See Zi Siang and  Khairul Hazrin Hashim and  Harold Thwaites and  Lee Xia Sheng and  Ooi Wooi Har,  Retrieving Extended High Dynamic Range from Digital Negative Image - An Experiment on Architectural Photo Imaging.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 1061 - 1069
    [viewed 16 October 2019]. Available from: https://publications.waset.org/pdf/15380.