Re:: Dumb question - Printing Colorchecker
Re:: Dumb question - Printing Colorchecker
- Subject: Re:: Dumb question - Printing Colorchecker
- From: edmund ronald <email@hidden>
- Date: Wed, 26 Oct 2005 16:21:38 +0200
Hi Danny, thanks for your support.
1. I used i1share 1.4 to make the measurements. Which version does
what re. conversion?
2. I exported the data into a Photoshop palette in AdobeRGB (probably
my mistake here, I'll try saving into LAB). I then pasted the values
by filling the various squares, into the AdobeRGB version of your
Colorchecker. I'm starting to understand this may have been a mistake,
and will do some checking myself.
3. I'm appending the various data -spectral and palette - to the copy
of this email that is being sent directly to you. If somebody wants to
write a macro to automate this stuff ...a macro to compute the errors
from the print would also be welcome ...
4. My paper settings were the same as used for profiling, and the
paper profile was applied, for the print (not for the testchart). The
relative colometric print was actually pretty good, optically. However
I had issues with the red and skin color, which made me measure the
plastic colorchecker sample I was using, which seems different from my
memory of my previous cardboard chart. A friend made the same remark
abut a memory color difference.
5. As far as I can see, the red is well within the profile's gamut for
this glossy paper, I checked with Colorthink.
6. I really would like to have a standardized procdedure for
measure-print-test for the colorchecker documented somewhere, with
some macros, maybe to do it faster.
On 10/26/05, email@hidden <email@hidden> wrote:
> Hello Edmund,
>
> Hope you had a good vacation where there is no storms, no
> earthquakes, no tsunamis, no ozone holes, no uncalibrated
> printers, no...
>
> You say:
> >I have an image of the Colorchecker
> > from Danny Pascale's site, updated with my own sample's
> >values.
>
> This is the L*a*b* version (I suspect!)?
> If not, then have you used i1 Share to get your RGB data?
> i1 Share gives you RGB in Abs. Colorimeteric (the older
> versions of i1 Share gave Rel Col).
>
> From Photoshop (File/Print with Preview...):
> Let Photoshop determine colors
> Printer profile: your calibrated printer profile
> Relative colorimetric, black point compensation
>
> Have you set your printer color management to "OFF" and
> selected the same paper as the one used for profiling?
> You may just have forgot that one after your vacation!
>
> Hope this helps.
>
> Oh!, since you have a new ColorChecker, could you send me
> a file of the spectrum data? (Any format, ASCII, CXF, etc)
> I would compare it with the average shown on the web site.
> (Thanks!)
>
> Danny Pascale
>
> email@hidden
> www.BabelColor.com
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