Bit Depth Needed for High Image Quality TV-Evaluation Using Color Distribution Index

P.34: A Video Signal Coding Method Based on an Absolute Color Space for Saving Bit Depth

“…The luminance difference ΔL satisfies the luminance JND, which requires the ratio ΔL/L= 0.01 and L is the luminance of the CDI cell in the display color gamut. It was experimentally verified that the colors in a CDI cell are visually indistinguishable under the conditions of visual adaptation to the luminance levels from 0.5 cd/m 2 to 100 cd/m 2 [1]. The CDI is defined as the ratio of the number of CDI cells that includes one or more reproducible colors and the number of all CDI cells in the display color gamut.…”

“…It was shown that the use of 36-bit RGB signal (12 bits per channel) can avoid any false contour [1]. The false contour is also called the color banding.…”

13.4: An Electro‐Optical Transfer Function with Improved Uniformity of Palette Color Distribution in Absolute Color Space

“…There are about 16.78 millions palette colors for a popular 8-bit display with three primaries. The use of higher bit depth has the advantage of more palette colors within the display color gamut and more reproducible detailed colors [1,2]. The distribution of palette colors is non-uniform in an absolute color space, e.g.…”

Study of Reducing Circuit Scale Associated with Bit Depth Expansion Using Predictive Gradation Detection Algorithm

“…A few studies report that it is necessary to process image signals at an accuracy of 12 bits/channel or better to reproduce smooth images with less false contouring and noise effects on a HDR display device [5], [6]. In fact, the digital image signal transmission systems of HDMI [7] and DisplayPort [8], for instance, are capable of transmitting up to 16 bits for each RGB color.…”