PMID: 15376944Sep 21, 2004Paper

Adaptive two-pass rank order filter to remove impulse noise in highly corrupted images

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
Xiaoyin XuMansoor Sarhadi

Abstract

In this paper, we present an adaptive two-pass rank order filter to remove impulse noise in highly corrupted images. When the noise ratio is high, rank order filters, such as the median filter for example, can produce unsatisfactory results. Better results can be obtained by applying the filter twice, which we call two-pass filtering. To further improve the performance, we develop an adaptive two-pass rank order filter. Between the passes of filtering, an adaptive process is used to detect irregularities in the spatial distribution of the estimated impulse noise. The adaptive process then selectively replaces some pixels changed by the first pass of filtering with their original observed pixel values. These pixels are then kept unchanged during the second filtering. In combination, the adaptive process and the second filter eliminate more impulse noise and restore some pixels that are mistakenly altered by the first filtering. As a final result, the reconstructed image maintains a higher degree of fidelity and has a smaller amount of noise. The idea of adaptive two-pass processing can be applied to many rank order filters, such as a center-weighted median filter (CWMF), adaptive CWMF, lower-upper-middle filter, and soft-decisio...Continue Reading

References

Feb 5, 2008·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Hakan Güray SenelBenoit Dawant
Feb 6, 2008·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·H L Eng, K K Ma
Jan 1, 1996·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·E AbreuK Arakawa

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Citations

Nov 2, 2006·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Jose M PalomaresAlberto Prieto
Apr 13, 2006·IEEE Transactions on Medical Imaging·Arnold M R SchilhamMathias Prokop
Apr 4, 2006·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·M Emin Yüksel

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