[sane-devel] Backend for plustek Opticbook 3600

stef stef.dev at free.fr
Tue Mar 23 04:52:21 UTC 2010

Le lundi 22 mars 2010 22:14:11 Chris Berry, vous avez écrit :
> stef wrote:
> > Le lundi 22 mars 2010 07:26:23 Chris Berry, vous avez écrit :
> >> Hi guys, I have included a patch for the plustek 3600. It isnt quite
> >> there yet but at least you can apply it to the current development
> >> version and should be able to test (for those of you with the scanner)
> >> to see how it goes at this stage.
> >>
> >> I have also included Pierre and Stef on this if they would like to have
> >> a look at the revisions i have made in order to add support for this
> >> scanner.
> >>
> >> Thanks for your help with this project
> >>
> >> Chris
> >
> > 	Hello,
> >
> > 	it'll take me some days to review correctly. I'll let you know by the
> > end of this week.
> >
> > Regards,
> > 	Stef
> Cheers Stef, I tried scanning at 600dpi (which is highest available on
> plustek application) so I thought that was full sensor resolution and it
> resulted in no difference of the strange colours. I entered a custom
> size into the windows version of the driver (tried 1200dpi and 2400dpi)
> and both work but im not sure if that is hardware or software
> interpolated so I dunno what the max resolution is for this. I tried
> 1200 dpi with the sane driver and got a half image (like it needs half
> ccd but it is enabled).  Either way I have made no head way with
> correcting the shading.
> Any ideas what im doing wrong?
> Thanks
> Chris

	I think that after reviewing your patch I'll have some ideas to suggest to 
get shading working.
	USB logs will tell you what is the maximum sensor resolution. Check the value  
DPIHW bits of register 05. Maximum motor resolution is often higher than the 
CCD one, the genesys backend is able to cope (by interpolation) with an y 
resolution that is the double of the x resolution. 


More information about the sane-devel mailing list