- From: Chris Lilley <chris@w3.org>
- Date: Mon, 2 Apr 2018 16:19:48 -0400
- To: public-colorweb@w3.org
- Message-ID: <7143e99b-66d3-cf99-f382-258928a0f1a1@w3.org>
Hi folks, It was recently pointed out[0] that the XYZ values for the D50 illuminant given on, for example, Matlab[1] or Bruce Lindbloom's site[2] |[0.96422, 1.00000, 0.82521]| differ from the once specified by the ICC |[0.9642, 1.0000, 0.8249]| || "In ICC v4, the requirement was introduced that the media white point of a Display class profile shall be equal to D50 (i.e. [96.42, 100, 82.49])" [3]. I assume the authoritative source is the CIE. I will check my books this evening, but can anyone shed light on the discrepancy (and the correct value)? [0] https://github.com/w3c/csswg-drafts/issues/2492#issuecomment-377913660 [1] https://www.mathworks.com/help/images/ref/whitepoint.html?s_tid=gn_loc_drop [2] http://www.brucelindbloom.com/index.html?Eqn_ChromAdapt.html [3] http://www.color.org/whyd50.xalter -- Chris Lilley @svgeesus Technical Director @ W3C W3C Strategy Team, Core Web Design W3C Architecture & Technology Team, Core Web & Media
Received on Monday, 2 April 2018 20:19:55 UTC