New article on color management

Started Apr 26, 2013 | Discussions thread
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Detail Man
Detail Man Forum Pro • Posts: 16,400
Re: Camera-->sRGB versus Camera-->ProPhoto-->sRGB

All raw converters ultimately have to take the demosaiced raw camera coordinates (RGB or GMCY) and map them to XYZ or Lab, though it may be only an intermediate step. This is especially true for raw converters that use ICC profiles, where either XYZ or Lab D50 is the working space. The final mapping from XYZ to any of the standard RGB spaces is just a linear transform plus an encoding curve. The lookup tables provide a mechanism for non-linear corrections (e.g., if you need to tweak deep saturated reds differently than less-saturated reds, something the earlier matrix-only profiles obviously could not do).

- Eric Chan, Reply #51 on: July 28, 2008, 08:31:26 PM

http://www.luminous-landscape.com/forum/index.php?topic=26524.msg211284#msg211284

Iliah Borg wrote:

All raw converters ultimately have to take the demosaiced raw camera coordinates (RGB or GMCY) and map them to XYZ or Lab

Thу above is incorrect.

(Perhaps) one exception being RAW Photo Processor (RPP) ?

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