"Cousin Ricky" <rickysttATyahooDOTcom> wrote:

> When you use assumed_gamma srgb, the scene's nonlinearity aligns with the color
> definition, which is why rgb and srgb return the same value.  And since sRGB is
> close to gamma 2.2, rgb and srgb return close, but not identical, values under
> assumed_gamma 2.2.

"Unlike most other RGB color spaces, the sRGB gamma cannot be expressed as a
single numerical value. The overall gamma is approximately 2.2, consisting of a
linear (gamma 1.0) section near black, and a non-linear section elsewhere
involving a 2.4 exponent and a gamma (slope of log output versus log input)
changing from 1.0 through about 2.3. The purpose of the linear section is so the
curve does not have an infinite slope at zero, which could cause numerical
problems."

https://en.wikipedia.org/wiki/SRGB

So there needs to be a function(_r, _g, _b) {} with a select () statement in it.

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