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Sea surface oil spilling detection method of complete polarization synthetic aperture radar

A technology of synthetic aperture radar and sea oil spill, applied in measuring devices, radio wave measurement systems, radio wave reflection/re-radiation, etc., can solve high false alarm rate, sacrifice detection speed, high false alarm rate has not been completely solved Solve the problems and achieve the effect of improving the detection speed

Inactive Publication Date: 2013-04-03
SUZHOU UNIV OF SCI & TECH
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Problems solved by technology

Since oil spills and suspected objects appear as shadowy features on SAR images, this method has a high false alarm rate.
When the detector is improved, such as replacing the minimum distance detector with an artificial neural network detector, although the high false alarm rate is suppressed, it is also at the expense of detection speed.
In conclusion, the problem of high false alarm rate in SAR sea oil spill detection has not been completely resolved

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  • Sea surface oil spilling detection method of complete polarization synthetic aperture radar
  • Sea surface oil spilling detection method of complete polarization synthetic aperture radar
  • Sea surface oil spilling detection method of complete polarization synthetic aperture radar

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Embodiment Construction

[0019] The present invention will now be described in detail with reference to the drawings.

[0020] The method for detecting oil spill on the sea surface with a fully polarized synthetic aperture radar of the present invention includes the following steps:

[0021] 1. Read in the fully polarized SAR image and record it as with Among them, HH is horizontally polarized transmission and horizontally polarized reception, VV is vertically polarized transmission and vertically polarized reception, and HV is horizontally polarized transmission and vertically polarized reception. Use adaptive threshold algorithm to segment the fully polarized SAR image to obtain the fully polarized SAR image S after removing the sea surface VV , S HH And S HV , Threshold T=μ+kσ, where μ is the mean value of the fully polarized SAR image, σ is the standard deviation of the fully polarized SAR image, and k is a coefficient related to sea conditions.

[0022] 2. According to the prior information, from th...

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Abstract

The invention discloses a sea surface oil spilling detection method of a complete polarization synthetic aperture radar (SAR). The method comprises the following steps of: carrying out adaptive threshold value segmentation on a complete polarization SAR image to obtain complete polarization SAR images getting rid of the sea surface; selecting a training sample and a testing sample from the complete polarization SAR images getting rid of the sea surface; training an SVM (Support Vector Machine) detector, and normalizing polarization characteristic vectors of the detector, which comprise a scattering entropy H, a scattering angle alpha, a negative entropy A, a co-polarization ratio gamma, a cross polarization ratio eta, a depolarization ratio delta, a co-polarization phase difference phi HH-VV and a cross polarization phase difference phi HH-VV; and finally, detecting and identifying spilled oil and suspected objects by using the SVM and outputting a detection result. The method has thecharacteristics of high detection speed and low false alarm rate and is suitable for the sea surface oil spilling detection of the SAR.

Description

Technical field [0001] The invention belongs to the technical field of ocean remote sensing, and specifically relates to a method for detecting oil spills on the sea surface of a fully polarized synthetic aperture radar. Background technique [0002] Sea surface oil spill monitoring mainly includes direct detection and remote sensing detection. Synthetic aperture radar (SAR, synthetic aperture radar) belongs to the remote sensing detection method. Compared with direct detection methods, SAR has the following unique advantages in sea surface oil spill monitoring: 1. SAR can work at night, so it can detect illegal / intentional / malicious discharge of oil pollution; 2. In any climatic conditions SAR can track the dynamic changes of oil pollution in a large area, so as to formulate a scientific and reasonable plan for cleaning up oil pollution; 3. Using SAR images, the source of oil pollution can be found, that is, the subject of the accident can be determined, which can provide a basi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/41
Inventor 杨永生张宗杰赵梅
Owner SUZHOU UNIV OF SCI & TECH
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