[filmscanners] Re: Are there multiple versions of SRGB?

["Bob Frost" <bob@frost.name>]

Joel,

There may only be one official version - called sRGB IEC61966-2.1 - but even
Apple have tweaked it and produced their own version:-

"The only difference between sRGB IEC61966-2.1 and the sRGB Profile
Apple ships is at the low end of the gamma curve.  The standard
specifies a linear response at the very darkest end of the range, then
a 2.2 gamma curve for everything else.  Apple's sRGB Profile is a 2.2
gamma curve for its entirety, which can be described by a smaller
profile. John Gnaegy".

So it is not suprising if Nikon et al have done their own mods.

Now we even have a new official version - sRGB64.

Bob Frost.


----- Original Message -----
From: <joel@perfect-flight.com>
>
> Are there multiple versions of SRGB?

The sRGB color space has a strict definition.  There is only one version.
I'm not quite sure what Nikon is trying to say there -- maybe an editing
error, or they make modifications to the sRBG specification with some other
parameter on top of it, like sRBG with 2.0 gamma.  I'm just guessing......

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