Kirsch Direction Template Despeckling Algorithm of High-Resolution SAR Images-Based on Structural Information Detection
Kirsch Direction Template Despeckling Algorithm of High-Resolution SAR Images-Based on Structural Information Detection
复制标题
基于结构信息检测的高分辨率SAR图像Kirsch方向模板去斑算法
DOI:
10.1109/lgrs.2020.2966369
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发表时间:
2021-01
影响因子:
4.8
通讯作者:
Yunjing Song
中科院分区:
文献类型:
--
作者:
Sujuan Hou;Zengguo Sun;Liu Yang;Yunjing Song
In order to overcome the drawback of the traditional Kirsch template despeckling usings fixed windows, an improved Kirsch direction template despeckling algorithm, based on structural information detection, is proposed for high-resolution synthetic aperture radar (SAR) images. First, the point targets are detected and preserved in the current region. Second, the window is enlarged adaptively based on the statistical characteristics of the local region. Finally, the window finally obtained is classified. The averaged filter is directly adopted if the region is homogeneous, or else the Kirsch template filter is used. Combining point target detection, adaptive windowing, and region classification, altogether the proposed algorithm can effectively improve the performance of the traditional Kirsch direction template despeckling. Despeckling experiments on simulated and real high-resolution SAR images demonstrate that the Kirsch direction template despeckling algorithm based on structural information detection can not only sufficiently suppress speckle in homogenous and edge regions, but also effectively preserve point targets and edge information, leading to good despeckling results.
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