Working color space

Started Apr 26, 2012 | Discussions thread
Chris Noble
Chris Noble Senior Member • Posts: 2,642
Re: Some misconceptions

Gollywop said:

There is a (somewhat perverted) sense in which this could be said to be true, since higher bit depth means there are more divisions between any two specific colors. However, the term resolution is not really employed in this context since there is nothing being resolved.

Well, as they say, perversion is in the eye of the beholder ;); what is being resolved here is the quantization steps in the transfer function between the input and output spaces. "Bit depth" and "resolution" are used interchangeably in lots of software processing, not just photography. Another term for exactly the same thing is "dynamic range" which is sometimes expressed in eV, dB and, yes, in "ENOB" (equivalent number of bits). It's all digital signal processing, whether the files are photographs, music, radar signals...

You have correctly identified "gamut" above, but not color space. A color space entails a set of numbers on each color in the gamut and can entail a gamma as well. Two different color spaces could, in principle, have the same gamut, so the two terms do not, and cannot, mean the same thing.

I stand corrected on that one, thank you. The color space includes a range, which is the gamut, but also has other characteristics related to the profile. I was focusing on the difference between gamut and resolution and I should have been more precise.

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