"Belgabor" <[email protected]> wrote: > I also have to thank for this patch (it came on the day I boght the scanner > without knowing about the issues). It is almost perfect as it works nice for > resolutions up to 1200 dpi. At 2400 and 3200 I get a combing effect. Every > other pixel column is offset by several pixels. It looks a bit like an > interlaced PAL TV picture (only the combing is vertical rather than > horizontal). > Hints appreciated (also if someone could confirm this. The error isn't there > in windoze, so it doesn't seem to be a hardware problem).
The backend needs to perform line distance correction on the image as for the 2480/2580 and an increasing number of scanners. The high resolution are obtained by combining the data from 2 slightly offset sensors (lower resolution, cheaper), hence the offset you see. JB. -- Julien BLACHE <http://www.jblache.org> <[email protected]> GPG KeyID 0xF5D65169
