[sane-devel] Epson 3490

[Bjorn Solberg]

Levente Novák writes:

> On Thu, 2005-09-01 at 00:54 -0700, Bjorn Solberg wrote:
>> > Another thing that I'm interested in is whether only the size of the 
>> > scan area is wrong or if the origins of the scan area are also not 
>> > set correctly (i.e. options -l and -t in scanimage)
>> 
>> -x and -y are reduced by about 25% - i.e. I ask for 100mm and get only
>> 75mm.
>> 
>> -l and -t are ditto reduced by about 25% - getting only 75mm when asking
>> for 100mm.
>> 
>> > If it is always the same ratio of real distance to scanned distance 
>> > (also for -l and -t) it is most likely that the calculation of the 
>> > scan area is not handled correctly. That could be corrected by 
>> > changing the value of pos_factor in function set_window() in 
>> > snapscan-scsi.c. 

> AFAIK the Epson is a 3200 dpi scanner while e.g. 2480 is only 2400 dpi.
> 2400/3200=0.75.

> Couldn't be this the problem?

Duh.

So maybe it's just a matter of finding the part of the code that governs
this and set up a separate configuration for the 3490.

Yet another issue is that scanimage seems to hang if I try to scan with
resolutions over 1200 - could that be related?

Bjorn.