Michimi Inoue
ABSTRACT
With recent advances in high dynamic range displays, high-gradation displays have been actively studied. High-gradation displays have more than 256 gradations. When a luminance range of a display is very wide, a luminance-difference between each pixel value becomes small by increasing a gradation number. If this luminance-difference is larger than just noticeable difference (JND), the viewer may see contours on changes in gradation. Therefore, the number of gradations must be set up so that the luminance-difference between each pixel value is smaller than JND [Toshiyuki et al. 2008]. On the other hand, in usual high-gradation studies [Seetzen et al. 2004], the number of recognizable gradations is treated as one of the performance metrics because medical use high-gradation displays are based on DICOM GSDF and have recognizable gradations. Therefore, we must examine what kind of luminance-difference is appropriate for the outside of the medical field because high-gradation displays will be used there as well.
- Fujine, T., Kanda, T., Sugino, M., Yamamoto, Y., and Ohta, N. 2008. Evaluation for display color reproduction ability using number of distinguishable colors. The Imaging Society of Japan 47, 6, 508--519.Google Scholar
- Inoue, M., Tanaka, T., Sato, M., Kasuga, M., and Hashimoto, N. 2012. An analysis of response characteristics for high dynamic range display. The 2012 International Workshop on Advanced Image Technology, 512--516.Google Scholar
- Seetzen, H., Heidrich, W., Stuerzlinger, W., Ward, G., Whitehead, L., Trentacoste, M., Ghosh, A., and Vorozcovs, A. 2004. High dynamic range display systems. Proc. of SIGGRAPH '04 (Special issue of ACM Transactions on Graphics) 23, 760--768. Google ScholarDigital Library
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