[argyllcms] Re: Use of calibrated display to profile digital camera
- From: "Preben Soeberg" <prsodk@xxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Sun, 27 Jul 2008 12:09:05 +0700
> -----Original Message-----
> From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-
> bounce@xxxxxxxxxxxxx] On Behalf Of Ben Goren
> Sent: 27 July, 2008 11:29
> To: argyllcms@xxxxxxxxxxxxx
> Subject: [argyllcms] Re: Use of calibrated display to profile digital
> camera
>
> On 2008 Jul 26, at 9:00 PM, Preben Soeberg wrote:
>
> > I was considering if Hexachrome (or similar) inkset could be used to
> > make
> > such a target.
> > The gamut of Hexachrome is about twice that of CMYK, but the inks
> > has got a
> > small quantity of fluorescent color added in order to maximize the
> > gamut.
> > Like CMYK, Hexachrome lacks gamut in the blue area.
> >
> > Does somebody here know if it is feasible to use Hexachrome inkset
> > (pigment
> > or dye) for targets?
>
> If so, then most inkjets should be even better. My Canon i9900 has
> eight inks (CMYK plus Red, Green, light cyan, and light magenta --
> basically hexachrome plus light pigments to reduce visible dot
> patterns), and the high-end printers generally use twelve. The Canon
> LUCIA inkset is CMY + RGB + light C + light M + two different blacks +
> gray. The HP Vivera inkset is the same, but substitutes a gloss
> enhancer for the non-light C.
>
> My concern with using a printer is similar to Graeme's concern with
> using a computer monitor. Sure, you can create a wide range of
> tristimulus values, but you might be using just a few spiky sources to
> do so. Ideally, you'd want your target to reflect every part of the
> spectrum so that a real-world object that reflects a very narrow
> portion of spectrum -- in a range that your printer's inks reflect
> nothing -- will be accurately accounted for by the profile.
>
> I don't know if printer inks are ``good enough'' for the task -- I
> suspect not, or else GMB wouldn't get away with charging $300 for
> their targets. But, if they are...well, I'd be all over that. I'll
Yes, I've got your point. But I guess that Pantone certification puts some
demands on the spectral composition of the inks.
Maybe only Mimaki and Roland have ever made certified Hexachrome inks for
inkjets.
> print me up a 13x19 matte-finish target with three times as many
> patches as the GMB one, all for the cost of a sheet of paper and a few
> drops of bulk ink.
>
> But I suspect I'll instead be just printing some of the patches on the
> inkjet and filling in the remaining patches with pastels or whatever.
>
> Cheers,
>
> b&
Other related posts:
