Tesseract OCR wrapper for React Native

by React Native Example

react-native-tesseract-ocr

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

Getting started

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

Mostly automatic installation

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

Example

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 ...
}

GitHub