Oil spill accidents will cause huge economic losses to the fishery and mariculture industry, and even endanger human health through the transmission of the food chain. Timely and accurate sea oil spill monitoring and early warning can enable the accident to be dealt with early before the impact expands, effectively reducing the negative impact of the accident. Effective oil spill monitoring methods can provide a basis for investigating the responsibilities of ships and enterprises involved in accidents, thereby providing support for maintaining the healthy and sustainable development of coastal zones and ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G06K9/62
CPCG01S13/90G06F18/214G01S13/9076
Inventor 张渊智李煜何宜军
Owner NANJING UNIV OF INFORMATION SCI & TECH
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