“…It is hard to balance performances between speckle noise reduction and detail preservation. In general, traditional despecking methods [277], [278], (such as multilook processing [262], filtering [263], [264], [282], [284], blocking matching 3D (BM3D) [265], [280], wavelet-based [266]- [269], [282], separated component-based [270]), transform the multiplicative noise into additive noise by logarithm operation of observed data. These methods, however, can introduce more or less bias into denoised image.…”