[Scribus] grayscale images imported as RGB?

jon info
Mon Mar 12 23:00:44 CET 2007

>> Lila Pagola

I think scribus should (as most layout applications I know) use the  
provided colorspace of the
imported images or eps (think this is what you intended) and don't  
apply colorspaces different
from that. Colorspace conversion might be fine - but this IMO should  
be handled as a seprate feature.

Isn't it possible to set grayscale images to DeviceGray - RGB to  
DeviceRGB - CMYK to DeviceCMYK if
there is no profile provided, otherwise read out the appended profile  
and simply use it?
IMO image data shall never be processed nor converted anyway if not  
intended or needed.

That might not help you in your case, but if you know how would you  
like to add your wishes (if)
to the scribus wish list? (I don't know how to do this by myself)

For now according to what Vlada says tinting the image with the  
grayscale "effect" might lead to some
solution. But I don't think it will, because scribus' choice of  
profile stays the same: RGB-input.

Setting the image to CMYK does work for me. I don't know wich app you  
use but if you convert
your image to CMYK you should make sure you delete all data from the  
CMY channels and copy the original
K or Grayscale data only to K or try "maximum Black" conversion mode  
(before you import them)


Am 12.03.2007 um 12:54 schrieb Vladimir Savic:

> On Monday 12 March 2007 17:43:36 Terence Chan wrote:
>> Yes, I believe this is normal behaviour for scribus - why is this
>> a problem? So long as you apply the appropriate icc input and output
>> profiles the greyscale images should appear ok when printed and on
>> the screen.
>> Terence
> Hmmm...
> I was doing something obviously wrong here too (talking about  
> Scribus 1.3.3.x
> not 1.3.4cvs). "Appropriate profile" is a key point. No profile can  
> ensure
> grayscale RGB (picture in RGB color space but completely  
> constructed of r=g=b
> values pixels) picture to appear on K plate only when PDF gets  
> token to
> prepress office.
> Right approach would be to ask of user if imported picture is  
> composite
> grayscale picture or single color channel image. Fortunately, in  
> 1.3.4 there
> is a simple solution: image effects -> apply colorize image and  
> give that
> picture 'black' color colorization (Don't take further writing for  
> granted
> but I think choosing 0%C 0%M 0%Y 100%K "in-Screibus hand made"  
> color doesn't
> work correctly)
> Vlada
>> On Sun, 11 Mar 2007, Lila Pagola wrote:
>>> hi!
>>> I'm working with Scribus in a book, almost finished, because we  
>>> are in
>>> press with everything except cover.
>>> Preparing the cover design for pre-press (I don't if in english  
>>> it's said
>>> that way), I have found a rare behavoir of Scribus with grayscale  
>>> images:
>>> they are considered as RGB files, in any format I try to import them
>>> (PNG8, gif, tif). And If I import them as CMYK I have information  
>>> in the
>>> 4 channels when the image is just black.
>>> Somebody has experiencied something similar? Am I doing something  
>>> wrong?
>>> I did a quick search on the web and the list's archives and I  
>>> didn't find
>>> any report of this problem.
>>> Our project has a wiki when we are uploading the problems and  
>>> solutions
>>> we found, in spanish, sorry (and for my english sorry too)
>>> the url is http://nomade.liminar.com.ar/wakka.php?wakka=MaBI
>>> Thanks in advance for any clue ...
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