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Adaptive order statistic filters for noise characterization and suppression without a noise-free reference

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2 Author(s)
Zhou, X. ; Dept. of Electr. & Comput. Eng., Cincinnati Univ., OH, USA ; Wee, W.G.

Several adaptive order statistic filters (OSF) are developed and compared for channel characterization and noise suppression in images. Emphasis has been put on the situation when a noise-free reference image is not available but instead we can have a sequence of two noisy output images of the same input image through the communication channel twice. One of the noisy output images is used as the reference in the OSF. It is shown theoretically that if noises are not correlated, the expected values of the derived filter coefficients will be equal to those coefficients derived using a noise-free reference. Experiments using noisy reference image yield comparable results to those methods using a noise-free reference image and also better results than those of median, Gaussian, averaging and Wiener filters

Published in:

Communications, 1998. ICC 98. Conference Record. 1998 IEEE International Conference on  (Volume:3 )

Date of Conference:

7-11 Jun 1998

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