摘要
作为各向异性滤波器,基于迹的偏微分方程(PDE)滤波算法相对于基于散度的PDE滤波算法在相干斑抑制效果和细节保持方面都表现出了优良的性能。利用基于迹的PDE,结合极化SAR数据的自身特性,设计了基于迹的PDE极化SAR相干斑抑制方案。算法针对极化SAR数据的协方差矩阵进行操作,在保留极化信息的基础上进行滤波处理。分别选用EMISAR机载数据和RADARSAT-2星载数据进行实验,并与RefinedLee去噪算法进行对比,验证了算法的可行性。
Trace-based PDE（Partial Differential Equations） filtering algorithm,as an anisotropic filter,is of excellent performance both in speckle reduction and preserving details comparing with divergence-based PDE filtering algorithm.Using trace-based PDE and combining its own characteristics of polarimetric SAR data,a scheme on speckle reduction with trace-based PDE for polarimetric SAR images was designed.The covariance matrix of polarimetric SAR data is performed by the algorithm,while preserving the polarimetric information,the filtering process is taken.EMISAR data and RADARSAT-2 data were used for experimentation,and the feasibility of the algorithm were proved by the experimental results comparing with Refined Lee algorithm.
出处
《测绘科学技术学报》
北大核心
2012年第5期352-356,共5页
Journal of Geomatics Science and Technology
基金
国家自然科学基金项目(41071296)
