[OpenJDK 2D-Dev] Missing colour profiles
Jerry.Evans at Sun.COM
Wed Apr 23 21:24:18 UTC 2008
Andrew Haley wrote:
>sRGB data is (a function similar to) raising to the power 2,2,
>so to go from linear RGB to sRGB is
> Math.pow(x/255, 1/2.2) * 255
>When light levels are very low the transfer function is very nonlinear, so
>errors will be high. That's true of both lcms and Kodak, but in my opinion
>lcms is doing a better job in this case.
sRGB defines a linear section of the transfer curve for very low light
If you want to have new tests for sRGB/lRGB fidelity, you should use the
equations in the ISO standard.
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