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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/7329

Title: Improving the Effectiveness of the Median Filter
Authors: Boateng, Kwame Osei
Asubam, Benjamin Weyori
Laar, David Sanka
Issue Date: 2012
Publisher: International Journal of Electronics and Communication Engineering
Citation: International Journal of Electronics and Communication Engineering, Volume 5, Number 1 (2012), pp. 85-97
Abstract: Digital images are often corrupted by Impulse noise due to errors generated in noisy sensor, errors that occur in the process of converting signals from analog-to-digital and also errors that are generated in the communication channels. This error that occurs inevitably alters some of the pixels intensity while some of the pixels remain unchanged. In order to remove impulse noise and enhance the affected image quality, we have studied the median filter and are proposing a method based on an improved median filtering algorithm. This method removes or effectively suppresses the impulse noise in the image whiles preserving the image edges information and enhancing the image quality. The proposed method is a spatial domain approach and uses the overlapping window to filter the signal based on the selection of an effective median per window. The approach chosen in this work is based on a functional level 2n +1 windowthat makes the selection of the normal median easier, since the number of elements in the window is odd. The median so chosen is confirmed as the effective median or, where the median is an impulse a more representative value is sought and used as the effective median. The performance of the proposedeffective median filter has been evaluated in MATLAB simulations on an image that has been subjected to various degrees of corruption with impulse noise. The results demonstrate the effectiveness of our algorithm vis-à-vis the standard and adaptive median filtering algorithms.
Description: Article published in International Journal of Electronics and Communication Engineering, 2012 .
URI: http://hdl.handle.net/123456789/7329
ISSN: 0974-2166
Appears in Collections:College of Engineering

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