react-native-tesseract-ocr

react-native-tesseract-ocr is a react-native wrapper for Tesseract OCR using base on

• tess-two for Android
• Tesseract-OCR-iOS for iOS (Not implemented yet)

Getting started

$ yarn add https://github.com/ducnmisbk/react-native-tesseract-ocr.git

Mostly automatic installation

$ react-native link react-native-tesseract-ocr

Don't forget to ...

• add v3.04 trained data files to the appropriate folder
• install CocoaPods in your react-native project and add the following line to your Podfile then run pod install (iOS only)

  pod 'TesseractOCRiOS', '4.0.0'
  pod 'GPUImage', '0.1.7'
  

• disable bitcode
• add libz.tbd in target app -> Link Binary With Libraries
• https://github.com/Kila2/libstdc-.6.0.9.tbd

Usage

import RNTesseractOcr from 'react-native-tesseract-ocr';


/**
 * @param {string} imgPath - The path of the image.
 * @param {string} lang - The language you want to process.
 * @param {object} tessOptions - Tesseract options.
 */
 const tessOptions = {
  whitelist: null, 
  blacklist: '1234567890\'!"#$%&/()={}[]+*-_:;<>'
};
RNTesseractOcr.recognize(imgPath, lang, tessOptions)
  .then((result) => {
    this.setState({ ocrResult: result });
    console.log("OCR Result: ", result);
  })
  .catch((err) => {
    console.log("OCR Error: ", err);
  })
  .done();

NOTE: The method startOcr is deprecated. Instead, use recognize

Supported languages

• LANG_AFRIKAANS
• LANG_AMHARIC
• LANG_ARABIC
• LANG_ASSAMESE
• LANG_AZERBAIJANI
• LANG_BELARUSIAN
• LANG_BOSNIAN
• LANG_BULGARIAN
• LANG_CHINESE_SIMPLIFIED
• LANG_CHINESE_TRADITIONAL
• LANG_CROATIAN
• LANG_DANISH
• LANG_ENGLISH
• LANG_ESTONIAN
• LANG_FRENCH
• LANG_GALICIAN
• LANG_GERMAN
• LANG_HEBREW
• LANG_HUNGARIAN
• LANG_ICELANDIC
• LANG_INDONESIAN
• LANG_IRISH
• LANG_ITALIAN
• LANG_JAPANESE
• LANG_KOREAN
• LANG_LATIN
• LANG_LITHUANIAN
• LANG_NEPALI
• LANG_NORWEGIAN
• LANG_PERSIAN
• LANG_POLISH
• LANG_PORTUGUESE
• LANG_RUSSIAN
• LANG_SERBIAN
• LANG_SLOVAK
• LANG_SPANISH
• LANG_SWEDISH
• LANG_TURKISH
• LANG_UKRAINIAN
• LANG_VIETNAMESE

If you want to use your own trained data file

• LANG_CUSTOM

Locate your own trained data file as custom.traineddata into android/app/src/main/assets/tessdata.

Contribution

Contributions are welcome 🙌

License

This repository is distributed under MIT license

• Tesseract OCR - maintained by Google, is distributed under Apache 2.0 license
• tess-two is distributed under Apache 2.0 license
• Tesseract-OCR-iOS is distributed under MIT license