Beginner question : could not initialize tesseract, missing eng.traineddata file in tessdata

[Roparzh Hemon]

Hello,

 I am a complete beginner to Tesseract. I just installed it on my Ubuntu machine.

Here is a snippet from my Terminal : 

$ echo TESSDATA_PREFIX

/home/mbalambala/tesseract/tessdata

$ tesseract Downloads/p1.pdf p1

Error opening data file /home/mbalambala/tesseract/tessdata/eng.traineddata

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

Failed loading language 'eng'

Tesseract couldn't load any languages!

Could not initialize tesseract.

$ ls /home/mbalambala/tesseract/tessdata

configs                    eng.user-words Makefile.am pdf.tiff 

eng.user-patterns Makefile              Makefile.in   tessconfigs 

So it seems I need to produce a eng.traineddate file in my tessdata directory, how do I do this ?

[Adriana Camilleri]

Run the following command in order to get the eng.traineddata file within the tessdata directory: wget https://github.com/tesseract-ocr/tessdata/blob/master/eng.traineddata

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[Roparzh Hemon]

I downloaded it as you suggested, and as the terminal output below shows, the file is now present at the correct place :

$file /home/mbalambala/tesseract/tessdata/eng.traineddata

/home/mbalambala/tesseract/tessdata/eng.traineddata : HTML document, UTF-8 Unicode text, with very long lines

$ echo TESSDATA_PREFIX

/home/mbalambala/tesseract/tessdata

but the error message stays exactly the same :

$ tesseract Downloads/p1.pdf p1

Error opening data file /home/mbalambala/tesseract/tessdata/eng.traineddata

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

Failed loading language 'eng'

Tesseract couldn't load any languages!

Could not initialize tesseract.

Whatever the real problem is, the error message is not detecting it.

[Shree Devi Kumar]

>wget https://github.com/tesseract-ocr/tessdata/blob/master/eng.traineddata

That is not correct. You need to get the `raw` file.

https://github.com/tesseract-ocr/tessdata_best/raw/master/eng.traineddata

wget https://github.com/tesseract-ocr/tessdata/blob/master/eng.traineddata  

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[Adriana Camilleri]

My apologies... hope the error is now fixed.

[Roparzh Hemon]

shree : your solution worked for me, thanks a lot.

[Surya VaraPrasad Alla]

Hello,

I have the similar response

pytesseract.pytesseract.TesseractError: (1, "read_params_file: Can't open tessedit_char_blacklist=,;: Error: Tesseract (legacy) engine requested, but components are not present in external/tesstrain/data/eng_pcb/eng_pcb.traineddata!! Failed loading language 'eng_pcb' Tesseract couldn't load any languages! Could not initialize tesseract.")

tesseract --version:
tesseract -v
tesseract 4.1.1
 leptonica-1.82.0
  libgif 5.1.9 : libjpeg 8d (libjpeg-turbo 2.1.1) : libpng 1.6.37 : libtiff 4.3.0 : zlib 1.2.11 : libwebp 1.2.2 : libopenjp2 2.4.0
 Found AVX512BW
 Found AVX512F
 Found AVX2
 Found AVX
 Found FMA
 Found SSE
 Found libarchive 3.6.0 zlib/1.2.11 liblzma/5.2.5 bz2lib/1.0.8 liblz4/1.9.3 libzstd/1.4.8

I am using best float tessdata files from: https://github.com/tesseract-ocr/tessdata_best/blob/main/eng.traineddata

also tried some of possibilities in https://github.com/ocrmypdf/OCRmyPDF/issues/209

I am looking for the source of the issue ---> could someone help if understood the source. so I can work further.

[Zdenko Podobny]

No, you are not using best float tessdata files from: https://github.com/tesseract-ocr/tessdata_best/blob/main/eng.traineddata

There is nothing like eng_pcb.traineddata. (read your error message)

Zdenko

po 22. 4. 2024 o 17:40 Surya VaraPrasad Alla <asvp...@gmail.com> napísal(a):

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[Surya VaraPrasad Alla]

eng_pcb.traineddata is a traineddata starting with eng.traineddata

i did lstm training to improve the detection of ocr rather than the recognition. i used tesstrain git repo. 

final error: couldn't find the legacy components in eng_pcb.traineddata 

[Zdenko Podobny]

If you used the tesstrain you trained the lstm engine. Why do you then ask tesseract to use a legacy engine? 

Do you understand what you are doing?

Zdenko

št 25. 4. 2024 o 11:35 Surya VaraPrasad Alla <asvp...@gmail.com> napísal(a):

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