A new SAR image filter method based on edge detection
Cao Yungang · Cehui kexue · 2010
Speckles in Synthetic Aperture Radar(SAR) images disturbs SAR images calibration,inspection,interpretation and application,thus speckle reducing is an important step in SAR images processing.Ordinary methods destroy edges information while reducing speckles.In fact,the experiments indicate that there is always a kind of tradeoff between smoothing out speckle and preserving the useful information.In this context,a SAR filter method based on edge detection result was proposed in this paper.With this method,modified ratio of average(MROA) algorithm for edge detection and mean filter algorithm were used for smoothing out speckle in non-edge area.Experiment result indicated that this method reduces speckles effectively while preserving image edges.