react-native-tesseract-ocr 👀

react-native-tesseract-ocr is a react-native wrapper for Tesseract OCR

This project uses:

tess-two for Android
Tesseract-OCR-iOS for iOS ⚠️ (This has NOT been implemented yet) ⚠️

NOTE: It is recommended to use react-native >= 0.60.0

Getting started

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

Mostly automatic installation

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

Example

Check the example by yourself here

Usage

tessOptions

Property	Type	Description
allowlist	`string`	List of characters you want to recognize
denylist	`string`	List of characters you DON'T want to recognize
level	`Level`	Level of the tokens of the page hierarchy (only used in `recognizeTokens`)

Level can be one of the following values 'symbol' | 'block' | 'line' | 'paragraph' | 'word'

recognize

import TesseractOcr, { LANG_ENGLISH } from 'react-native-tesseract-ocr';

const tessOptions = {};
TesseractOcr.recognize(imageSource, LANG_ENGLISH, tessOptions);

recognizeTokens

import TesseractOcr, { LANG_ENGLISH, LEVEL_WORD } from 'react-native-tesseract-ocr';

const tessOptions = { level: LEVEL_WORD };
TesseractOcr.recognizeTokens(imageSource, LANG_ENGLISH, tessOptions);

useEventListener

import React, { useState } from 'react';
import { useEventListener } from 'react-native-tesseract-ocr';

function App() {
  const [progress, setProgress] = useState(0);
  useEventListener('onProgressChange', (p) => {
    setProgress(p.percent / 100);
  });

  // return ...
}