合成孔径雷达图像的“动态”陆地掩蔽算法

W. Biamino, M. Borasi, M. Cavagnero, A. Croce, L. D. Matteo, F. Fontebasso, F. Tataranni, P. Trivero
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引用次数: 8

摘要

设计并实现了一种新的合成孔径雷达(SAR)图像陆地掩蔽方法。所开发的算法以公共领域数据库中的存档海岸线作为输入,并通过分析后向散射值对其进行修改,从而在SAR图像上绘制实际海岸线。从GSHHS(全球自一致分层高分辨率海岸线数据库)的数据开始,通过评估SAR图像中沿海地区的辐射强度梯度来改进海岸线定位。采用Canny边缘检测算法,得到了进一步的增强效果。该方法在Envisat和ERS图像以及ALOS和COSMO SkyMed图像上进行了测试。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A “dynamic” land masking algorithm for synthetic aperture radar images
A novel approach to land masking in synthetic aperture radar (SAR) images is designed and implemented. The developed algorithm takes as input an archived shoreline from a public domain database and modifies it to draw the actual shoreline on SAR images by analysing backscatter values. Starting with data from the GSHHS (the global self-consistent hierarchical high-resolution shoreline database), coastline positioning is improved by evaluating the radiometric intensity gradient in coastal areas of the SAR image. A further enhancement is obtained by applying the Canny edge detection algorithm. The methodology is tested on Envisat and ERS images, as well as on ALOS and COSMO SkyMed images.
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