OCR missing out single Characters - why ?

[Bernhard Gramberg]

Hi, 

I make OCR from a special picture,

which is build out of several pictures 

I make separators in between to better pick up the real content  

In the middle, there is a single letter (in this example 5 + 7 ) 

which are not recogniced. (no differnz with letters as well) 

Its with Windows, version 3.5 and 4.0 as well , 

the short digit / letters (same problem) is not recognized 

Any idea, what to do, to have the 5 + 7 detected ? 

Yours Bernhard  

[ShreeDevi Kumar]

try with --psm 6

Here is the output I got - using english traineddata on 4.0 version (using gimagereader)

‘IO

EEEEE FFFFF DDDDD

7

EEEEE FFFFF DDDDD

5

EEEEE FFFFF DDDDD

12

EEEEE FFFFF DDDDD

—

EEEEE FFFFF DDDDD

—

EEEEE FFFFF DDDDD

Wlie viele verschiedene Plagen gab es in

Agypten, bevor Moses das israelische

Volk befreite (2, Buch Mose)?

EEEEE FFFFF DDDDD

​---------------

​tesseract ./screen-vertikal.png ./screen-vertikal  --oem 1 --psm 6 -l deu

Output file attached ​

​

[Bernhard Gramberg]

Hi, this helped me a lot. 

I tried a little, the importent parameter was --psm 6

 Page segmentation modes:

  0    Orientation and script detection (OSD) only.

  1    Automatic page segmentation with OSD.

  2    Automatic page segmentation, but no OSD, or OCR.

  3    Fully automatic page segmentation, but no OSD. (Default)

  4    Assume a single column of text of variable sizes.

  5    Assume a single uniform block of vertically aligned text.

  6    Assume a single uniform block of text.

  7    Treat the image as a single text line.

  8    Treat the image as a single word.

  9    Treat the image as a single word in a circle.

 10    Treat the image as a single character.

 11    Sparse text. Find as much text as possible in no particular order.

 12    Sparse text with OSD.

 13    Raw line. Treat the image as a single text line,

[Bernhard Gramberg]

I tested with other problems, 

now perfect working. 

Thanks again for the super fast answer.

Yours Bernhard from germany 
(actual in Teneriffa Kiting) 

Am Dienstag, 28. Februar 2017 17:11:32 UTC+1 schrieb Bernhard Gramberg: