NDLI: Removal of high density salt & pepper noise through a modified decision based median filter

Content Provider	IEEE Xplore Digital Library
Author	Daiyan, G.M. Mottalib, M.A.
Copyright Year	2012
Description	Author affiliation: Dept. of Computer Science and Engineering, Islamic University of Technology, Boardbazar-1702, Bangladesh (Daiyan, G.M.; Mottalib, M.A.)
Abstract	In this paper, a modified decision based median filtering approach is presented for the restoration of gray scale and color images that are highly corrupted by salt and pepper noise. It is an enhanced decision based algorithm where noise pixels are detected in several phases based on predefined threshold value. The noise pixels are replaced by median where median value is calculated without considering 0 and 255. As a result, at high density noise environment it is very efficient to find noise free median value. The algorithm initially select 3×3 filtering window for processing corrupted pixel. When all the elements in the window are corrupted, the processing pixel is replaced by noise free last processed pixel. If the last processed pixel is 0 or 255 then the algorithm will create a filtering window with a new dimension to identify pure black and white region of the image. Experiments exhibit better result at 9×9 filtering window. In this stage a standard median filtering approach is applied to determine probable intensity value. If the median value is noise pixel then the algorithm will calculate the mean value of all elements in the window. After that, robust estimation algorithm is applied to the proposed filter to remove discontinuity of pixel intensity and smooth the restored image. Experimental result shows that it can provide very high quality restored images, when the noise density is large.
Starting Page	565
Ending Page	570
File Size	2783336
Page Count	6
File Format	PDF
ISBN	9781467311533
e-ISBN	9781467311540
DOI	10.1109/ICIEV.2012.6317448
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-05-18
Publisher Place	Bangladesh
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mean Noise Salt and Pepper Noise Switches Filtering algorithms Robust Estimator Median Robustness Image restoration
Content Type	Text
Resource Type	Article

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