On Fri, May 05, 2006 at 11:17:50PM +0200, Søren Christensen wrote:
> On Fri, May 05, 2006 at 10:59:04PM +0200, Søren Christensen wrote:
> > On Fri, May 05, 2006 at 07:35:13PM +0000, Olafur Jens Sigurdsson wrote:
> > > Þann 2006-05-05, 19:43:08 (+0200) skrifaði Søren Christensen:
> > > > I have some jpg-graphics, that I need to use in a leaflet-folder, that
> > > > shall be printed in offset.
> > > >
> > > > The jpg-graphics are in rgb-colormodel, but the printer would like to
> > > > have them in the cmyk-model.
> > > >
> > > > How can I convert between these models? Gimp doesn't seem to give that
> > > > as an option.
> > >
> > > Umm, this is a shot in the dark, but just to be the first to try and
> > > point you to something I suggest you have a look at the Imagemagick
> > > tools.
> >
> > Perhaps, that would be a good guess, but the documentation does not give
> > me a hint.
> >
> > convert can have the option -type with several values, "ColorSeparation"
> > being my best guess, but the documentation is not giving an answer.
> >
>
> Need to correct myself.
>
> convert -colortype CMYK did the job.
>
Be careful! This will (probably) give you a transformation to CMYK
without using colour management. When your picture is printed, you will
likely be disapointed with the results.
There is a colour separation plugin for the gimp which is probably the
easiest way for you to do this.
You can read about it, how to get it and use it from here:
http://www.blackfiveservices.co.uk/separate.shtml
You can ask your printer for a colour profile to use in the conversion.
There is also quite a lot about colour management on the Scribus
website: www.scribus.net
cheers
dc
--
David Purton
dcpurton@chariot.net.au
For the eyes of the LORD range throughout the earth to
strengthen those whose hearts are fully committed to him.
2 Chronicles 16:9a
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