[sane-devel] Scanning Lineart/Halftone with MICROTEK Scanmak
Joachim Backes
Joachim Backes <backes@rhrk.uni-kl.de>
Mon, 06 May 2002 09:45:18 +0200 (CEST)
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@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@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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> >
> >
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