| SAR图像的自适应边缘保持去噪滤波 |
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| 引用本文： | 薛存金,温晓阳,董庆. SAR图像的自适应边缘保持去噪滤波[J]. 应用科学学报, 2011, 29(1): 44-50. DOI: 10.3969/j.issn.0255-8297.2011.01.008 |
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| 作者姓名： | 薛存金 温晓阳 董庆 |
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| 作者单位： | 1. 中国科学院数字地球重点实验室，北京1000942. 中国科学院对地观测与数字地球科学中心，北京100094 |
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| 基金项目： | 国家"863"高技术研究发展计划基金，国家自然科学基金，国家"973"重点基础研究发展计划基金，中国科学院对地观测中心数字地球科学平台重大项目基金 |
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| 摘 要： | 针对目前SAR图像斑点噪声滤波算法在噪声去除和边缘保持方面同时性上的不足，该文基于SAR图像噪声识别和边缘检测，提出适用于同质区域和边缘区域的自适应SAR图像去噪滤波方法. 该方法根据SAR图像斑点噪声、边缘位置、边缘方向信息，动态改变滤波器模板的尺寸和形状，实现SAR图像斑点噪声去除，同时保持图像边缘和纹理信息与细微结构. 以2010年8月15日北极地区RADARSAT-2 SAR HH图像为例，将本文的方法与典型空域滤波法进行对比分析，定量分析结果表明所提方法的可行有效.
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| 关 键 词： | 自适应滤波；去噪方法；边缘保持；SAR图像 |
| 收稿时间： | 2010-11-17 |
| 修稿时间： | 2010-12-30 |
Adaptive Despeckling Filter with Edge-Preservation for SAR Image |
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| XUE Cun-jin,WEN Xiao-yang,DONG Qing. Adaptive Despeckling Filter with Edge-Preservation for SAR Image[J]. Journal of Applied Sciences, 2011, 29(1): 44-50. DOI: 10.3969/j.issn.0255-8297.2011.01.008 |
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| Authors: | XUE Cun-jin WEN Xiao-yang DONG Qing |
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| Affiliation: | 1. Key Laboratory of Digital Earth, Chinese Academy of Sciences, Beijing 100094, China;2. Center for Earth Observation and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China |
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| Abstract: | To deal with the conflict between speckle removal and edge preservation in the SAR despeckling operations, we propose an adaptive despeckling filter that can preserve edges based on noise identification and edge detection oriented to SAR images. In the filter, the template’s size and shape are adaptively changed according to the noise characteristics, and the edge position and direction in homogeneous and edge regions.This way, noise in the SAR image is reduced, while edges are sharpened, and texture and fine structures preserved. RADARSAT-2 SAR HH images covering the North Arctic Pole obtained on August 25, 2010 are used in the experiment. The results show validation and practicability of the method. |
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| Keywords: | adaptive filter despeckling algorithm edge-preserving SAR image |
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