On Wednesday 14 January 2009 05:58:48 pm minombresbond wrote: > hi > > I'm graphic designer from argentina, and user of free software, my > name is Juan Su?rez > > many times I need design simple vectorial works (like a logo) when > acurate control of cmyk values, for example, a figure with radial > gradient from 100/60/0/0 to 100/60/0/40, I can draw it in Scribus > and export to pdf to printing ok, or export to RGB bitmap or as rgb > svg to work in inkscape etc, > > but how can I make a cmyk bitmap image from cmyk vectorial art > from scribus? like a 'exporting to cmyk tiff' feature? if I export > to RGB bitmap, and convert to cmyk space (with imagemagick or gimp > separate pluggin, with icc profile), the result is that > CMYK-to-RGB-to-CMYK ever change the original values, specially the > cmyk colors with zero value in any C M or Y, and high K: in this > case > > CMYK:100/60/0/40 to RGB:10/40/97 to CMYK:100/76/29/16 > V V > V V > CMYK:100/60/0/0 to RGB:33/66/148 to CMYK:99/60/4/0 > > its really differents gradients and colors! > > the solution: implementing a *export to cmyk bitmap* feature! :) > > Scribus is the only mature vectorial software where a designer can > draw any vectorial art whit colors and gradients in CMYK values > (and thinking in the offset machine!), and if is there any problem > with the pdf format in the filming provider, as far as I was, no > other method to export the artwork! I think that is an important > issue > > my actual solution: export to cmyk pdf and use ghostscript to > generate a cmyk separation to tiff device: > > gs -dBATCH -dNOPAUSE -sDEVICE=tiffsep -dDOINTERPOLATE > -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -sOutputFile=output.tif > -r120 -MaxSeparations=8 example.pdf > > (seen on this page: http://wiki.contextgarden.net/Colors I have no > idea about ghostcript!) > > this gs command generate output.tif and four c,M,Y,K grayscale > outputs tifs, work fine with > > and I can re-import the cmyk tif to scribus artwork > > this excentric export to cmyk tiff is very usefull to my, thanks! > > saludos! sorry my bad english > > _______________________________________________ > scribus mailing list > scribus at lists.scribus.info > http://lists.scribus.info/mailman/listinfo/scribus
The tools in ImageMagick can be helpful here, specifically the convert command. -- John Culleton Resources for every author and publisher: http://wexfordpress.com/tex/shortlist.pdf http://wexfordpress.com/tex/packagers.pdf http://www.creativemindspress.com/newbiefaq.htm http://www.gropenassoc.com/TopLevelPages/reference%20desk.htm
