A. K. Bhandari and  A. Kumar and  P. K. Padhy,  Enhancement of Low Contrast Satellite Images using Discrete Cosine Transform and Singular Value Decomposition.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 707 - 713
    [viewed 25 January 2020]. Available from: https://publications.waset.org/pdf/4004.