WASET
    Oh-Yeol Kwon and  Sung-Il Chien,  Improved Posterized Color Images based on Color Quantization and Contrast Enhancement.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2011, vol. 59(11). 1513 - 1516
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10396.