[Digikam-users] ICC file for Ricoh GXR

[Remco Viëtor]

On Monday 16 July 2012 08:38:24 Martin wrote:
> Am 15.07.2012 23:17, schrieb Marie-Noëlle Augendre:
> > You don't need an ICC profile for your camera in order to treat RAW.
> > It's for your computer screen that one would be handy (although not
> > mandatory, especially at the beginning); but you'll have to buy some
> > sensor to calibrate yourself you own device. A Datacolo Spyder for
> > example: http://spyder.datacolor.com/
> 
> Oh, not quite right. In theory you need a ICC profile for every device
> you use in your colour process. Usually these are
> - Scanner
> - Photo camera
> - Monitor
> - Printer
> 
> But it is NOT sufficient to use one profile for every device. You have
> to create one for every combination of hardware that affects colour
> presentation. For your camera this is usually light and lenses. For your
> Printer you have to profile all types of inks with all types of paper
> you use.
> 
> Where Marie is right (IMHO): You usually don't need a camera profile.
> Only if you need exact colour reproduction under different conditions
> (like technical product photography) with different devices it is
> recomendet.
> 
> It is way more important to get the white balance right.
> 
> But if you want to do serious photo editing with your computer you need
> a calibrated monitor.
> 

Fully agreed. And the reason is simple: your screen is what you use to judge 
your edits, and where you decide what image you want (warmer/colder colours, 
saturation, ...). So you want the image on your screen as close as possible to 
the final printed image (or to what others can see, if you post on the web).

I know, 90% of the other monitors will not be set up properly, but at least 
you know what you send out, so that source of errors is removed ;)

That said, if you want to profile your camera, have a look at the 'color 
passport', a colour chart/white balance card sold with a program that allows 
you to create a profile for your camera (takes about 5-10 min to generate a 
profile). (Though, if you need a camera profile for high level colour 
accuracy, see a specialist..)

And if you go that way, you'll want to use the white balance card to set the 
proper white balance, either while shooting or in post production (the only 
difference between the two concerns the embedded jpeg in the RAW, camera white 
balance setting has NO influence on the RAW data)

Remco

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