Speckle Removal for SAR Single-look Images by Simulated Annealing
Zhou Yin · Dianzi xuebao · 2003
Simulated annealing presents an additional way to suppress speckle in Synthetic Aperture Radar (SAR) images.This was exemplified by the simulated annealing algorithm for SAR Radar Cross Section (RCS) estimation developed by R.G.White.However,analysis shows White's algorithm can be refined when it is applied to a SAR single look image.Taking account of the speciality of the single look SAR image,this paper proposes another neighborhood model and a new objective function based on the model,and then suggests a novel simulated annealing algorithm.Theoretical analysis and experimental results using simulated and real SAR single look images show that,the novel algorithm improves structure preservation without degrading the speckle reduction in homogeneous areas.Moreover,it causes less radiometric distortion and shortens time cost with satisfying results.