On 09/26/2015 07:23 AM, Noel Carboni wrote: >> http://ninedegreesbelow.com/photography/srgb-profile-comparison.html > > Interesting article, thanks for the link. Out of curiosity, where does > the Microsoft sRGB profile (as delivered with Windows, i.e., sRGB Color > Space Profile.icm) fall in the table? Or is it there and I just don't > realize it?
The sRGB profile that was bundled with Windows 2000 falls in group 3. I don't know about newer versions of Windows, but I will guess it's the same, with the same primaries as the color.org V2 matrix sRGB profiles. > > By the way, to further the original question, an approach that can work > (I'm using it) to operate on non-linear image data linearly is this: > > 1. Derive the general tone and reverse tone curves of an image's > profile by passing grayscale values from black to white through a > transform from the image's profile to a created linear working profile. > Use the results of that to build tone and inverse tone curves and smooth > them. > > 2. Use optimized conversion processes using the tone curve data from > step 1 to access the pixels of the image. In other words, the act of > reading a pixel removes the gamma precompensation and the act of writing > a pixel restores it. Thanks! for describing this approach. Elle ------------------------------------------------------------------------------ _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
