Image Enhancement using α-Trimmed Mean ε-Filters
Image enhancement is the most important challenging preprocessing for almost all applications of Image Processing. By now, various methods such as Median filter, α-trimmed mean filter, etc. have been suggested. It was proved that the α-trimmed mean filter is the modification of median and mean filters. On the other hand, ε-filters have shown excellent performance in suppressing noise. In spite of their simplicity, they achieve good results. However, conventional ε-filter is based on moving average. In this paper, we suggested a new ε-filter which utilizes α-trimmed mean. We argue that this new method gives better outcomes compared to previous ones and the experimental results confirmed this claim.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1334195Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 5271
 Pitas and A. N. Venetsanopoulos, Nonlinear Digital Filters: Principles and Applications. Boston, MA: Kluwer Academic, 1990.
 L. Yin, R. Yang, M. Gabbouj, Y. Neuvo, "Weighted median filters: a tutorial," IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing , vol. 43, no. 3, pp. 157 - 192, Mar 1996.
 A. C. Bovik, T. S. Huang, and D. C. Munson, Jr., "The effect of median filtering on edge estimation and detection," IEEE Trans. Pattem Anal. Machine Intell., vol. PAMI-9, pp. 181-194, Mar. 1987.
 G. R. Arce and R. E. Foster, " Detailed preserving ranked-order based filters for image processing," IEEE Trans. Acoust., Speech, Signal Process., vol. 37, pp. 83-98, Jan. 1989.
 K. E. Barner and G. R. Arce, "Permutation filters: a class of nonlinear filters based on set permutations," IEEE Trans. Signal Process., vol. 42, pp. 782-798, Apr. 1994.
 E. J. Coyle and J. H. Lin, "Stack filters and the mean absolute error criterion," IEEE Trans. Acoust., Speech, Signal Process., vol. 36, pp. 1244-1254, Aug. 1988.
 P. Heinonen and Y. Neuvo, "FIR-median hybrid filters," IEEE Trans. Acoust., Speech, Signal Process., vol. ASSP-35, pp. 832-838, June 1987.
 D. R. K. Brownrigg, "The weighted median filter," Commun. ACM, vol. 27, no. 8, pp. 807-818, Aug. 1984.
 H. Harashima, K. Odajima, Y. Shishikui, and H. Miyakawa, "╬Á- separating nonlinear digital filter and its applications," IEICE Transaction on Fundamentals, J65-A, pp. 297-303, 1982.
 K. Arakawa, K. Matsuura, H. Watabe, and Y. Arakawa, "A method of noise reduction for speech signals using component separating ╬Á-filters," IEICE Transaction on Fundamentals, J85-A, pp. 1059-1069, 2002.
 T. Abe, M. Matsumoto, S. Hashimoto, "Noise reduction combining time-domain ╬Á-filter and time-frequency ╬Á-filter," J. Acoust. Soc. Am. Volume 122, Issue 5, pp. 2697-2705, November 2007.
 M. Matsumoto, "Parameter optimization of median ╬Á-filter based on correlation maximization," 2nd International Congress on Image and Signal Processing, pp. 1-5, 17-19 Oct. 2009.
 I. Pitas, A. N. Venetsanopoulos, "Order Statistics in Digital Image Processing," Proceedings of the IEEE, vol. 80, no. 12, pp. 1893 - 1921, 1992.
 J. B. Bednar and T. L.Watt "Alpha-trimmed means and their relationship to the median filters," IEEE Trans. Acoust., Speech, Signal Process., vol. 32, pp. 145-153, Feb. 1987.