[argyllcms] How is delta E calculated in colprof?
- From: Stephen T <stwebvanuatu@xxxxxxxxxxxx>
- To: Argyll CMS <argyllcms@xxxxxxxxxxxxx>
- Date: Thu, 19 Jul 2012 04:22:33 -0700 (PDT)
Hello,
I have calculated delta E 2000 from the colprof output (option -y) in a
spreadsheet and with Bruce Lindbloom's web-based calculator:
http://www.ece.rochester.edu/~gsharma/ciede2000/dataNprograms/CIEDE2000.xls
http://www.brucelindbloom.com/index.html?ColorDifferenceCalcHelp.html
Both of the above are consistent but colprof's delta E values are different and
do not match DE76 and DE94 either.
Which delta E is colprof reporting? The documentation states only that "a
summary of the average and maximum Lab delta E's will be printed out if this
flag [-y] is set".
Is colprof applying any weighting to the DE00 calculation: KL, KC, KH not equal
to 1.0?
Stephen.
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