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> >Human color vision studies easily show that the human eye can easily > >see more colors than what the 8-bit color range can support. > > > Please present some references for such human vision studies. > Without spoiling anyone's fun, I expect negative results - 8 bits is > more than adequate to reproduce all of the colours discernible to the > human eye under a fixed background level of illumination. Perhaps a better expansion is that an 8-bit system can't adaquately capture scenes in real life which have a great variance in color and brightness? Beach & Sun & Shade. Huge variance in colors, shades, etc. that the eye can see, but nothing a digial image could adaquately capture within an 8-bit range and still maintain both color shades and brightness levels shades throughout. Super-bright white sunlight bright isn't the same as a bright lightbulb white and that's a difference that can't be captured all at once within great variances in a scene. Also, the problem with in-room tests of human vision is that it doesn't take out the subjectiveness of color detection. If we could only wire up and find out how many colors the retina can actually detect seperate of the brain... Yes, lighting levels differ, but the point of imaging is to accurately record what you saw and want to image. If there aren't enough bits to capture the entire range of shades and colors correctly, it isn't enough - even if the human eye can't tell one shade from another shade in a controlled room with color patches. Of course, while studies have given figures for the human vision system at the hundreds of thousands to millions range, none have found the upper limit of human vision systems. Either way, saying humans can see less or more than 8-bit color systems is up to debate. - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.