On Mon, 10 Feb 2003 13:06:27 -0800 TomF <[email protected]> wrote: ... > > xsane worked, but also produced negative images. I was thrashing > around trying to get sane working before I found out about the patch, > and I may have changed something and forgot to record the change. > > It looks like I need a tutorial that describes how to pruduce plain > black and white images. Where could I find one?
I found http://www.xsane.org/doc/sane-xsane-doc.html and learned what line-art mode means. When I scanned in line-art, I got the positive black and white image that I wanted. However, the black/white threshold does not look right, and I could not find a way to adjust it. The doc file mentions enhancement options, but I could not find a way to set the options to make the threshold adjustable. I executed scanimage --help -d avision:/dev/scanner, but found no options which appear to be related to the black/white threshold. Is there any way to do this?
