Examples with TessBaseAPI com.googlecode.tesseract.android.TessBaseAPI used on opensource projects

Example 1 with TessBaseAPI

use of com.googlecode.tesseract.android.TessBaseAPI in project android-ocr by rmtheis.

the class CaptureActivity method initOcrEngine.

/**
   * Requests initialization of the OCR engine with the given parameters.
   * 
   * @param storageRoot Path to location of the tessdata directory to use
   * @param languageCode Three-letter ISO 639-3 language code for OCR 
   * @param languageName Name of the language for OCR, for example, "English"
   */
private void initOcrEngine(File storageRoot, String languageCode, String languageName) {
    isEngineReady = false;
    // Set up the dialog box for the thermometer-style download progress indicator
    if (dialog != null) {
        dialog.dismiss();
    }
    dialog = new ProgressDialog(this);
    // If we have a language that only runs using Cube, then set the ocrEngineMode to Cube
    if (ocrEngineMode != TessBaseAPI.OEM_CUBE_ONLY) {
        for (String s : CUBE_REQUIRED_LANGUAGES) {
            if (s.equals(languageCode)) {
                ocrEngineMode = TessBaseAPI.OEM_CUBE_ONLY;
                SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
                prefs.edit().putString(PreferencesActivity.KEY_OCR_ENGINE_MODE, getOcrEngineModeName()).commit();
            }
        }
    }
    // If our language doesn't support Cube, then set the ocrEngineMode to Tesseract
    if (ocrEngineMode != TessBaseAPI.OEM_TESSERACT_ONLY) {
        boolean cubeOk = false;
        for (String s : CUBE_SUPPORTED_LANGUAGES) {
            if (s.equals(languageCode)) {
                cubeOk = true;
            }
        }
        if (!cubeOk) {
            ocrEngineMode = TessBaseAPI.OEM_TESSERACT_ONLY;
            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
            prefs.edit().putString(PreferencesActivity.KEY_OCR_ENGINE_MODE, getOcrEngineModeName()).commit();
        }
    }
    // Display the name of the OCR engine we're initializing in the indeterminate progress dialog box
    indeterminateDialog = new ProgressDialog(this);
    indeterminateDialog.setTitle("Please wait");
    String ocrEngineModeName = getOcrEngineModeName();
    if (ocrEngineModeName.equals("Both")) {
        indeterminateDialog.setMessage("Initializing Cube and Tesseract OCR engines for " + languageName + "...");
    } else {
        indeterminateDialog.setMessage("Initializing " + ocrEngineModeName + " OCR engine for " + languageName + "...");
    }
    indeterminateDialog.setCancelable(false);
    indeterminateDialog.show();
    if (handler != null) {
        handler.quitSynchronously();
    }
    // with low memory that crash when running OCR with Cube, and prevent unwanted delays.
    if (ocrEngineMode == TessBaseAPI.OEM_CUBE_ONLY || ocrEngineMode == TessBaseAPI.OEM_TESSERACT_CUBE_COMBINED) {
        Log.d(TAG, "Disabling continuous preview");
        isContinuousModeActive = false;
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        prefs.edit().putBoolean(PreferencesActivity.KEY_CONTINUOUS_PREVIEW, false);
    }
    // Start AsyncTask to install language data and init OCR
    baseApi = new TessBaseAPI();
    new OcrInitAsyncTask(this, baseApi, dialog, indeterminateDialog, languageCode, languageName, ocrEngineMode).execute(storageRoot.toString());
}