Hi All, I've been playing with the settings for quite a while and the scanning results are still not good enough.
I was using Xsane 0.996 under Ubuntu 9.10 to scane blank writing pad paper with rule-lines. Note the paper is white and has no ink at all, except those rule-lines. When I scanned this kind of paper, the result image is always too bright to see the rule-lines (which are my concerns). Case1: true-gray model, 600dpi, gamma = 0.3 (minumun), brightness = -100(minumun), contrast = 100(maximum), I get a result with partial visible rule-lines, but the quality in general is not good. I tried to modify the threshold parameters in the Preference->setup->enhancement, but no luck -- maybe I can't fully understand those threshold minimum(0), maximum(20), multiplier(12.5). Anybody can help? Case2: Black&White, 600dpi, It didn't matter what gamma, birghtness, etc were, the results were almost always a white image -- no rule lines are visible at all. Note that if I scanned it in a color model, I can see the rule-lines easily. However, I don't want to do the follow-up converting work; I want everything that comes out of the scanner to be original and raw. If possible, I'd like to scanned in both gray model and BW model respectively, and at the same time make the rule-lines as clear as possible. If anybody has done this before or have any ideas how to play with those parameters, I'd be more than happy to hear. I appreciate your help! Sincerely, Jin Chen -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.alioth.debian.org/pipermail/sane-devel/attachments/20100125/950c58a3/attachment.htm>
