A Median based Directional Cascaded with Mask Filter for Removal of RVIN
Jyotsna Kumar Mandal · International Journal of Information Sciences and Techniques · 2012
In this paper A Median Based Directional Cascaded with Mask (MBDCM) filter has been proposed, which is based on three different sized cascaded filtering windows.The differences between the current pixel and its neighbors aligned with four main directions are considered for impulse detection.A direction index is used for each edge aligned with a given direction.Minimum of these four direction indexes is used for impulse detection under each masking window.Depending on the minimum direction indexes among these three windows new value to substitute the noisy pixel is calculated.Extensive simulations showed that the MBDCM filter provides good performances of suppressing impulses from both gray level and colored benchmarked images corrupted with low noise level as well as for highly dense impulses.MBDCM filter gives better results than MDWCMM filter in suppressing impulses from highly corrupted digital images.