Prediction of Despeckling Efficiency of DCT-Based Filters Applied to SAR Images
Oleksii S. Rubel, Владимир Васильевич Лукин, Fátima Sombra de Medeiros · 2015
This paper deals with one way to predict efficiency of despeckling for images acquired by a single-or multi-look synthetic aperture radar (SAR). A particular filter based on discrete cosine transform (DCT) and adapted to speckle characteristics is considered. Two quantitative criteria characterizing despeckling efficiency are analyzed. It is shown that even one parameter that can be calculated for image blocks sequentially or in parallel allows carrying out a rather accurate prediction. Moreover, such a prediction is possible for both spatially uncorrelated and correlated speckle.