[argyllcms] Re: Use of calibrated display to profile digital camera

Ben Goren wrote:

On 2008 Jul 26, at 2:53 PM, Hal V. Engel wrote:
If you are concerned about spectral effects of the target one option is to use a target that is based on some other reproduction method that is designed to have more natural spectral characteristics. For example there are the very expensive X-Rite/GretagMacbeth targets (around $300) or the less expensive DigitaL TargeT 003. 

That actually brings up something I've been pondering.

Anybody have any suggestions on how to make a high-quality target?
I mean, sure, I could use targen and print it out on my inkjet, and I imagine it'd be better than nothing.
I used a combination of GretagMacbeth, basICColor and several self-made targets to minimize the metamerism failures of a large format scanner with fluorescent light sources.
The self-made targets were laser prints with different separations (because I know that they are extremely prone to metameric failures) and ink jet prints on baryta paper. Actually I planned to use the EPSON x880 Ink set for the ink jet targets to maximize the gamut, unfortunately the x880 printer was broken when I had to print the targets and I had to switch to a printer with the "ordinary" UltraChrome K3 ink set.
The result is a "good compromise" profile for a variety of artworks -- but of course it's always a compromise.
But I'm thinking more along the lines of, perhaps, getting carefully-selected artist's pigments and hand-applying them, with the thought of simulating the same general kinds of spectral characteristics as the ColorChecker /et al./
E.g. Roy Berns (<http://art-si.org/> uses targets made of Gamblin Conservation Colors mixed with titanium white and a special blue target made of acrylic Liquitex paints mixed with titanium white together with the GretagMacbeth ColorChecker DC for multispectral imaging -- but I think one needs special equipment to prepare them (e.g. drawdown bars to apply layers of uniform thickness). 

Klaus

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