| 基于ROEWA和Gabor滤波的SAR图像边缘提取 |
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| 引用本文： | 孔莹莹. 基于ROEWA和Gabor滤波的SAR图像边缘提取[J]. 光电子．激光, 2010, 0(8): 1257-1263 |
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| 作者姓名： | 孔莹莹 |
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| 作者单位： | 南京航空航天大学信息科学与技术学院； |
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| 基金项目： | 国防基础研究基金资助项目(T0614-041);;江苏省研究生创新计划资助项目(CX08B_078Z) |
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| 摘 要： | 针对合成孔径雷达(SAR)图像特有的乘性噪声和非恒虚警统计特性很难正确提取目标边缘的问题,提出了在指数加权均值比(ROEWA)算子基础上寻找自适应的最佳局域Gabor滤波器进行目标边缘提取的方法。利用Gabor滤波器具有的多方向特性确定边缘方向,然后用最大似然估计纠正错误边缘方向,重新结合视觉细胞倍频程计算出Gabor函数的最佳局域滤波参数,提取出SAR图像的正确边缘。实验表明,该方法取得很好边缘提取效果,并且后期分割出的目标更符合实际目标形态,具有较强的通用性。
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| 关 键 词： | 合成孔径雷达(SAR) 指数加权均值比(ROEWA) 相干斑 边缘提取 Gabor滤波 目标提取 |
A new edge detection method for SAR image based on ROEWA and gabor filter |
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| KONG Ying-ying. A new edge detection method for SAR image based on ROEWA and gabor filter[J]. Journal of Optoelectronics·laser, 2010, 0(8): 1257-1263 |
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| Authors: | KONG Ying-ying |
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| Affiliation: | College of information science and technolog,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China |
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| Abstract: | Due to the presence of speckle,which can be modeled as a strong,multiplicative noise,edge detection in synthetic aperture radar(SAR) images is extremely difficult.We propose a new step-edge detector for SAR images,which is search of the best local adaptive Gabor filter based on ROEWA.Edge directions are determined by multi-direction characteristics of Gabor filter.At the same time,errors of edge directions are rectified by maximum likelihood estimation.By combination of the visual cells octave a... |
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| Keywords: | synthetic aperture radar(SAR) ratio of exponentially weighted averagers(ROEWA) speckle noise edge detection Gabor filter extraction goals |
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