ScRGB color space

scRGB is an RGB (Red Green Blue) color space created by Microsoft for use in its GDI+ API in Windows Vista. It uses identical color primaries and white/black points as the sRGB color space, but uses 16-bit floating point (half precision) linear values instead of gamma compressed 8-bit integers. It allows values outside of the [0..1] range, creating a much larger effective gamut. It also has greater precision because the half-precision format has a 10-bit significand.

Specification of transformations

Transformation from CIE XYZ to RGB

: $egin{bmatrix}R_{linear}\G_{linear}\B_{linear}end{bmatrix}=egin{bmatrix}3.2410&-1.5374&-0.4986\-0.9692&1.8760&0.0416\0.0556&-0.2040&1.0570end{bmatrix}egin{bmatrix}X \ Y \ Z end{bmatrix}$

Transformation from RGB to CIE XYZ

: $egin{bmatrix}X\Y\Zend{bmatrix}=egin{bmatrix}0.4124&0.3576&0.1805\0.2126&0.7152&0.0722\0.0193&0.1192&0.9505end{bmatrix}egin{bmatrix}g(R_{srgb})\ g(G_{srgb})\ g(B_{srgb})end{bmatrix}$

Transformation from 16-bit scRGB to 8-bit sRGB

Transformation from 8-bit sRGB to 16-bit scRGB

References

* [http://webstore.iec.ch/webstore/webstore.nsf/artnum/029678 The standard IEC 61966-2-2]
* A [http://www.colour.org/tc8-05/Docs/colorspace/61966-2-2NPa.pdf working draft] of IEC 61966-2-2 is available online.

External links

* [http://blogs.msdn.com/tims/archive/2006/06/02/614616.aspx Which Colour Is Darker in WPF - Gray or DarkGray?] , from Tim Sneath’s blog, June 2006
* [http://www.eightypercent.net/Archive/2003/10/23.html scRGB as Unicode] , October 2003
* [http://blah.winsmarts.com/2006-12-WPF__Welcome_scRGB_-_New_friend_of_Red,_Green,_Blue.aspx WPF: Welcome scRGB – New friend of Red, Green, Blue] , blah!bLaH!BLOG!!, December 2006
* [http://www.extremetech.com/article2/0,3973,1170686,00.asp ExtremeTech: Defining scRGB]

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ScRGB color space

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