From: terje.mathisen@tmsw.no   
      
   Lawrence D’Oliveiro wrote:   
   > On Fri, 17 Oct 2025 22:29:28 -0400, Robert Finch wrote:   
   >    
   >> I do not understand why monitor would go beyond 9-bits. Most people   
   >> can't see beyond 7 or 8-bits color component depth. Keeping the   
   >> component depth 10-bits or less allows colors to fit into 32-bits. Bits   
   >> beyond 8 would be for some sea creatures or viewable with special   
   >> glasses?   
   >    
   > Under ideal conditions (comparing large areas), the human eye can   
   > distinguish about 10 million colours. Round that up to 2**24, and you get   
   > the traditional 8-by-8-by-8 RGB “full colour” space.   
      
   10 million is more than what I've heard/seen, but OK:   
      
   More interesting is the fact that females tend to have about 10x the    
   ability to distinguish colors compared to men, due to the fact that the    
   blue-green receptors are tied to the X chromosome, and they don't have    
   to be exactly the same. I know this is true for my wife and me, but on    
   the other hand I have much better monochrome vision so I can see better    
   when it is quite dark.   
      
   >    
   > However, consider your eye’s ability to adapt to a dynamic range from a   
   > dim room out into bright sunlight. Now imagine trying to simulate some of   
   > that in a movie, and you can see why the video images will need more than   
   > 8-by-8-by-8 dynamic range.   
      
   In reality they don't even (really) try. :-)   
      
   Many years ago, they even had to shoot all night-time scenes during the    
   day because the film and cameras didn't have nearly enough dynamic range.   
      
   Terje   
      
   --    
   -    
   "almost all programming can be viewed as an exercise in caching"   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)