On Saturday 10 February 2007 18:17, Todd Pytel wrote: > Hello, > > I just received a Canon LIDE 25 and am hitting some problems with false > colors. I've basically never used a scanner before, much less on Linux > (though I'm pretty handy with Linux in general), so I'm not sure what > component of the scanning system I should be looking at. > > I set up the scanner without any issues - it's using libusb and > scanimage detects the make and model correctly, as well as identifying > the plustek backend. I've got xsane running fine as a regular user and > can preview and scan to an image. Full-color documents (like a map, for > example) seem to scan OK. The problem document is primarily > black-and-white text and line graphics (boxes and such), with a few red > numbers and graphics that I'd like to keep in color. When I scan this, I > get a lot of false color in parts that should be black - for example, a > solid black line that's part of a box will show up with a kind of > spectrum effect. I tried fiddling with a couple of the xsane settings, > but didn't come across anything helpful.
It might help, that you play with scanresolution. I'm pretty sure that you hit a common "scanning" problem, called "Moir? pattern" - see http://en.wikipedia.org/wiki/Moire As already set, you may play around with the resolution. HTH Gerhard
