setting user-words in api?

[Jochen Naumann]

Hi, I can set the user-words file on the command line with tesseract tool, but how do I set this using the api? 

I searched for it in the sourcecode but could not find it, woult appreciate any help.

[Quan Nguyen]

https://github.com/tesseract-ocr/tesseract/wiki/APIExample

https://github.com/tesseract-ocr/tesseract/issues/960

api->SetVariable("user_words_suffix", "user-words");

[Jochen Naumann]

Thanks, I already tried api->SetVariable("user_words_suffix", "user-words");

Did not work, while specifying it in a config file and using the command line tesseract tool it works.

I used a file monitor tool to see if the process tries to open a user-words file, but it did not. The tesseract tool however does.

I am aware of  https://github.com/tesseract-ocr/tesseract/issues/960

But I am using 4.1, where this is fixed.

Do you have a working example?

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[Zdenko Podobny]

If command line work for you that most easy way is to follow tesseract executable code[1]:

IMO you need to use variable user_words_file; AFAIR user_words_suffix specifies only file extension...

Then it should work[2] e.g. tessseract will load user words (effect on recognition is other topic).

[1] https://github.com/tesseract-ocr/tesseract/blob/4c8b7d5e3539bae18eb8337d5ebc1fccf56c1f93/src/api/tesseractmain.cpp#L357

[2] https://github.com/tesseract-ocr/tesseract/blob/aa78a720a34708eece6e498c32e3593a24aa1e74/src/dict/dict.cpp#L254

Zdenko

st 3. 7. 2019 o 19:59 Jochen Naumann <jochen....@gmail.com> napísal(a):

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[Jochen Naumann]

 user_words_file  also does not work, the file is not loaded ( checked with file monitor).

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[Shree Devi Kumar]

I have made a wiki page for using user_patterns with API. Please see https://github.com/tesseract-ocr/tesseract/wiki/APIExample-user_patterns

You can try similarly for user_words.

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[Jochen Naumann]

Thanks, Shree. I appreciate your help!

I tried your example and it works with your image. Bit it does not work with the attached  image test2.jpg,. Tesseract always reads the O as 0, although I provided the following pattern: L9143CO\d\d\d

I added the user_words_file parameter to the config file, but the setting is ignored (file monitor shows that my.patterns is accessed but tesseract api never tries to open a file called my.user-words)

my config file:

user_patterns_file my.patterns
user_words_file my.user-words
lstm_use_matrix 1

Have a nice day.

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[Shree Devi Kumar]

I haven't tried user_words yet. 

pre-processing the image gets you better results.

It works with the modified image and 

\A\d\d\d\d\A\A\d\d\d

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