On 8/29/13, Richard Hughes <hughsi...@gmail.com> wrote: > Do either of you know where the CIE refers to D65? I see an example as > "WhitePoint [0.9505 1 1.0890]" in the EPS example, but nothing > approaching a standard.
To me the CIE website seems not user-friendly. However, this bit of code lists the following D65 values from ASTM and from Wyszecki & Styles: https://github.com/fhoech/opi.py/blob/master/lib/colormath.py ASTM E308-01 D65: {"X": 0.95047, "Z": 1.08883} Wyszecki & Stiles D65: {"X": 0.95017, "Z": 1.08813} Tracking down ASTM and Wyszecki & Stiles: http://www.astm.org/DATABASE.CART/HISTORICAL/E308-01.htm http://www.amazon.com/Color-Science-Concepts-Quantitative-Formulae/dp/0471399183 Lindbloom uses the ASTM D65 values (http://www.brucelindbloom.com/index.html?Eqn_ChromAdapt.html) Why the different D65 values? Are white point values really specified to 5 decimal places in the standards? Or are the values on the web rounded? Is either ASTM or Wyszecki/Styles "the" standard? Elle ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
