Hi, On Tuesday 11 January 2005 05:41, Alvaro Figueiredo wrote: > Hi, all. > > I recently bought a Canon LIDA 20, a USB scanner. It readly worked > on my Linux 2.6 box, but its scan quality is really much worse than > Windows 98 driver's scan output. It is a dual boot box. > > I am scanning regular text documents, like the sample bellow. > > scanimage --resolution 300 --mode Binary -x 210mm -y 297mm > > The Windows output is almost perfect, like a photocopy. The sane's > output seems to have much less resolution and misses some portions > of text that is not black. I am using the same mode (lineart) and > resolution (300dpi) on Linux / sane and Windows. I can send both > outputs, if anyone request it (near 150k each, in PDF).
please send it to me. > I have no scanning experience, but I had tried almost all options of > scanimage without significative improvement. > > Am I missing something, here? Probably not. > > Follow some system information. > > scanimage --version > scanimage (sane-backends) 1.0.14; backend version 1.0.14 you might update to 1.0.15. > scanimage -L > device `plustek:libusb:001:004' is a Canon N670U/N676U/LiDE20 USB > flatbed scanner > > sane-find-scanner > found USB scanner (vendor=0x04a9 [Canon], product=0x220d [CanoScan], > chip=LM9832/3) at libusb:001:004 > Could you please to the scan again, enabling the debug output, and send me that too? export SANE_DEBUG_PLUSTEK=20 Ciao, Gerhard
