On Wednesday 25 July 2007 16:19:32 Richard Reina wrote: > Rene, > > Thanks for the quick reply. My printer is a Samsung ML-2550. I am printing > to it via $:lpr ducument.tiff. I have tried to attach a sample document but > it gets rejected by the list moderator. The documents are shipping documents > that are often on thin pre printed forms like carbon copys but often are > carbonless -- if that makes sense. Here a link that shows some:
Hm - so a b/w laser printer. Maybe the printout is rathered and due to a background color contains dithering dots all over the printout? Maybe send me a original scan and a scan of a printout to just my private address. > http://www.ncrforms.com/home.php?xid=ab66d64884c5a7342c7641bec2ec6bb0 > > Ren? Rebe <rene at exactcode.de> wrote: On Wednesday 25 July 2007 15:10:08 > Richard Reina wrote: > > Rene, > > > > Since dropping the "mode --Dithered" from my scanimage command the quality > > has improved somewhat. However, when I print the document it does not look > > anywhere near as good as it did when viewed with $:display document.tiff. > > Will optimize2bw help this? Or do I have a printing quality issue? > > > > Thanks for the help thus far. > > As with all technical systems the devil is in the details. And espeially with > all > the different color scanning and also printing techniques - including > different > materials. > > The questions is what kind of techniques your printer does utilize, which > printer is it by the way? > > If the document looks good no the screen and totally different when printed > out then you more likely have some problem in your print queue. > > However with many print spoolers and rasterizers (including printer > firmware rasterizers) it also depends how the PostScript/PDf is generated > as there several different methods to embed image raster data in those > files and most spoolers and firmware handle them differently. > > If you expect this free and open source scanner related list to help you > out you certainly need to drop some more details what printer you use > and what you try to archive. > > Optimize2bw is an automatic thresholding application doing some > sharpening and background color removal on the image and trying > to preserve as much detail as possible to create 1bit b/w image for > archival. > > Yours, > > > Ren? Rebe wrote: On Tuesday 24 July 2007 18:29:12 Richard Reina wrote: > > > I have an Avision AV210 that I use to scan in documents with the > > > scanimage command: > > > > > > scanimage --mode Dithered --resolution 200 --format tiff > file_name > > > > > > Can anyone recommend syntax to darken the document it and make it more > > > clear? > > > > All color tuning, including brightness, contrast and gamma also work in the > > Dithered mode (in the Avision backend). Btw. Why do you use dithered at all? > > > > If you want automatic thresholding you can scan in Gray (or Color) and use > > optimize2bw from ExactImage: > > > > http://www.exactcode.de/site/open_source/exactimage/econvert/ > > http://www.exactcode.de/site/open_source/exactimage/utilities/ > > > > Yours, > > > > -- > > Ren? Rebe - ExactCODE GmbH - Europe, Germany, Berlin > > Gesch?ftsf?hrer: Susanne Klaus, Ren? Rebe > > Sitz: Berlin, Amtsgericht Charlottenburg HRB 105 123 B > > USt-IdNr.: DE251602478 > > http://exactcode.de | http://t2-project.org | http://rene.rebe.name > > > > > > -- > Ren? Rebe - ExactCODE GmbH - Europe, Germany, Berlin > Gesch?ftsf?hrer: Susanne Klaus, Ren? Rebe > Sitz: Berlin, Amtsgericht Charlottenburg HRB 105 123 B > USt-IdNr.: DE251602478 > http://exactcode.de | http://t2-project.org | http://rene.rebe.name > -- Ren? Rebe - ExactCODE GmbH - Europe, Germany, Berlin Gesch?ftsf?hrer: Susanne Klaus, Ren? Rebe Sitz: Berlin, Amtsgericht Charlottenburg HRB 105 123 B USt-IdNr.: DE251602478 http://exactcode.de | http://t2-project.org | http://rene.rebe.name
