PNG claims "lossless" compression. The question is: Is that relevant?
If, say you scan at 600 DPI, and use a high-enough-quality JPG
compression, I would expect that you can get better quality at
less-bits-on-disk.
I did a quick smoke test to test that kind of hypothesis: how well does
tess
One situation I encountered: I got terrible OCR results when I scanned
at 600dpi, great results on the same pages scanned at 300dpi. They were
clean pages, though, so I didn't have to do any cleaning.
Once I had the impression that some OCRs don't believe letters can be
this big [measured in pix
Am 21.02.2018 um 16:39 schrieb Gunter Königsmann:
Normally if you set the white level low enough that the paper is "white"
and the black level high enough that the letters are completely black
and if you set the scan to 1 bit color depth and tell scantailor to
suppress all speckles that are les
On 02/21/2018 06:39 PM, Gunter Königsmann wrote:
Am 22.02.2018 um 05:04 schrieb David W. Jones:
One situation I encountered: I got terrible OCR results when I scanned
at 600dpi, great results on the same pages scanned at 300dpi. They were
clean pages, though, so I didn't have to do any cleaning
Am 22.02.2018 um 05:04 schrieb David W. Jones:
> One situation I encountered: I got terrible OCR results when I scanned
> at 600dpi, great results on the same pages scanned at 300dpi. They were
> clean pages, though, so I didn't have to do any cleaning.
>
Once I had the impression that some OCR
One situation I encountered: I got terrible OCR results when I scanned at
600dpi, great results on the same pages scanned at 300dpi. They were clean
pages, though, so I didn't have to do any cleaning.
On February 21, 2018 4:53:17 PM HST, John Muccigrosso
wrote:
>Of course it depends on what ki
Normally if you set the white level low enough that the paper is "white"
and the black level high enough that the letters are completely black and
if you set the scan to 1 bit color depth and tell scantailor to suppress
all speckles that are less than 4 pixels wide png compression should result
in
On Tue, Feb 20, 2018 at 09:32:52AM -0800, T. Modes wrote:
> Am Dienstag, 20. Februar 2018 17:57:08 UTC+1 schrieb Toolforger:
> > Ah, the joys of too much editing.
> > I tested with PNG and found that 300 dpi with the right settings are small
> > enough. TIFF with one of its compression modes may
Toolforger wrote:
Scantailor assumes a single image of each page.
I need a way to have multiple images for each page to average out speckles and
noise.
If there are speckles on the page, averaging won't get rid of them.
If there is noise in the scan, using a longer exposure will most likely
e
The problem is that hugin defaults to only blend between images where
necessary and to try to blend in places this doesn't tend to produce visual
artefacts, for example at sharp edges. There are many options, though.
Perhaps trying to make an HDR image is what you wanna do, kind of...
Am 18.02.201
git://g...@github.com:mpetroff/stitch-scanned-images.git combines many
small scanned images to a large one. But it does blend from one image to
the other, not average over them.
I have no experience if that would be possible, as well...
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