On Monday 25 February 2008 16:25:24 stef wrote: > Le Monday 25 February 2008 07:58:49 Gerhard Jaeger, vous avez ?crit?: > > 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
