Re: How to get the DE 94
Re: How to get the DE 94
- Subject: Re: How to get the DE 94
- From: "Steve Lawrence" <email@hidden>
- Date: Wed, 22 Oct 2003 19:34:13 +0100
- Thread-topic: How to get the DE 94
Johannes Hoffstadt wrote:
>
> your factors for chroma in sc and sh gave me a start.
>
> You use 0.048 and 0.014, but shouldn't these read 0.045 and 0.015?
Graham Gill replied:
>
There is some flexibility in CIE94. The use of symmetric or
>
non symmetric chromanance, for instance, and the choice of
>
"k" factors.
>
>
Various references seem to disagree on these parameters (the
>
authoritative reference doesn't seem to be on line unfortunately).
>
>
For instance, 0.048, 0.014:
>
>
<http://colour.derby.ac.uk/colour/info/glossary/c/CIE94.html>
>
<http://www.brucelindbloom.com/index.html?Calc.html>
>
>
and 0.045, 0.015:
>
>
<http://www.datacolor.com/color_experts_007.shtml>
>
<http://www.axiphos.com/Color_Differences.pdf>
>
>
So I have no idea which is correct, although I tend to
>
favour the Derby reference.
>
Interesting, I would have favoured the colour group at Derby and the
ever excellent Bruce Lindbloom to. Then when I went and checked Burn's
"Principles of Color Technology" and Hunt's "Measuring Colour" they both
use 0.045 and 0.015.
Hmm...<g>
Steve Lawrence
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.