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Chapter 13. Color > Gamma Correction under CSS3

13.2. Gamma Correction under CSS3

In a nutshell, gamma describes the brightness of a computer display. On average, PC (Personal Computer) displays tend to be darker, and hence have a lower gamma value, than Macintosh, Silicon Graphics or NeXT computer displays.

There are no proposed properties that would allow the Web author direct control over the gamma value of their Web page; it would appear as though it is up to the browser developers to implement this function. Under this scheme, the default gamma value would apparently match that of typical PC systems running under MS-Windows. Many other systems operate at gamma levels that are brighter than those typically used by a PC. Under this system, a typical PC system would have a gamma correction value of 0, a Macintosh would be 1.45, an SGI system would be brighter still at 1.7 and a NeXT system brightest at 2.22.


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