[argyllcms] Re: Kodak Graycard spectral file

Vielen danke Klaus für diese measurements!

Roger

> -----Message d'origine-----
> De : argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-
> bounce@xxxxxxxxxxxxx] De la part de Klaus Karcher
> Envoyé : 10 janvier 2010 13:38
> À : argyllcms@xxxxxxxxxxxxx
> Objet : [argyllcms] Re: Kodak Graycard spectral file
> 
> Pascal de Bruijn wrote:
> > On Sun, Jan 10, 2010 at 3:17 PM, Pascal de Bruijn
> <pmjdebruijn@xxxxxxxxx> wrote:
> >> Hi,
> >>
> >> Does anybody have a spectral (.sp) file of a Kodak Graycard?
> >
> > I'd like to see it for comparison purposes... I just spotread two
> > cheaper "graycards" I had lying about...
> >
> > Regards,
> > Pascal de Bruijn
> 
> Here is a plot containing your graycards and some other gray reference
> data I have handy: a really old Graycard from Kodak (if I remember
> correctly) and a DGC-100 Graycard from Robin Myers (both measured with
> my eye-one pro and argyll 1.1 RC4 in highres mode), one patch of a
> Kodak/Tiffen Q13 Grayscale (averaged Spectrolino measurements), a
> Neutral patch from ColorChecker SG (Xrite PM Reference file) and a
> Neutral Munsell 4.75 Chip (measured with a Perkin-Elmer Lambda 18
> (SPEX) with 1nm resolution).
> 
> Needles to say that the micnova graycard is crap while the dealextreme-
> graycard looks pretty good.
> 
> I guess one should take the eye-one / argyll 1.1 RC4 highres readings
> for λ > 740 with a pinch of salt: the steep fall-off at the red end of
> the spectrum seems not plausible to me.
> 
> Klaus


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