[Scribus] CMYK question

[Tino Schwarze]

Hi there,

On Wed, Aug 10, 2005 at 05:43:52PM +0200, Tobias Hilbricht wrote:

> > Scribus of course exports CMYK. Dont know if it autoconverts pixel
> > images form RGB to CMYK though (perhaps others on this list can help).
> > If it doesnt you can use an open-source tool called ImageMagick
> > (if you use Linux you've probably already have it installed).
> > Use it like:
> >
> > convert -colorspace CMYK rgb.jpg cmyk.jpg
> 
> This is only a "mathematical" conversion. Recent ImageMagick versions which 

And as such, it is completely useless.

> have been compiled properly (that is with lcms) do much better with
> 
> convert RGB.tiff -profile RGB.icc -profile CMYK.icc CMYK.tiff
> 
> with RGB.icc and CMYK.icc being appropriate profiles (e.g Adobe RGB and 
> EuroscaleCoated). ImageMagick is available for Windows, too.

The tool jpegicc from littlecms does a pretty good job converting
between profiles. It works like this:

jpegicc -i inputprofile.icc -o outputprofile.icc -t1 -b input.jpg output.jpg

(Just call without arguments to get help.)

Bye, Tino.