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Scribus => Raster and Vector Graphics => Topic started by: albert0346 on November 01, 2012, 10:04:37 PM

Title: Strange behavior with a PNG-Image
Post by: albert0346 on November 01, 2012, 10:04:37 PM
Hi,

I recognized a strange behavior with one of my PNG-Images:

I downloaded this image from my website with the function in the context menu and imported it then into an image frame. The image is 300 x 197 px, 96dpi. On my windows XP SP3 system it displays with the proper size, as on the Web. But on my Windows 7 system it has suddenly a resolution of 400dpi and therefore is way too small. How can a change to 400dpi can happen?

Could someone help me with this strange behavior? Your help is very appreciated.

Albert
Title: Re: Strange behavior with a PNG-Image
Post by: Nermander on November 02, 2012, 07:34:15 AM
The DPI is just a number calculated from the number och pixels and the physical size.

See the explanations in this topic http://forums.scribus.net/index.php/topic,112.0.html

So, as long as the image has the same number of pixels, just resize it and the DPI will change.
Title: Re: Strange behavior with a PNG-Image
Post by: albert0346 on November 02, 2012, 09:36:28 AM
But when I resize it to the wanted size the image got blurred.

Albert
Title: Re: Strange behavior with a PNG-Image
Post by: Nermander on November 02, 2012, 11:37:03 AM
In the PDF or in the screen preview? Scribus has a separate setting for the preview resolution.

If the image is 300 x 197 px it should still be 300 x 197 px no matter what version of Scribus you import it to, because Scribus does not embed images, it only links to them (just lika an IMG tag in a HTML document would do).
Title: Re: Strange behavior with a PNG-Image
Post by: albert0346 on November 02, 2012, 07:38:49 PM
As I mentioned in my first post, the behavior is different on both systems, and that's so strange.

When I change the size in the property window then the image got blurred.

Albert