[sane-devel] Pixma driver for MG7550 produces stripes

[Martin]

Hi Rolf,

Thank you again for this clarification. I scanned the picture with the GIMP-
plugin, so there should not be any data loss. It seams that scangear improves 
the image automatically, so I will try to accomplish this with GIMP.

Cheers,
Martin

Am Dienstag, 18. August 2015, 22.50:02 schrieb Rolf Bensch:
> Hi Martin,
> 
> The backend isn't responsible for any artefacts, it handles the scanned
> data 1:1 to the saved image colour file. The Pixma backend only
> manipulates the images for grayscale and lineart (1 bit b/w) output formats.
> 
> OK, there is some loss with image compression algorithms. If you have
> trouble with this, you should select lossless image formats.
> 
> Maybe you should test different scan resolutions.
> 
> Hope this helps.
> 
> Cheers,
> Rolf
> 
> Am 18.08.2015 um 13:32 schrieb Martin:
> > I noticed diagonal stripes on some scanned pictures.
> > 
> > In order to verify that it is not on the picture but an artifact of sane
> > I scanned the same picture with Canon's scangear-progam on a
> > Windows-system. That picture does not have the stripes.
> > 
> > 
> > 
> > Please find the image scanned with xsane attached.
> > 
> > 
> > 
> > Cheers,
> > 
> > Martin