[Scribus] image resolution problem

Joel Mawhorter joel-lists-rw
Sat Apr 15 21:43:33 CEST 2006

Thanks for the emails so far. Unfortunately none of them has solved my problem.

I'll clarify a couple of things:

1. My problem has nothing to do with using PNG. The problem happens if I import the same file as a TIFF. Also the same problem occurs if I output to PDF (at 300 DPI).

2. I know how to tell the difference between a 300 DPI graphic and a 72 DPI graphic and I understand the difference in resolution of my monitor from other output devices.

The problem is that when I import a 300 DPI image (say for arguments sake 300 pixels x 300 pixels), it displays the correct size for 300 DPI (i.e. 1 inch x 1 inch) but it is downsampled to 72 DPI so that any output I do includes an image at 72 DPI. Certainly I'm not the only person having this problem! I have the latest stable version of Scribus on gentoo linux. 

This is all I have to do to reproduce this problem every time:
1. Create a new document with default settings.
2. Create a new picture frame.
3. Right click on the frame and choose "Get Picture"
4. Select the TIFF file containing my 300 DPI picture.
5. Then output to whatever I want (PNG, PDF) and the picture is downsampled to 72 DPI.

Am I missing something basic or is this a bug in Scribus?


On Sat, 15 Apr 2006 09:35:32 -0700
frank gaude' <tanzen at sbcglobal.net> wrote:

> Craig Bradney wrote:
> > On Saturday 15 April 2006 17:19, Gregory Pittman wrote:
> >   
> >> Joel Mawhorter wrote:
> >>     
> >>> Hi all,
> >>>
> >>> I'm having trouble using high resolution images with scribus and I can't
> >>> figure out what I need to do to get it to work. I create a new document
> >>> then insert a large 300 DPI PNG into the document without changing any
> >>> settings. When I right click on the image, and look at the "Info" option,
> >>> it reports the DPI as 300 and the size of the image on my page is correct
> >>> for that resolution. However, when I zoom in on the image, it is
> >>> pixelated.
> >>>       
> >> There is a limit to resolution display in Scribus which does not reflect
> >> the actual resolution if printed or made into a PDF.
> >>
> >>     
> >>>  Also, when I output the whole page to a 300 DPI PNG the picture is
> >>> output at ~72 DPI.
> >>>       
> >> PNGs are not a good choice for high resolution results.
> >>     
> >
> > Since when? I use them all the time at 300dpi and get wonderful results.
> >   
> >
> PNG is lossless compression so the image doesn't loose any detail from 
> the original. But, you still have to have enough pixels to handle big 
> images, e.g., if you have a 300 dpi, 300 pixel by 300 pixel image it 
> will show okay at one inch by one inch printed out. On the screen with 
> it will look okay at about five by five inches, screens being 72 or 96 
> dpi devices.
> Frank
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