[Fwd: Re: Color Correction on Linux] (Scribus)

The following is a response I got back from a guy in Europe that does
color correction. The next step for me is to figure out what paper I'm
going to use. I also need to find out how to color correct my monitor.
As far as I know you can't do this on Linux.

If anyone has any suggestions let me know. I need some.

-------- Original Message --------
Subject: Re: SPAM-LOW: Color Correction on Linux
Date: Wed, 28 Mar 2007 00:15:54 +0100
From: Alastair M. Robinson <blackfive@fakenhamweb.co.uk>
To: Damien Hull <dhull@digitaloverload.net>
References: <46089573.1070808@digitaloverload.net>

Hi Damien,

Damien Hull wrote:

> I currently use Ubuntu Linux. Are you able to do color correction for
> Linux?

Yes, I am - I use Linux on a daily basis, and have all my equipment
colour-managed - scanner, monitor and printer.

Of these devices, the printer is the only one that can be profiled "by
remote control" - how it works is this:
You print a test chart with a few hundred known colours on it, and post
it to me. I feed it through a device here which reads the physical
colours your printer produced. This information is used to build a
colour profile, which can be used later on to print colours more
predictably.

> If the above question is "yes" here are a few more questions.
>
> 1. Can you do one for a Lexmark C534dn?

Yes, I can produce a profile for any printer.

> 2. Do I need the paper type I will be printing on?

Yes - when printing the test chart, you must use the exact same ink,
paper and driver settings as you will use when printing with the profile.

> 3. Is the file I get from you in .icc format?

Yes, it is, which means that for it to be useful you need some software
capable of using ICC profiles when printing.

GIMP currently isn't, as far as I know. Cinepaint is, I believe - and
of course my own PhotoPrint application is intended specifically for this.

> If you need more information let me now. I don't really understand how
> color correction works.

In short, an ICC profile is just a chunk of data describing precisely
which physical colours a monitor, scanner or printer associates with
given RGB or CMYK values. They're used in pairs to try and preserve
colours when converting from one device to another.

So, given a profile for your monitor and your printer, software can
adjust an image to try and match the appearance of an image on screen
and paper.

Hope this is some help - please feel free to ask if you have any more
questions :)

All the best,

--
Alastair M. Robinson
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