Adaptive α-trimmed filters for speckle image processing
Владимир Васильевич Лукин, Vladimir P. Melnik, Victor I. Chemerovsky, Jaakko T. Astola, Pauli Kuosmanen, Kari P. Saarinen · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1998
A new class of adaptive (alpha) -trimmed filters well suited for processing of images corrupted with non-symmetrical p.d.f. speckle and impulsive noise is proposed. It is shown that in certain cases one can provide a better speckle reduction and impulse removal by non-symmetrical trimming. Appropriate edge/detail preservation is ensured due to adaptation of the scanning window size or application of detail preserving Lpq-filter. Selection of adaptation parameter is discussed as well. The efficiency and properties of the proposed filters are demonstrated and quantitatively evaluated for test and real data.