[sane-devel] Plustek ST24 - genesys...

[Gerhard Jaeger]

On Monday 25 February 2008 16:25:24 stef wrote:
> Le Monday 25 February 2008 07:58:49 Gerhard Jaeger, vous avez écrit :
> > Hi list, hi Pierre,
> >
> > I revived my Plustek ST24 device and tried to make it work
> > with the genesys backend. I managed to get out some picture, BUT:
> >
> > - any resolution != 150dpi results in a picture, that has double
> >   the height of the original
> > - the "focus" is not given, which means that it seems there's a
> >   slight shift between the color planes
> >
> > my question is: could you simply give me some pointers where to
> > look? Which are the parameters in the set to tweek, for fixing
> > these issues?
> >
> > TIA
> > Gerhard
> 
> Hello,
> 
> for the double height, you may have to play with REG02_HALFSTEP in register 
> index 0x02 (genesys_gl646.c) .
> 
> for the color issue, I think you may have to tweak the 0, 8, 16 triplet that 
> gives CCD Line-distance correction in pixel in the the plustek_st24_model 
> entry in genesys_devices.c .
> 
> I started some doc about the backend and some hint on how to improve it at
> http://stef.dev.free.fr/sane/genesys/index.html

Thanks for the pointers, I'll give 'em a try.
- Gerhard