[sane-devel] Scanning Lineart/Halftone with MICROTEK Scanmak

[Joachim Backes]

On 06-May-2002 Karsten Festag wrote: 
>  Hi Joachim,
>  
>  I will investigate this, but as I have no time in the moment it will be
>  not before next week.
>  
>  Does the same problems occur with xscanimage?

Hi, Karsten,

using xscanimage:

1. When using pre-view with xscanimage, then the dashed preview rectangle
   totally misses after prescan. I have to draw it myself.

2. The shake-effect together with xscanimage using lineart or halftone
   is heavily reduced (there is a little effect: letters have a small
   black-pixeled wreath which lets letters to be blurred).
   No problem when scanning in gray or colored mode.

Regards

Joachim Backes

--

Joachim Backes <backes at rhrk.uni-kl.de>       | Univ. of Kaiserslautern
Computer Center, High Performance Computing  | Phone: +49-631-205-2438 
D-67653 Kaiserslautern, PO Box 3049, Germany | Fax:   +49-631-205-3056 
---------------------------------------------+------------------------
WWW: http://hlrwm.rhrk.uni-kl.de/home/staff/backes.html  


>  
>  regards,
>  
>  Karsten
>  
>  Joachim Backes schrieb:
> > Hi,
> > 
> > having problems with Microtek ScanMaker 96000 xl.
> > 
> > Environment: Linux RedHat 7.2
> >              Kernel 2.4.18
> >              xsane-0.86
> >              sane-front/backend-1.0.7
> > 
> > 1. The preview: When previewing a A4 Page with normal 
> > text on my ScanMaker 9600xl 
> >    (A3 scanner), then after previewing, the dashed frame 
> > painted around the read 
> >    page is not correct: horizontally, the frame correctly 
> > stops at the right margin 
> >    of the A$ page, but the lower margin does not stop at 
> > the bottom of the A4 page, 
> >    but at the bottom of the Scanners A3 pane. That means, 
> > the preview frame contains 
> >    the rectangle u,v,w,x and not u,v,y,z
> > 
> > 
> >    u                         v 
> >    +-------------------------+---------------+
> >    |                         |               |
> >    |                         |               |  A3 Pane
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |       A4 sheet          |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    |                         |               |
> >    +-------------------------+               |
> >    |y                        z               |
> >    |                         .               |
> >    |                         .               |
> >    |                         .               |
> >    |                         .               |
> >    |                         .               |
> >    |                         .               |
> >    +-------------------------+---------------+
> >    w                          x
> > 
> > 2. Having problems when scanning in LineArt or Halftone 
> > mode: in the scan, 
> >    a lot of horizontal pixel lines are shifted against 
> > each other, so you have a 
> >    "shaked" not readable picture.
> > 
> >    Scanning in Grayscale/Color mode is OK.
> > 
> > Regards  
> > 
> > Joachim Backes
> > 
> > --
> > 
> > Joachim Backes <backes at rhrk.uni-kl.de>       | Univ. of 
> > Kaiserslautern 
> > Computer Center, High Performance Computing  | Phone: 
> > +49-631-205-2438  
> > D-67653 Kaiserslautern, PO Box 3049, Germany | Fax:   
> > +49-631-205-3056  
> > ---------------------------------------------+----------
> > -------------- 
> > WWW: http://hlrwm.rhrk.uni-kl.de/home/staff/backes.html  
> > 
> > 
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> > Sane-devel at www.mostang.com
> > http://www.mostang.com/mailman/listinfo/sane-devel
> > 
> >
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