High dynamic range display systems
ACM SIGGRAPH 2004 Papers
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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.