Joachim Backes wrote: > > Hi, Karsten, > > On 16-May-2002 Karsten Festag wrote: > > Hi Joachim, > > > > the function that finds the scanning area and calculates the > > dashed rectangle is included only in xsane if I'm not wrong. > > That's why in xscanimage you have to draw the scanning area > > by hand. I don't know the way xsane calculates the scanning > > area but it might be an issue of the contrast between the > > sheet of paper and the background of your scanner lid. Maybe > > a black paper as background does the trick? > > The cover of the scanner IS black!
Hmm, in this case the black paper probably won't help ;-) Anyway, I think Oliver Rauch should make a statement if it could be a xsane problem. I think it isn't backend-related because the preview-image seems to be correct. > > > > > There were some reports of garbled xsane lineart scans > > earlier, perhaps Oliver Rauch knows something about this? > > I tested this with my scanner: If you scan into a file or > > for a fax or for photocopy then the pictures are o.k. as > > well as the preview. Only the viewer makes problems. Is this > > the same at you? > > Almost. Additionally, when scanning into the viewer, not only > the viewer picture itself is blurred or shaked, but the file's > contents too when saving the picture to some file. Same as above - looks like an xsane issue only for the xsane viewer mode. Oliver, do you agree? Karsten > > Regards > > Joachim Backes > > -- > > Joachim Backes <[email protected]> | 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 wrote: > > > > > > 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 <[email protected]> | 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 <[email protected]> | 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 > > > > >
