[sane-devel] re : problem in avision scanner

[priya]

Hi ,


 Does the scanner work ok otherwise? I'm asking because it's labeled > "untested" in our lists.

Ya the scanner avision 830C which i m using works fine with windows.


Which backend version are you using?

The backend version which i m using is 1.0.12, which i think is the latest one.



The backend does provide the setting for brightness and i m giving the brightness as 50. Also i tried to test with gamma table, the documentation says that if u give gamma-table = (yes) then it will use the default gamma table. i tried this option but when i give this option then the result was a 0bytes file. That is the scanning didnt worked at all. But i can surely try to generate a gamma table and then try using it. 


The command i m using for scanning is 
scanimage --brightness 50 --mode grayscale --format Tiff > abc.tiff



I have one more doubt :

I have 4 versions of Avision scanners, they are :

1. Avision 8000S
2. Avision 3200C
3. Avision 600U
4. Avision 820C


No where in the documentation i can found that I can use ADF of these scanners. Is there any way that i can use the ADF for these scanners????


Regards,
Priya



-----------------------------------------------


Hi,

On: Tue, 1 Jul 2003 20:14:57 +0200,
    Henning Meier-Geinitz <henning at meier-geinitz.de> wrote:
> Hi,
> =

> On Tue, Jul 01, 2003 at 08:44:00PM +0530, priya wrote:
> > I m using avision 830C scanner on linux.
> =

> Does the scanner work ok otherwise? I'm asking because it's labeled
> "untested" in our lists.

Which backend version are you using - I once had such a "wrong scaling
of calibration data" but for some scanner revisions.

Please update to the latest SANE version.

Could you also send me a log (in private) containing the log file of:

SANE_DEBUG_AVISION=3D7 scanimage -L 2> log

?

> > When i open the scanned image after scanning in GIMP it is very dar=
k.
> > I dont know how to rectify this.  I m using scanimage command to sc=
an
> > the document. =

> =

> XSane and other graphical frontends provide an easy way to change
> brightness and gamma settings. If you want to keep using scanimage,
> check if the avision backend provides an option like "brightness" in
> the mode you use: scanimage -L. If it doesn't, but has an option
> called "gamma-table" you can use that one. To generate the gamma
> table, the program "gamma4scanimage" may be helpful.

The backend supports both - but I guess he is running a version with
broken calibration. I'm currently working on the calibration stuff in
this minute anyway because I noticed myself that it has endian issues
on big-endian architectures (e.g. PowerPC, SPARC).

> Bye,
>   Henning

Sincerely yours,
  Ren=E9 Rebe
    - ROCK Linux stable release maintainer

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