On Wed, Nov 27, 2019 at 2:01 PM Paul Koning <paulkon...@comcast.net> wrote:
> Another problem with bilevel scans is that, on some machines at least, they > can be very noisy. That's what I saw on the copier/scanner at the office. > For good scans I use gray scale scanning, with post-processing if desired to > convert to clean bilevel data, without all the noise. Not only does it make > looking at the material more pleasant, but it also makes the files much > smaller -- noise doesn't compress well. That's a good point. With my Fujitsu's TWAIN driver, I've got a choice of 2 or 3 scan algorithms, plus some sliders to tweak, and I get good b/w scans. With fewer options, a grey scan + post-processing (another vote for IrfanView's batch mode) is the way to go.
