Rajoo Pandey,  An Improved Switching Median filter for Uniformly Distributed Impulse Noise Removal.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2008, vol. 14(2). 240 - 242
    [viewed 26 May 2020]. Available from: https://publications.waset.org/pdf/11752.