Talk:ColorChecker

Is it still branded X-Rite?

Branding / ownership seems to be "Calibrite" now. Would be helpful to compile a list of historical branding/naming changes, with similar tools existing that look identical at first glance, but have different patches, it is quite confusing. — Preceding unsigned comment added by 94.136.7.154 (talk) 08:59, 14 January 2023 (UTC)

It is just branding. Yes, it is very confusing, sadly! Such a list would definitely be helpful imo! Zonksoft (talk) 22:21, 28 February 2024 (UTC)

L*a*b* and RGB values

Jacobolus wrote:

can we discuss this or use a different source? that source doesn't provide any explanation whatsoever of its numbers. several of the sources linked from this article have more supportable numbers

OK, I thought L*a*b* and RGB values would be useful, but since I've no better sources, I'll leave it for now. cmɢʟee୯ ͡° ̮د ͡° ੭ 11:29, 25 July 2013 (UTC)

There are at least 3 sources linked in the article which have more trustworthy numbers. But even then, to include them in the article would require explaining a bit of process behind the conversions, etc.: [1] [2] [3] –jacobolus (t) 17:17, 6 August 2013 (UTC)

Colors

So, where, exactly did the hex colors for the chart come from? It's clear that someone converted them, because the source doesn't show hex values. It's also clear because two of the 'neutral' greys have an unequal amount of blue (squares #19 and 22). Can we get a link to an actual conversion, or a note that these are calculated and do a better job of calculating them? 67.164.35.222 (talk) 00:23, 7 October 2014 (UTC)

Please dive into the details

Everybody here in wiki refers to bruce lindbloom, but nobody checks the details. Sorry but on Bruce Lindbloom site there are a lot of inconsistent use of 2° and 10° observer. — Preceding unsigned comment added by 188.62.58.119 (talk) 15:02, 24 May 2015 (UTC)

error in PDF version of the chart

Unfortunately, gray field "160,160,160" in the PDF chart is wrong. It contains the light value 120,120,120. 2003:CA:574C:C100:F02C:6D79:FDF4:7F54 (talk) 16:00, 25 November 2023 (UTC)

Spectrophotometry

I can't agree that "comprehensive spectrophotometric measurements are available". There is babelcolor.com, yes, and the X-Rite people have a confusing statement about the situation https://www.xrite.com/de/service-support/faq_colorchecker_sg_spectral_data and I would rather call this "hardly any availability of spectrophotometric data". Zonksoft (talk) 22:22, 25 February 2024 (UTC)

"Reflectance Rel. MgCO3" of Neutral 3.5 (23) seems off

The table entry for "Reflectance Rel. MgCO₃" for Neutral 3.5 (index 23) shows up as 18.6% (higher than that of Neutral 5, 18.4%). Additionally, all other Grayscale entries have a very close value in that column to that of the Y value in the "CIE xyY" column, except for that one. Can someone please check that the value is correct?

Also, I haven't found any mention of this value in any of the cited sources (Munsen 2010, Poynton 2008). I couldn't check Field 1990 ("Color Scanning and Imaging Systems"), but if that reference doesn't mention this reflectance value either then it is either unreferenced material ({{citation needed}}) or {{original research}}, both of which should be fixed. I won't add either label for the time being just in case it is in any of the references. --Cousteau (talk) 10:41, 23 October 2024 (UTC)

Apparently that addition was made by an anonymous user who didn't clarify the sources nor added any new reference when they added this column. Looks like original research (and also incorrect) and doesn't contribute to the article; I will delete that. --Cousteau (talk) 10:50, 23 October 2024 (UTC)

Deleted. --Cousteau (talk) 12:57, 24 October 2024 (UTC)