Naoto Suzuki,  Basic Research for Distinguishing Small Retinal Hemorrhages from Dust Artifact by using Hue, Lightness, and Saturation Color Space.   journal   = {International Journal of Biomedical and Biological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2012, vol. 65(5). 151 - 159
    [viewed 20 October 2021]. Available from: https://publications.waset.org/pdf/9171.