[Scribus] PDF in Image Frame and DPI

[Gregory Pittman]

Helge Hielscher wrote:
> Hello Gregory Pittman,
>
> thanks a lot you for your answers.
>
> On Sun, 27 Aug 2006 23:09:43 -0400, Gregory Pittman wrote:
>
>   
>> Helge Hielscher wrote:
>>     
>>> where does one change the DPI of PDF-files that get imported via "Get
>>> Image..."? Here it defaults to 72dpi without an obvious way to change
>>> the resolution. Am I missing a preference somewhere?
>>>   
>>>       
>> Imported PDFs or other images are displayed within Scribus as a
>> convenience and not (necessarily) at the final resolution. The default for
>> images of any kind is to be imported to "full size" -- change the scaling
>> in Properties > Image tab, where it shows the DPI as you do this.
>>     
>
> If I change the dpi value in the properties the PDF-image gets resized,
> that does not make sense.
>   
In order for Scribus to work with a PDF as input, it will rasterize the 
PDF, in essence turn it into a bitmap, so the full size you see when you 
first import is 72dpi. So, like any bitmap, the only way to increase DPI 
is to shrink the size. If you import a page of a PDF into a page-sized 
frame, then export to PDF, you are likely to be disappointed at the loss 
of resolution.
>   
>> Output DPI is set in the PDF export requestor.
>>     
>
> Oh, thank you. So that means I have to resample all images in the
> document, right? Unfortunately ghostscript takes to much memory
> when it converts the PDF, but already at 500 dpi the fonts are rendered
> with much more detail.
>
>   
You probably don't need 500dpi for most things -- scale back for 
something your memory can handle.
>> Display resolution can be
>> set in File > Preferences > Tools > Image.
>>     
>
> Are you refering to "On screen preview"? That is the same as the "preview
> settings" in the context menu. What does low/normal/full resolution stand
> for?
I don't know precisely, but this is simply the display that you see and 
manipulate. Full resolution is going to add to screen refresh times.

Greg