开源软件名称：

naptha/tesseract.js

开源软件地址：

https://github.com/naptha/tesseract.js

开源编程语言：

JavaScript 96.2%

开源软件介绍：

Version 2 is now available and under development in the master branch, read a story about v2: Why I refactor tesseract.js v2?
Check the support/1.x branch for version 1

Tesseract.js is a javascript library that gets words in almost any language out of images. (Demo)

Image Recognition

Video Real-time Recognition

Tesseract.js wraps an emscripten port of the Tesseract OCR Engine. It works in the browser using webpack or plain script tags with a CDN and on the server with Node.js. After you install it, using it is as simple as:

import Tesseract from 'tesseract.js';

Tesseract.recognize(
  'https://tesseract.projectnaptha.com/img/eng_bw.png',
  'eng',
  { logger: m => console.log(m) }
).then(({ data: { text } }) => {
  console.log(text);
})

Or more imperative

import { createWorker } from 'tesseract.js';

const worker = createWorker({
  logger: m => console.log(m)
});

(async () => {
  await worker.load();
  await worker.loadLanguage('eng');
  await worker.initialize('eng');
  const { data: { text } } = await worker.recognize('https://tesseract.projectnaptha.com/img/eng_bw.png');
  console.log(text);
  await worker.terminate();
})();

Check out the docs for a full explanation of the API.

Major changes in v2

Upgrade to tesseract v4.1.1 (using emscripten 1.39.10 upstream)
Support multiple languages at the same time, eg: eng+chi_tra for English and Traditional Chinese
Supported image formats: png, jpg, bmp, pbm
Support WebAssembly (fallback to ASM.js when browser doesn't support)
Support Typescript

Installation

Tesseract.js works with a <script> tag via local copy or CDN, with webpack via npm and on Node.js with npm/yarn.

CDN

<!-- v2 -->
<script src='https://unpkg.com/[email protected]/dist/tesseract.min.js'></script>

<!-- v1 -->
<script src='https://unpkg.com/[email protected]/src/index.js'></script>

After including the script the Tesseract variable will be globally available.

Node.js

Tesseract.js currently requires Node.js v6.8.0 or higher

# For v2
npm install tesseract.js
yarn add tesseract.js

# For v1
npm install tesseract.js@1
yarn add tesseract.js@1

Documentation

Use tesseract.js the way you like!

Offline Version: https://github.com/jeromewu/tesseract.js-offline
Electron Version: https://github.com/jeromewu/tesseract.js-electron
Custom Traineddata: https://github.com/jeromewu/tesseract.js-custom-traineddata
Chrome Extension #1: https://github.com/jeromewu/tesseract.js-chrome-extension
Chrome Extension #2: https://github.com/fxnoob/image-to-text
Firefox Extension: https://github.com/gnonio/korporize
With Vue: https://github.com/jeromewu/tesseract.js-vue-app
With Angular: https://github.com/jeromewu/tesseract.js-angular-app
With React: https://github.com/jeromewu/tesseract.js-react-app
Typescript: https://github.com/jeromewu/tesseract.js-typescript
Video Real-time Recognition: https://github.com/jeromewu/tesseract.js-video

Contributing

Development

To run a development copy of Tesseract.js do the following:

# First we clone the repository
git clone https://github.com/naptha/tesseract.js.git
cd tesseract.js

# Then we install the dependencies
npm install

# And finally we start the development server
npm start

The development server will be available at http://localhost:3000/examples/browser/demo.html in your favorite browser. It will automatically rebuild tesseract.dev.js and worker.dev.js when you change files in the src folder.

Online Setup with a single Click

You can use Gitpod(A free online VS Code like IDE) for contributing. With a single click it will launch a ready to code workspace with the build & start scripts already in process and within a few seconds it will spin up the dev server so that you can start contributing straight away without wasting any time.