[sane-devel] Backend for plustek Opticbook 3600

[stef]

Le lundi 22 février 2010 15:09:11, vous avez écrit :
> On 02/22/2010 06:43 AM, stef wrote:
> > Le lundi 22 février 2010 02:09:14 Chris Berry, vous avez écrit :
...
> 
> Hey Stef,
> 
> Thanks for the awk script, helped a lot. I put the values into a
> spreadsheet and got gamma values all around 1.0 so I didnt really need
> to alter them at all, but it gives me something to talk about in my
> report :). I have tweaked the gain and offset (offset is largely ignored
> for AD type frontend it seems so I added a similar AD_OFFSET_CALIB
> function to gl841) and now the picture seems right with the original
> shading issues.
> 
> So now I need to alter the shading as the shading files are still
> showing really odd things. How do I adjust these? I imagine I need to
> find the calibration area in some way but im not sure how I do this?
> 
> After the shading is corrected I think I should be ready to test, is
> there any formal testing procedure with SANE? There are a couple of
> people who are awaiting this scanner backend and have agreed to help
> testing so I will get it to them in some way. Im also going to sort my
> patch out and get rid of any whitespace or other rubbish ;)
> 
> Cheers
> 
> Chris
> 
	Hello,

	The shading calibration area is 'under the roof', it is located inside the 
scanner. You can have a picture of it by doing a scan after setting physical y 
offset to 0. ie you scan from parking position.

	The tools you have to test a backend are scanimage -T and tstbackend. I also 
run scanimage/xsane through valgrind from time to time to fix memory handling 
problems.

Regards,
	Stef