27 Nov
2019
27 Nov
'19
7:01 p.m.
On Wed, Nov 27, 2019 at 2:01 PM Paul Koning <paulkoning at 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.