An Improved SAR Image Speckle Filter

摘要：

An improved SAR image denoising method based on sigma filter was proposed here. Firstly, we analyzed the traditional sigma filter and showed its weakness in removing complex noise while maintaining sharpness of edges. Secondly, the sigma filter was modified to accommodate to image with complex noise. Tben, to maintain the sharpness of weak edges, we put forward a new method named grey center offset sigma filter (GCOSF). In GCOSF, canny detector is utilized to detect regions containing edges. We adopt grey center offset value instead of center value to calculate filtering result Last, experimental results demonstrate that the GCOSF performs better than traditional sigma filter and several other filters by considering the effect of noise removing and edge keeping simultaneously.

关键词： SAR image sigma filter grey center offset complex noise weak edge edge preserving

作者: LI Zhuang WANG Kun-peng

作者单位: College of Aerospace and Material Engineering National University of Defense Technology Changsha,China

会议类型: 国际会议

会议名称: The 2nd IEEE International Conference on Advanced Computer Control(第二届先进计算机控制国际会议 ICACC 2010)

会议地点: 沈阳

会议语种:英文

页码: 139-143

在线出版日期: 2010-03-27（万方平台首次上网日期，不代表论文的发表时间）