An Active Contour Level Set Oil Spill Extraction Method Using SAR Multidimensional Polarization Feature
An active contour and polarization feature technology, applied in the field of image processing, can solve the problem of inability to segment images with multi-dimensional SAR oil spill polarization features
Active Publication Date: 2020-07-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0007] In view of the above problems, the purpose of the present invention is to improve the accuracy of oil spill information extraction from SAR images, and to provide an active contour level set oil spill extraction method that can apply SAR multi-dimensional polarization features, so as to solve the problem that the level set active contour model cannot be used for multidimensional SAR Image Segmentation of Oil Spill Polarization Features
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[0044] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments:
[0045] refer to figure 1 , the specific implementation process of the present invention is as follows:
[0046] (1) Refer to the attached figure 2 , to construct the space vector a of SAR multi-dimensional oil spill polarization characteristics;
[0047] After SAR data filtering and preprocessing, polarization decomposition processes j polarization feature images such as entropy, μ, degree of polarization (Dop) and span, etc. The polarization feature images are all one-dimensional images, and the j polarization feature images are composed of A multi-dimensional image, the same geographic spatial location points on the multi-dimensional image form a space vector a;
[0048] (2) Calculate the principal component value of the ...
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SAR oil spill information extraction based on the level set active contour model can only use single-dimensional SAR images, and cannot segment multi-dimensional SAR oil spill polarization images. Therefore, an active contour level set spillover method that can apply SAR multi-dimensional polarization features is proposed. Oil extraction method. This method designs the SAR multi-dimensional polarization feature space vector, calculates the principal component values of the inner and outer vectors of the contour, proposes a multi-dimensional energy function, and finally constructs a multi-dimensional active contour model function, and uses the evolution equation of the multi-dimensional active contour model function to perform evolution operations on multi-dimensional SAR images. Make full use of multi-dimensional SAR oil spill polarization features to guide the contour evolution to the real water-oil boundary, and extract oil spill information from SAR images.
Description
technical field [0001] The invention belongs to the field of image processing, and belongs to the application of multi-dimensional SAR image target extraction, in particular to an active contour level set oil spill extraction method that can apply SAR multi-dimensional polarization features. Background technique [0002] Marine oil spill accidents have caused various types of environmental damage and occurred frequently to varying degrees. Marine ecosystems, environmental fisheries, wild animals, and other social interests are potentially threatened. Countries around the world have strengthened monitoring and research on marine oil spills . Synthetic Aperture Radar (SAR) technology has been proven to be an effective means of marine oil spill monitoring due to its all-day and all-weather characteristics. [0003] Previous studies have proved through experiments that different SAR features can assist oil spill detection and classification, such as polarization features such a...
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IPC IPC(8): G06K9/46
CPCG06V10/44G06V10/462
Inventor 盛辉王婉笛陈艳拢刘善伟
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)