Application of SAR Image De-speckling Method Based on Improved Frost Filter
Wang Zhichao · 2009
Aimed at the importance of speckle filtering for SAR image and the problem of filtering already existed,the disadvantage of blindfold smoothing Frost filter with equal weight was indicated when proceeding areas with detailed features and an improved method was proposed based on the analysis of the parameters of Frost filter.The weights were computed by using the difference in gray values.The blindfold problem was solved at a certain extent because of taking account of the intensity information in the filter window.Experimentation validated this algorithm,and the Speckle Index(SI) and Edge Preservation Index(EPI) also were taken to evaluate the smoothing and edge preservation capability by comparing with the Frost filter.