Hello Karl,
Karl Berry wrote:
I tried playing with the --thresheld, but the results will not
noticeably better. Are there other options or approaches which might help?
The image is not only not-very-cleanly scanned, it is also not-very-well
printed. I guess it was printed with a real teletype. See the way a lot
of zeros are printed in this image:
· O O · · ·
O O O O O ·
· · · O O ·
· · · · O ·
· · · · O O
· · + · O O
· · · · O ·
· · · · O ·
· · · · O ·
O · · O O ·
· O O O · ·
The resolution of the scan is also too small. Ocrad needs a character
height of 20 pixels for a good result, but as you can see, the zero
above is only 11 pixels high. Using --scale=2 improves the result, but
not much.
I think ocrad can't extract anything useful from this image. I think it
will be difficult even for a human to retype it without errors.
Best regards,
Antonio.
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