On Sat, 01 Jul 2017 18:06:50 +0200 "Dr.-Ing. Dieter Jurzitza" <[email protected]> wrote: > Dear listmembers, > maybe I am on the wrong list because my problem might be application - > specific, however. >
I've sent several messages like this one before, and normally you send a meaningful subject and then apologize, that way people learn of what you're asking before dismissing it because you're too busy apologzing to tell people what you need. > I have set up a HP 7400C scanner, supported by the avision backend, it > is detected and working. So far, so good. > > Now, if I scan a black and white printed text with xsane and adjust all > parameters to default, 300dpi, Gray, contrast and brightness set to 0, > (=100%), the resutls are nice quality scans, black is black, background > is white. > > In contrast, attempting to do the very same with scanimage, calling: > > scanimage --mode Gray --contrast 0 --brightness 0 --resolution 300 > > outfile > > the resulting picture in "outfile" (same printed text as above) is very > bright, grey rather than black. Modifying brightness is making the > result worse, modifying contrast as well. I cannot achieve the same > result as with xsane - what makes me wonder as I had had expected to > work the same way .... > > Any ideas / hints for me? I could provide resulting scans for > explanation, however, I think I cannot upload anything. <snip> Use a post processing tool, like imagemgick, or gimp. You might also be interested in OCR. Sincerely, David -- sane-devel mailing list: [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
