WASET
    Nisar Ahmed Memon,  A Novel Reversible Watermarking Method based on Adaptive Thresholding and Companding Technique.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2011, vol. 55(7). 738 - 742
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/12926.