Hi,
Glad to see that you and some other folks are working hard on the
snapscan backend.
I have similar problems to what is reported here. The scanner I have is
called
AcerScan (Prisa) 610ST It is a SCSI model with a built-in transparency
module.
My understanding is that the differences between models are something
like this:
8/24 bit 10/30bit 12/36bit 12/48bit
DPI ________________________________
300 | 300 310 320 340
600 | 600 610 620 640
I would also note that the Vendor ID string for my model is:
FlatbedScanner_4
This is odd because in the snapscan.h header file it seems to indicate
that
FlatbedScanner_4 is the vendor ID for the VUEGO310S.
The VUEGO610S should be FlatbedScanner_2.
Also, the Vuego and Prisa names seem odd. Perhaps this is a difference
between Agfa and Acer models, but my scanner is clearly marked Prisa,
even though it is 10-bit model.
I have installed sane-1.0.3 Redhat 7 rpms and source code, and also have
sane-1.0.1 sourcecode.
Any suggestions on what I can do to resolve these issues? I am trying to
make sense out this so we can have support for all of the snapscan
models instead of just a few. I will try to apply your patch today as
is, and see of it works. If not, maybe we can work out how to modify it
to cover 610s models as well as 310s models.
Thanks much,
John Craig
> Timo Hoderlein writes:
>
> > But when I try to scan color pictures, I only get final results of
> > pictures of the size of CD covers and the scanning works only up to a
> > resolution of 75 dpi. The result, though, is worthless because the parts
> > of the picture are disarranged and displaced and the colors are not like
> > the original and blurred. At a depth of 100 dpi and higher, the scanner
> > moves through the whole area, but the frontend does not receive RGB-data
> > ("no green status bar").
>
> I had the same problems with my scanner, but corrected them thanks to
> a few changes in snapscan. I made the same changes for your model
> (SNAPSCAN310) in this version of the backend:
>
> http://download.sourceforge.net/snapscan/snapscan-28102000.tar.gz
>
> You can read documentation on how to use this here:
>
> http://snapscan.sourceforge.net/
>
> If this doesn't work, could you please try:
>
> export SANE_DEBUG_SNAPSCAN=1
>
> before scanning to see which model is detected.
>
> If this works, please let me know so we can add it in snapscan.
>
> > possibility to scan with a resolution of more than 300 dpi.
>
> Your scanner probably can't go that high.
>
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