Re: [Lcms-user] Apply profile with PCS = cmsSigXYZData, Color Space = cmsSigGrayData

[Aaron B. <bo...@gm...>]

Noel, thank you! I am beginning to understand.

Currently, in my design, the user cannot specify the colour space that they
will save the data in.
I think this needs to be implemented. Currently, we always assume sRGB.
But, for grayscale, this may not be the best approach, as you mentioned.

Following your suggestion, for TIFF, I am now simply storing the ICC
information in the TIFF file and NOT
applying a transform. I will also look into  doing this for PNG.

For other formats, I will need to allow the user to specify the gamma and
white point, I suppose.



On Mon, Feb 20, 2017 at 12:34 PM, Noel Carboni <
NCa...@pr...> wrote:

> Oh, and one more thing I meant to mention...
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> A tone curve with a pure 2.2 gamma function is very different than an sRGB
> tone curve where it really counts - down in the small values (near black).
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> Just thought I'd throw that out there as food for thought.
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> -Noel
>