Hi Andrew, I think your talkin color science and engineering and I'm talkin biology. Inability to differentiate close colors does not mean their non-existence or imperceptibility. That's not silly, its actual! DAVID SCHARF PHOTOGRAPHY *DAVID SCHARF* http://www.electronmicro.com On 1/5/20 8:33 AM, Andrew Rodney wrote:
I don't totally agree. Again, we can produce billions of numbers. Some are not colors. Some differing numbers are the same colors: R0/G255/B0 in ProPhoto RGB isn't a color. We can't see it. If you can't see it, it's not a color. It's a set of numbers. In sRGB, 1/255/240 and 2/255/240 are different triplets of numbers. They ARE the same color as the dE between the two device values is 0.01: http://digitaldog.net/files/ColorNumbersNotColors.jpg
16-bit color, the math allows us to define billion’s of color values, but that doesn’t change the fact we still can’t see 16.7 million colors in the 24 bit encoding of these pixels. As such, it’s best to talk about encoding having a potential to define millions or billions of numbers, device values, that could be associated to a color value thus color, if we could see them. But if we can’t differentiae them visibly, it is silly to suggest they are indeed colors. Don’t confuse a color number, a device value, for a color, a color you can see!
Andrew Rodney http://www.digitaldog.net/
On Jan 4, 2020, at 11:06 PM, David Scharf <electronman@roadrunner.com <mailto:electronman@roadrunner.com>> wrote:
Well we can see 16.7 million or even 1 billion colors but we just can't differentiate them.8-) David http://www.electronmicro.com