Compartive Evaluation of Standard and Adaptive Median Filter for Removing Different Type of Noises

In the present paper a comparative performance evaluation of standard median filter and adaptive median filter for impulsive and non- impulsive noises has been discussed. The Adaptive Median Filter eliminates the problems faced with the standard median filter, preserving the edges while smoothing the image. The difference between the two filters is that, in Adaptive Median Filter, the size of the window surrounding each pixel is variable. This variation depends on the median of the pixels in the present window. It is seen that impulse noise is greatly attenuated if filtered adaptively.

Keywords: De- noising, median filtering, Adaptive median filtering, impulsive noise, non-impulsive noise