[Scribus] grayscale images imported as RGB?

[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 ...