27 Nov
2019
27 Nov
'19
4:14 a.m.
From: Jay Jaeger
CCITT Group 4 lossless compression
That's very good indeed. I scan text pages in B+W at slightly less resolution
(engineering prints I do higher, they need it), but compressed they turn out
to be ~50KB per page, or less - for long documents (e.g. the DOS-11 System
Programmer's Manual), that produces a reasonably-sized file.
The software I have been using i[s] Irfanview.
That's what I use too; it has tons of useful features, including being able
to drive my single-sided page-feed scanner and being able to number the
even-sided pages correctly. The one I use for this is the 'batch mode'; I can
do the entire document into CCITT 4 in one operation.
Noel
27 Nov
27 Nov
5:27 a.m.
On Wed, 27 Nov 2019, Noel Chiappa via cctalk wrote:
For scanning software, I highly recommend VueScan:
https://www.hamrick.com/
There are Linux, Windows and Mac versions, and it supports thousands of
scanner models, including some very old ones. VueScan can also do CCITT G4
compression, and directly create PDF files. If you but the pro version,
updates are free. I've been using it for years.
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/
From: Jay
Jaeger
CCITT Group 4 lossless compression
That's very good indeed. I scan text pages in B+W at slightly less resolution
(engineering prints I do higher, they need it), but compressed they turn out
to be ~50KB per page, or less - for long documents (e.g. the DOS-11 System
Programmer's Manual), that produces a reasonably-sized file.
The software I have been using i[s] Irfanview.
That's what I use too; it has tons of useful features, including being able
to drive my single-sided page-feed scanner and being able to number the
even-sided pages correctly. The one I use for this is the 'batch mode'; I can
do the entire document into CCITT 4 in one operation. 
8:12 a.m.
On Wed, 27 Nov 2019, mloewen at cpumagic.scol.pa.us wrote:
On Wed, 27 Nov 2019, Noel Chiappa via cctalk wrote:
My recommendation: use a proper multi-function copier (the big copiers)
that can also scan to network. I currently use our big Konica-Minolta
bizhub 754. Although it'a b/w copier, it can also scan in color. This
machine scans a two-sided page without flipping the paper, resolution
600dpi, color/bw, and I scan to TIFF multipage images (sometimes I use
JPEG for color pages). No problems scanning a batch of A3 schematics ;-)
Then I use tumble (either directly on the generated .tif or after
tiffsplit and rearranging pages) and ocrmypdf to produce the PDF file.
I guess my setup is much faster than Al's ;-)))
Christian
That's what I use too; it has tons of useful
features, including being able
to drive my single-sided page-feed scanner and being able to number the
even-sided pages correctly. The one I use for this is the 'batch mode'; I
can
do the entire document into CCITT 4 in one operation.
For scanning software, I highly recommend VueScan:
https://www.hamrick.com/
There are Linux, Windows and Mac versions, and it supports thousands of
scanner models, including some very old ones. VueScan can also do CCITT G4
compression, and directly create PDF files. If you but the pro version,
updates are free. I've been using it for years. 
11:56 a.m.
On Wed, Nov 27, 2019 at 10:12 AM Christian Corti via cctalk
<cctalk at classiccmp.org> wrote:
My recommendation: use a proper multi-function copier
(the big copiers)
that can also scan to network. I currently use our big Konica-Minolta
bizhub 754. Although it'a b/w copier, it can also scan in color. This
These are great for cranking through big stacks of paper, but watch
out for the presets. Some (like the older Xerox I used to use at
work) would scan to "TIFF"...which was really a JPG-compressed image
in a TIFF wrapper. So even my 600dpi bilevel scans would have
compression artifacts.
All manufacturers are different, YMMV, etc. Just something I got
burned on and worth watching out for.
j
12:01 p.m.
On Nov 27, 2019, at 2:56 PM, Jason T via cctalk
<cctalk at classiccmp.org> wrote:
On Wed, Nov 27, 2019 at 10:12 AM Christian Corti via cctalk
<cctalk at classiccmp.org> 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.
paul
My recommendation: use a proper multi-function
copier (the big copiers)
that can also scan to network. I currently use our big Konica-Minolta
bizhub 754. Although it'a b/w copier, it can also scan in color. This
These are great for cranking through big stacks of paper, but watch
out for the presets. Some (like the older Xerox I used to use at
work) would scan to "TIFF"...which was really a JPG-compressed image
in a TIFF wrapper. So even my 600dpi bilevel scans would have
compression artifacts.
12:21 p.m.
On Wed, 27 Nov 2019, Paul Koning wrote:
You both are right, and I had to make the proper settings for getting
clean b/w TIFF files without noise in black parts, but it is possible. And
the bilevel TIFF files generated are G4 compressed.
Christian
On Nov 27,
2019, at 2:56 PM, Jason T via cctalk <cctalk at classiccmp.org> wrote:
On Wed, Nov 27, 2019 at 10:12 AM Christian Corti via cctalk
<cctalk at classiccmp.org> 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. My recommendation: use a proper multi-function
copier (the big copiers)
that can also scan to network. I currently use our big Konica-Minolta
bizhub 754. Although it'a b/w copier, it can also scan in color. This
These are great for cranking through big stacks of paper, but watch
out for the presets. Some (like the older Xerox I used to use at
work) would scan to "TIFF"...which was really a JPG-compressed image
in a TIFF wrapper. So even my 600dpi bilevel scans would have
compression artifacts.
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.
7:33 p.m.
My recommendation: use a proper multi-function copier
(the big copiers)
that can also scan to network. I currently use our big Konica-Minolta
I've got a Lexmark X646E full duplex printing/scanner. I'm still learning
how to use it at its max, but I believe I'll scan TONS of documents I have
stored home as soon as I learn how to PROPERLY do that.
Interesting machine. Very cheap, but with a very fast ADF duplex scanner. I
just need to learn all the adjusts and fix the ADF rollers.
Enviado do meu Tele-Movel
On Wed, Nov 27, 2019, 13:12 Christian Corti via cctalk <
cctalk at classiccmp.org> wrote:
On Wed, 27 Nov 2019, mloewen at cpumagic.scol.pa.us
wrote:
of
On Wed, 27 Nov 2019, Noel Chiappa via cctalk
wrote:
> That's what I use too; it has tons of useful features, including being
able
> to drive my single-sided page-feed scanner
and being able to number the
> even-sided pages correctly. The one I use for this is the 'batch mode';
I
can
do the entire document into CCITT 4 in one operation.
For scanning software, I highly recommend VueScan:
https://www.hamrick.com/
There are Linux, Windows and Mac versions, and it supports thousands scanner models, including some very old ones.
VueScan can also do CCITT
G4
compression, and directly create PDF files. If
you but the pro version,
updates are free. I've been using it for years.
My recommendation: use a proper multi-function copier (the big copiers)
that can also scan to network. I currently use our big Konica-Minolta
bizhub 754. Although it'a b/w copier, it can also scan in color. This
machine scans a two-sided page without flipping the paper, resolution
600dpi, color/bw, and I scan to TIFF multipage images (sometimes I use
JPEG for color pages). No problems scanning a batch of A3 schematics ;-)
Then I use tumble (either directly on the generated .tif or after
tiffsplit and rearranging pages) and ocrmypdf to produce the PDF file.
I guess my setup is much faster than Al's ;-)))
Christian
1619
days inactive
1620
days old
7 comments
6 participants
participants (6)
-
alexandre.tabajara＠gmail.com -
cc＠informatik.uni-stuttgart.de -
jnc＠mercury.lcs.mit.edu -
mloewen＠cpumagic.scol.pa.us -
paulkoning＠comcast.net -
silent700＠gmail.com