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Re: How to publish CMYK EPS on the web?



Am Donnerstag, den 20.01.2005, 09:32 +1030 schrieb David Purton:
> On Wed, Jan 19, 2005 at 08:45:33PM +0100, Joerg Rossdeutscher wrote:

> > Am Mittwoch, den 19.01.2005, 16:21 +0100 schrieb Piotr Kopszak:
> > > I would be interested in any  of your ideas concerning the question in
> > > the  subject or  simply(?)   in receiving  a  command line  parameters
> > > necessary  to obtain RGB  jpeg from  CMYK EPS  Photoshop 8.0  files in
> > > appropriate colours.  I'm using GNU  Ghostscript 7.07 that  comes with
> > > Debian.
> > 
> > 1. Install ImageMagick.
> > 2. "convert my.eps my.jpg"
> 
> This wont give you the right colours. You need something that
> understands colour management.

1. ImageMagick uses colormanagement (liblcms)

2. there is nothing like "right" colors when changing colorspace
   between RGB and CMYK. Except for pure white the color is always
   wrong.

> You will need Little CMS (excellent colour management library) and some
> colour profiles. Google for adobe icc profiles to get some standard ones
> from adobe.

And exactly that one is used by ImageMagick.

> Although, you with some stuffing around, you might be able to use
> gs7.07, I *highly* recommend you use gs8.50, unfortunately not available
> yet as a deb, so you will need to grab source.
> 
> gs8.50 has a tiff32nc device that will give you a CMYK tiff from your
> eps, e.g:
> 
>         gs -sDEVICE=tiff32nc -sOutputFile=cmyk_image.tif cmyk.eps

ImageMagick just delegates postscript to ghostscript. If you use IM, you
use GS. Just easier.

Bye, Ratti

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