On Tuesday 08 October 2002 04:39 pm, Roland Roberts wrote:
>     tifftopnm RGB.tiff | pnmtotiffcmyk > CMYK.tiff
> roland

By golly it works! Reddish colors are faded a bit. I suppose the cure
is to adjust in gimp to make the image overly red and then save and do
the conversion via pnmtotiffcmyk.

I did the test by scanning the image in xsane, all default values, and
then converting that image. I compared the original scanned pnm image to
the converted image, both being viewed in kview.

Interestingly enough the converted image when loaded into Gimp had
the same color balance (to my eye at least) as the converted image
viewed in Kview. 

The two programs mentioned above by Roland are part of the netpbm 
available on sourceforge.net. netpbm replaces some older utilities
found in the pbmplus package. 

Now I have a new toy to play with! But there is a very practical
application when creating book covers etc. where the printer wants the
image in a cmyk tiff. I have to play with color balancing, flesh
tones etc. 

thanks for your help.

John Culleton

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