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

$ npm install react-native-tesseract-ocr --save

Mostly automatic installation

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

Don't forget to add trained data files to the appropriate folder

Manual installation

iOS

1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ react-native-tesseract-ocr and add RNTesseractOcr.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNTesseractOcr.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<

Android

1. Open up android/app/src/main/java/[...]/MainActivity.java

• Add import com.reactlibrary.RNTesseractOcrPackage; to the imports at the top of the file
• Add new RNTesseractOcrPackage() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-tesseract-ocr'
   project(':react-native-tesseract-ocr').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-tesseract-ocr/android')
   

3. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':react-native-tesseract-ocr')
   

4. Trained data files for a language must be extracted in android/app/src/main/assets/tessdata.

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.
 */
RNTesseractOcr.startOcr(imgPath, lang)
  .then((result) => {
    this.setState({ ocrResult: result });
    console.log("OCR Result: ", result);
  })
  .catch((err) => {
    console.log("OCR Error: ", err);
  })
  .done();

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

Example

Try the included TesseractOcrSample:

• git clone [email protected]:jonathanpalma/react-native-tesseract-ocr.git
• cd react-native-tesseract-ocr/tesseractOcrSample/
• npm install

NOTE: Don't forget to add trained data files to the appropriate folder

TODOS

• Add iOS support
• Optimize ocr for large images

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