Multiple Thresholds Switching Median Filtering for Eliminating Impulse Noise in Images
Thangavelu Saravanan, Venkatesh Srinivasan, R. Udayakumar · 2013
2 Abstract: A switching median filter incorporated with a powerful impulse noise detection scheme called, Multiple Threshold Switching Median Filter (MTSMF) is proposed in this paper for enhancing the images corrupted by impulse noise during acquisition and/or transmission over communication channel. The impulse detection algorithm is used before the filtering process and therefore the noise-corrupted pixels are replaced with the estimated central noise-free ordered median value in the current filter window. The impulse detection technique is based on multiple thresholds with multiple neighborhood information of the signal in the filtering window. Extensive simulation studies and the results obtained from them show that the suggested technique is superior to the single threshold median filtering in terms of preserving edges and fine details and computational complexity. This proposed MTSMF is algorithmically simple and suitable for real-time implementation and applications.