6 April 1998 Adaptive α-trimmed filters for speckle image processing
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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.
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Vladimir V. Lukin, Vladimir P. Melnik, Victor I. Chemerovsky, Jaakko T. Astola, Pauli Kuosmanen, Kari P. Saarinen, "Adaptive α-trimmed filters for speckle image processing", Proc. SPIE 3304, Nonlinear Image Processing IX, (6 April 1998); doi: 10.1117/12.304601; https://doi.org/10.1117/12.304601

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