[argyllcms] Re: About Hi-Res spectral mode
- From: Konstantin Pyanzin <kokap@xxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 26 Oct 2010 08:48:52 +0400
Graeme Gill wrote:
> On my CRT monitor I get DE's of:
> White 0.669815 '94: 0.635949
> Red 1.238462 '94: 0.482935
> Green 0.923645 '94: 0.306630
> Blue 1.372940 '94: 0.330161
> Cyan 0.608738 '94: 0.375159
> Magenta 1.117117 '94: 0.289138
> Yellow 0.856135 '94: 0.544060
> Whether that is of any significance, depends on your context. If it is of no
> consequence
> to you, then I guess purchasing an instrument with 1 nm resolution is not on
> your
> agenda :-) [Note that I currently have no means of verifying whether the above
> differences represent an improvement in accuracy of not.]
> Graeme Gill.
Hm, to reduce errors I took 5 measurements in each mode (Hi-Res and Normal) and
averaged the results. Then I compared the results.
For example, the colorimetric differences in deltaE [CIE 1994] on BenQ G2222HDL
display (standard gamut LED-backlit) were:
blue: 0.176
green: 0.146
yellow: 0.162
red: 0.173
magenta: 0.174
cyan: 0.106
white: 0.179
I've also tested NEC 2690WUXi2, HP LP2475w (CCFL-backlit, wide gamut); Acer
AL1716, ViewSonic VA903m (CCFL-backlit, standard gamut); netbook Asus 1201n
(LED-backlit, narrow gamut). As I pointed out previously max deltaE [CIE 1994]
was less than 0.3
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