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

[stef]

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

Regards,
	Stef