OCR Tool Not finding Tesseract language pack

[Daniel Lerch]

I upgraded tesseract to 3.02.02 per Islandora 7 requirements. It's installed to usr/local/bin/tesseract. I also sym linked it to /usr/bin. Oddly enough, Islandora 6 recognizes tesseract, but for whatever reason 7 does not. I also tried adding environment variables and changing permissions on the language file to no avail (yeah I got desperate). Tesseract also works fine on the command line. Screenshots attached. BTW - I'm using the stable version of islandora 7. 

[Kevin S. Clarke]

Is it possible you have the newer tesseract version installed at /usr/local/share/tessdata and the older version at /usr/local/bin/ ?

Do you get anything when you type: /usr/local/share/tessdata/tesseract -v (you could also try to configure that path in the Islandora interface seen in the image with the white background).

Kevin

On Mon, Sep 9, 2013 at 3:48 PM, Daniel Lerch <dan....@gmail.com> wrote:

I upgraded tesseract to 3.02.02 per Islandora 7 requirements. It's installed to usr/local/bin/tesseract. I also sym linked it to /usr/bin. Oddly enough, Islandora 6 recognizes tesseract, but for whatever reason 7 does not. I also tried adding environment variables and changing permissions on the language file to no avail (yeah I got desperate). Tesseract also works fine on the command line. Screenshots attached. BTW - I'm using the stable version of islandora 7. 

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[Gervais de Montbrun]

Hey Daniel,

What's the output when you do "which tesseract" on the command line? What about "tesseract --list-langs" ?

What OS are you running this on? 

What do you mean by "the stable version of islandora 7"?

-> If you mean, 7.x-1.1, I'd try moving up to more recent versions (from github).

Cheers,
Gervais

On 2013-09-09, at 4:48 PM, Daniel Lerch <dan....@gmail.com> wrote:

I upgraded tesseract to 3.02.02 per Islandora 7 requirements. It's installed to usr/local/bin/tesseract. I also sym linked it to /usr/bin. Oddly enough, Islandora 6 recognizes tesseract, but for whatever reason 7 does not. I also tried adding environment variables and changing permissions on the language file to no avail (yeah I got desperate). Tesseract also works fine on the command line. Screenshots attached. BTW - I'm using the stable version of islandora 7. 

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<tesseract_command_line.jpg><ocr_config.jpg>

[Daniel Lerch]

Fixed. The issue turned out to be permissions on the language pack files. They needed to be set to 755. By default when extracted they were 644. I thought I had done this before but apparently not. 

[Chen Conan]

I still have the same problem for Chinese Simplified language pack on unbuntu 12.04

1.  Follow the instructions to install tesseract, http://miphol.com/muse/2013/05/install-tesseract-ocr-on-ubunt.html 

2.  make sure the language pack permission is 755

     conan@ubuntu:~$ ll /usr/local/share/tessdata/

     -rwxr-xr-x 1 root root 39973777 Sep 23 20:36 chi_sim.traineddata*

3.  try to recognize a Chinese Simplified character

     conan@ubuntu:~$ tesseract ma.png out -l chi_sim

     Error opening data file /usr/local/share/tessdata/eng.traineddata

     Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.

     Failed loading language 'eng'

     Tesseract couldn't load any languages!

     Could not initialize tesseract.

4. but TESSDATA_PREFIX has the correct path

    conan@ubuntu:~$ env |grep TESSDATA_PREFIX

    TESSDATA_PREFIX=/usr/local/share

5. and tesseract version

    conan@ubuntu:~$ tesseract -v

    tesseract 3.02.02

    leptonica-1.69

    libjpeg 8b : libpng 1.2.46 : libtiff 3.9.5 : zlib 1.2.3.4

what is the problem? 

在 2013年9月17日星期二UTC+8上午3时16分05秒，Daniel Lerch写道：