Open-loop adaptive filtering for speckle reduction in synthetic aperture radar images

The two-dimensional adaptive correlation enhancer algorithm (2DACE) is an open-loop adaptive filtering technique that can be applied to synthetic aperture radar (SAR) images for the purpose of reducing speckle. This paper includes the development of the 2DACE algorithm and the optimum filter parameters for this specific task. The unique implementation of 2DACE with a data amplitude pre-compression operation was proven to effectively reduce speckle, enhance fine features, and maintain image resolution.