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Sea surface spilled oil detection method based on C-band polarimetric SAR image

A sea surface oil spill and detection method technology, applied in the radio wave measurement system, radio wave reflection/re-radiation, image enhancement, etc., can solve the problems of inability to obtain detection accuracy, etc.

Inactive Publication Date: 2017-01-04
WUHAN UNIV
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Problems solved by technology

Therefore, the performance of marine oil spills on SAR satellite images is determined by a variety of factors. Simply relying on microwave remote sensing methods often cannot obtain better detection accuracy. Combining local sea area wind speed, sea waves, and even optical sensors can improve oil spill detection. precision

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  • Sea surface spilled oil detection method based on C-band polarimetric SAR image
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  • Sea surface spilled oil detection method based on C-band polarimetric SAR image

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Embodiment Construction

[0041] The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0042] The technical scheme of the present invention can adopt computer technology to realize automatic operation, such as figure 1 As shown, the process of the embodiment of the present invention includes the following steps:

[0043] Step 1: Selection and preprocessing of POLSAR images.

[0044] Before oil spill detection, the present invention needs to analyze the header file of the original POLSAR data, select the SAR image with an incident angle between 23-55 degrees, and then perform multi-view denoising on it, and do 5* upwards in azimuth and distance 5 multi-look to reduce coherent speckle noise.

[0045] Step 2: Construct a high-dimensional polarization feature set.

[0046] Polarization decomposition is performed on the fully polarimetric SAR images, because the polarization parameters have a good auxiliary effect on the extr...

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Abstract

The invention discloses a sea surface spilled oil detection method based on a C-band polarized SAR image, and belongs to the technical field of polarimetric radar remote-sensing image processing. Aiming at problems that a conventional method is not clear in relation between spilled oil heat dissipation features and recognition precision and is lower in recognition precision, the method introduces the local wind speed, sea waves and polarization information of a to-be-detected region, combines the polarization and oceanophysics features of an oil spilling region and a suspected oil spilling region, builds a spilled oil detection rule on the basis of supervision information, carries out the comprehensive judgment of the to-be-detected region according to the building result of the rule, improves the spilled oil detection precision, and is of great significance to the protection of a marine environment and ecological resources.

Description

technical field [0001] The invention belongs to the technical field of polarimetric radar remote sensing image processing, and relates to a new method for detecting sea surface oil spills based on C-band polarimetric Synthetic Aperture Radar (POLSAR) images. Background technique [0002] my country has a long coastline base, a large territorial sea, rapid economic development, and busy ocean transportation. However, there are frequent sudden oil spill accidents such as the rupture of ocean oil pipelines, oil tanker leakage, collisions, and illegal sewage discharges. It has caused great damage to the coastal ecological environment, marine resources and marine economy, and seriously affected the implementation of my country's sustainable marine development strategy. Statistics show that from 1973 to 2010, there were more than 3,000 incidents of ship oil spills in China's coastal areas, with an average of one accident every four days, and the total amount of ship oil spills reac...

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Application Information

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IPC IPC(8): G01S13/90G06T7/00G06K9/00G06K9/62
CPCG06T7/0004G01S13/90G01S13/904G06T2207/10044G06V20/13G06F18/24147G01S13/9076
Inventor 杨雨鑫杨杰孙倩史磊
Owner WUHAN UNIV
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