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tesseract-ocr parameters in 3.02 version   

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?Tesseract is extremely flexible, if you know how to control it. There is a large number of control parameters to modify its behaviour. While these change from time to time, most of them are fairly stable.“ (Tesseract ControlParams wiki)

If you want to get all list of parameters (variables) with its description and default values, you have to search tesseract code. Or continue reading… ;-)

There are two way how to set parameter:

• config file
• Tesseract-OCR API

config file

config file is simple text file without BOM and with Unix end-of-line mark (on Windows you can use some advanced text editor e.g. Notepad++ to achieve this).

If you use tesseract executable this is only way how to change tesseract parameters.

config file should be located in your tessdata/configs directory. Have a look there for some examples.

Tesseract-OCR API

You can set single parameter with API function SetVariable. E.g.

    tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
    api->Init(NULL, "eng");
    if (!api->SetVariable("save_blob_choices","T"))
        printf("Setting variable failed!!!\n");

In case you want (need) to set parameter during tesseract init you need to create vectors for parameters and their values. Here is example how to turn off dictionaries:

    GenericVector pars_vec;
    pars_vec.push_back(“load_system_dawg”);
    pars_vec.push_back(“load_freq_dawg”);
    pars_vec.push_back(“load_punc_dawg”);
    pars_vec.push_back(“load_number_dawg”);
    pars_vec.push_back(“load_unambig_dawg”);
    pars_vec.push_back(“load_bigram_dawg”);
    pars_vec.push_back(“load_fixed_length_dawgs”);


    GenericVector pars_values;
    pars_values.push_back(“F”);
    pars_values.push_back(“F”);
    pars_values.push_back(“F”);
    pars_values.push_back(“F”);
    pars_values.push_back(“F”);
    pars_values.push_back(“F”);
    pars_values.push_back(“F”);

    tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI();
    api->Init(”/usr/share/tesseract/”, “eng”, tesseract::OEM_DEFAULT,
             NULL, 0, &pars_vec, &pars_values, false);
 

Of course you can use also API function ReadConfigFile (or ReadDebugConfigFile) to read tesseract config files with non-init parameters.

parameters in 3.02 version