[scribus] pdf compression

[John Culleton]

On Friday 18 March 2011 12:41:04 Ron Carter wrote:
> Thank you both.
> Before the images went into Scribus, they were all cropped to the
> bone.  I'm puzzled by one thing (well, too many things to count,
> but only that that may be pertinent),  The Scribus image-info
> generally says original ppi 300, actual ppi 400+.  I scanned or
> Photoshopped everything to 300.  What does the 400+ mean?  I need
> 300. Do I have room to spare?
> Ron
>
> On Fri, Mar 18, 2011 at 12:03 PM, Gregory Pittman 
<gregp_ky at yahoo.com> wrote:
> > On 03/18/2011 11:17 AM, Ron Carter wrote:
> >> Not long ago there was a thread talking about how to reduce the
> >> size of a pdf.  I can't find it.
> >> Can someone tell me how?
> >
> > Hi Ron,
> >
> > This is probably the most famous method:
> >
> > http://wiki.scribus.net/canvas/Web_optimised_PDF
> >
> > but keep in mind that the bulk of the compression comes from
> > resampling images, so that you have only the part of an image
> > that you use, and have its resolution only as high as needed.
> >
> > In that vein, you can actually control the size of your PDF right
> > from Scribus:
> >
> > http://wiki.scribus.net/canvas/Image_DPI_and_Scaling,_and_Resulta
> >nt_File_Sizes
> >
> > If you especially focus on large image files, crop them down to
> > the part you actually use, and pick suitable DPI settings in PDF
> > Export, you may avoid this post-PDF optimization altogether.
> >
> > Greg
> >
> > _______________________________________________
> > scribus mailing list
> > scribus at lists.scribus.net
> > Use http://lists.scribus.net/mailman/listinfo/scribus to
> > unsubscribe or edit your options.
> > Scribus Forums are available at http://forums.scribus.net
> > Notice: mailing lists will be migrated to a new host soon.
> > There may be downtime. Please use forums if the list is not
> > available.
>
> _______________________________________________
> scribus mailing list
> scribus at lists.scribus.net
> Use http://lists.scribus.net/mailman/listinfo/scribus to
> unsubscribe or edit your options. Scribus Forums are available at
> http://forums.scribus.net
> Notice: mailing lists will be migrated to a new host soon.
> There may be downtime. Please use forums if the list is not
> available.

If you load a graphic into a graphic frame, and then fit the graphic 
to the frame, it may shrink a bit giving you more dots per inch.
If you load the same graphic into another frame, the fit the frame to 
the graphic, it should stay at 300 dpi but it may be a bit larger than 
you expected.
-- 
John Culleton
Create Book Covers with Scribus:
http://www.booklocker.com/books/4055.html