[Digikam-users] Color Mgmt: Nikon D80; Printer Profile use; GAMMAPage

Ari El ari.reads at gmail.com
Fri Dec 29 14:45:42 GMT 2006

Thanks Nicolas!

I checked out your page and played around with xcalib... the problem I have
is that I don't have the .icm of my monitor! I guess with more resources
I'll try buying a colorimeter, and that will fix the problem :)

Now I am kind of confused on 3), what I am supposed to do with the lab's
printer profile? As you mention, having the Cam's profile and a working
profile (and a calibrated monitor) seems  enough to generate a tiff for lab
printing...in my own colorspace. However I've been checking several pro labs
(just out of curiosity) and they all offer the profiles for their big
printers, what's the point? 

Maybe the lab printers don't apply the profile themselves and expect the
tiff to be already in the proper colorspace?? anyone??

If I want to create a proof copy on my small printer, I guess I'd need my
printer's own profile, not my lab's.


Nicolas Vilars wrote:
> Hi,
> Ari El a écrit :
>>   2- I used the application GAMMAPage as a poor man's monitor calibrator,
>> which if used properly is supposed to aid setting the monitor to "sRGB
>> standard 2.2". Then I set in Digikam's ICC settings "Monitor"=sRGB and
>> activated "Use color managed view"... is this correct? (I mean, I'm not
>> even
>> sure that what I'm doing makes sense or not)
> Might be correct, but... the Digikam team do NOT recommend the use of 
> the color managed view option of Digikam.
> Instead, you may have a look at Dispwin or Xcalib... see my page for a 
> howto (http://linux.vilars.com/)
>>   3- I need to make a few large prints; I am going to use a Lab that
>> provided me with the color profile of their printer. I loaded this
>> profile
>> into Digikam's ICC setting "Soft Proof", is this right? If so, when is
>> this
>> profile actually applied ? Is it when I save the image in the ImageEditor
>> in
>> tiff format to hand them over to the lab? Can someone shed some light on
>> this?  
> Well, my guess is that you should not apply the profile if your are 
> going to handle your files to a lab. If the lab use profiles for the 
> output then they will read yours (say sRGB or Adobe) and apply their 
> profile from that (after all how do you now which printer they are going 
> to use?). Now the best option is probably to discuss the matter directly 
> with your lab...
> For a home production, you would have applied the profile and printed 
> your file. Soft proofing is for display only... it will render your 
> picture as if... but not apply anything to it. To apply you have to 
> change the workspace profile to your printer profile and save your file.
>>   4- If I understood correctly, the "workspace" is a temporary space used
>> while processing. Can someone recommend what to use here? (in this case
>> the
>> application is: load the NEFs > crop & adjust > sharpen > save the tiffs
>> for
>> the lab)
> No, the workspace is your permanent profile. Typically, you want this 
> workspace as large as possible because it will allow you more finer 
> control over the color. The scheme is as follow (=> means convert into):
>  [camera] NEF (no profile) => [Digikam] NEF - nikon input profile => 
> [Digikam] NEF - workspace profile => [File] jpg/png/tiff - workspace
> profile
> Nicolas.
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