Research on Coherent Speckle Reduction in High Resolution SAR Image Based on Wavelet Transform
Zhu Jia-bing, Liang Tao · Radar Science and Technology · 2005
This paper deals with coherent speckle reduction in high resolution SAR image based on wavelet transform.First of all,the reason of generating speckle in SAR image is interpreted,the advantage and the necessity of speckle reduction based on wavelet transform are discussed.And then,it is expounded in detail how to filter for reducing speckle in wavelet transform domain,while the information contained in sub-band images is utilized for detection edge and texture detail.Finally,the application of the method to high resolution SAR images have shown that the performance of the filter is satisfactory in speckle reduction and edge preservation,and in generating visual images as well.