WASET
    Koushlendra Kumar Singh and  Manish Kumar Bajpai and  Rajesh K. Pandey,  Edge Detection in Low Contrast Images.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2015, vol. 97(1). 355 - 359
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/10000808.