[Scribus] how to import cmyk-picture

[Dominik]

On Thu, Feb 02, 2006 at 03:33:57PM +0100, Craig Bradney wrote:
> On Thursday 02 February 2006 15:26, Dominik wrote:
> > On Thu, Feb 02, 2006 at 03:08:39PM +0100, Craig Bradney wrote:
> > > On Thursday 02 February 2006 14:38, Dominik wrote:
> > > > On Thu, Feb 02, 2006 at 02:31:52PM +0100, Craig Bradney wrote:
> > > > > On Thursday 02 February 2006 14:19, Dominik wrote:
> > > > > > On Thu, Feb 02, 2006 at 02:04:18PM +0100, Craig Bradney wrote:
> > > > > > > On Thursday 02 February 2006 10:42, Dominik Holler wrote:
> > > > > > > > hi,
> > > > > > > > is there the possibility to import a cmyk-picture with
> > > > > > > > transparent background in scribus ?
> > > > > > >
> > > > > > > The problem relates to the 5 channels of data.. CMYKA. Tried PNG?
> > > > > > >
> > > > > > > Craig
> > > > > >
> > > > > > i worry about png does not does not suppert cmyk
> > > > >
> > > > > Yes, ok.. I read it as JPG and CMYK TIFF, not CMYK JPG and TIFF.
> > > >
> > > > i  am sorry
> > > >
> > > > > This is unfortunately an issue relating to the fact that the QImage
> > > > > class only knows about 4 channels.. RGBA or, as Scribus has also
> > > > > used, CMYK. We need a 5th one. I suspect we will move away from
> > > > > QImage soon enough though.
> > > >
> > > > thx for your reply
> > > > ok, scibus does nor work with cmykA at this time.
> > > > is it possible to import rgba and force converting to cmyka while
> > > > exporting to pdf ?
> > >
> > > Yes, export to printer destination (it will convert everything to CMYK).
> >
> > is this ,,export to pdf" using Color: Printer (not Screen) ?
> > i will have a closer look at the produced pdf ( this can take some time
> > ...) - but i worry the image is still rgb
> > or you want to say i have to ,,print'' in a file ?
> 
> Yes, export to PDF with colour setting printer (not screen).
> 
i am unsure to answer you back:
i exported to PDF/X3, so parameter of colorspace is forced to be
,,Printer", next i uncompress the pdf using pdftk:
somewhre in the pdf i detect the folowing lines:
...
88 0 obj
<</N 3
/Length 3144
>>
stream ....HLino..mntrRGB XYZ...sRGB IEC61966-2.1...
91 0 obj
<</Width 667
/BitsPerComponent 8
/Mask 90 0 R
/Height 453
/Intent /RelativeColorimetric
/Filter /DCTDecode
/Subtype /Image
/Length 33133
/ColorSpace [/ICCBased 88 0 R]
/Type /XObject
>>
stream
...

i guess obj 88 0 is the sRGB profile, and obj 91 0 is my
picture, and i guess the line 
/ColorSpace [/ICCBased 88 0 R]
means, that my picture is rgb

i am using scribus 1.3.2cvs - mayby this is my misstake ?

-- 
dominik.holler at gmx.net || PGP Key ID: FDEF2A0B