SAR Image Speckle Reduction Algorithm Based on Linear plan
Jincheng Zhang · Jisuanji fangzhen · 2010
Tradition threshold methods have exposed many shortcomings when they were applied in speckle reduction,which can make noise reduction unbalance on different frequency bands and be bad for rebuilding SAR image and preserving details.A new best threshold algorithm is presented for speckle reduction in this paper.It can make sure the most accurate threshold on different decomposing layer.Combining with classical linear plan method,threshold searching problem can be abstracted as linear plan problem if wavelet coefficient and amount of decomposing layer have been known before.Graphic solution way can be used to calculate best threshold on different decomposing layers.The new method can make sure the best threshold is searched on different applied requirement.However,it can get better effect on speckle reduction to aim for better SAR images for compressing,transmitting and rebuilding processings.The experimental results show that the new algorithm can make good effect on speckle reduction,meanwhile it can reserve details of SAR images and has good effect on rebuilding SAR images.