用自适应滤波算子祛除ERS-1星载SAR影像上的斑点噪声
刘玉贤;
摘要(Abstract):
地球表面对电磁波进行后向散射时的不连续性和动态性,在SAR影像上产生大量的斑点噪声。在对SAR影像进行祛噪声处理时,所采用的滤波算子要既能祛除斑点噪声,又能保持影像的纹理信息。基于非静态平均和非静态方差影像模型的Kuan噪声滤波算子,能随着局部影像统计特性的变化而调整影像平滑的权值和保持原影像信息的权值。对一帧荷兰某地区的ERS-1星载SAR影像进行的滤波处理实验表明,该算子能有效地祛除ERS-1星载SAR影像上的斑点噪声,并能保持影像上的纹理信息。
关键词(KeyWords):
基金项目(Foundation):
作者(Authors): 刘玉贤;
参考文献(References):
- [1] Kuan D. T., Adaptive noise smoothing filter for images with signal dependent noise, IEE Trans, on Pat. Ana. and Mach. Int. Vol. PAMI 7, No. 2, March 1985
- [2] Lopes A. & Touzi R., Adaptive Speckle filtering for SAR images, 1988 International Geoscience and Remote Sensing Symposium, Vol. 3, P1263-1266
- [3] A. P. Sage and J. I., Melsa, Estimation Theory with Applications to Communications and Control, New York: McGraw-Hill, 1971
- [4] Lopes A. & Touzi R., Extraction of the backscattering coefficient of agmcultural fields from an airborne SAR images, Proc. IGARSS'86 Syrup., Zurich, 8-11 Sept, 1986 Ref. ESA SP-254, P621-627
- [5] W. K. Pratt, Digital Image Processing, New York: Wiley-Interscience, 1978