path: root/README.md

<p align="center">
<a href="https://tesseract.projectnaptha.com/"><img width="256px" height="256px" alt="Tesseract.js" src="./docs/images/tesseract.png"></a>
</p>

![Lint & Test](https://github.com/naptha/tesseract.js/workflows/Node.js%20CI/badge.svg)
![CodeQL](https://github.com/naptha/tesseract.js/workflows/CodeQL/badge.svg)
[![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-ready--to--code-blue?logo=gitpod)](https://github.com/naptha/tesseract.js) 
[![Financial Contributors on Open Collective](https://opencollective.com/tesseractjs/all/badge.svg?label=financial+contributors)](https://opencollective.com/tesseractjs) [![npm version](https://badge.fury.io/js/tesseract.js.svg)](https://badge.fury.io/js/tesseract.js)
[![Maintenance](https://img.shields.io/badge/Maintained%3F-yes-green.svg)](https://github.com/naptha/tesseract.js/graphs/commit-activity)
[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
[![Code Style](https://badgen.net/badge/code%20style/airbnb/ff5a5f?icon=airbnb)](https://github.com/airbnb/javascript)
[![Downloads Total](https://img.shields.io/npm/dt/tesseract.js.svg)](https://www.npmjs.com/package/tesseract.js)
[![Downloads Month](https://img.shields.io/npm/dm/tesseract.js.svg)](https://www.npmjs.com/package/tesseract.js)

<h3 align="center">
  Version 2 is now available and under development in the master branch, read a story about v2: <a href="https://medium.com/@jeromewus/why-i-refactor-tesseract-js-v2-50f750a9cfe2">Why I refactor tesseract.js v2?</a><br>
  Check the <a href="https://github.com/naptha/tesseract.js/tree/support/1.x">support/1.x</a> branch for version 1
</h3>

<br>

Tesseract.js is a javascript library that gets words in [almost any language](./docs/tesseract_lang_list.md) out of images. ([Demo](http://tesseract.projectnaptha.com/))

Image Recognition

[![fancy demo gif](./docs/images/demo.gif)](http://tesseract.projectnaptha.com)

Video Real-time Recognition

<p align="center">
  <a href="https://github.com/jeromewu/tesseract.js-video"><img alt="Tesseract.js Video" src="./docs/images/video-demo.gif"></a>
</p>


Tesseract.js wraps an [emscripten](https://github.com/kripken/emscripten) [port](https://github.com/naptha/tesseract.js-core) of the [Tesseract](https://github.com/tesseract-ocr/tesseract) [OCR](https://en.wikipedia.org/wiki/Optical_character_recognition) Engine.
It works in the browser using [webpack](https://webpack.js.org/) or plain script tags with a [CDN](#CDN) and on the server with [Node.js](https://nodejs.org/en/).
After you [install it](#installation), using it is as simple as:

```javascript
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

```javascript
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](#documentation) 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
```html
<!-- v2 -->
<script src='https://unpkg.com/tesseract.js@v2.1.0/dist/tesseract.min.js'></script>

<!-- v1 -->
<script src='https://unpkg.com/tesseract.js@1.0.19/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**

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

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


## Documentation

* [Examples](./docs/examples.md)
* [Image Format](./docs/image-format.md)
* [API](./docs/api.md)
* [Local Installation](./docs/local-installation.md)
* [FAQ](./docs/faq.md)

## 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:
```shell
# 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. 

[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/naptha/tesseract.js/blob/master/examples/browser/demo.html)

### Building Static Files
To build the compiled static files just execute the following:
```shell
npm run build
```
This will output the files into the `dist` directory.

## Contributors

### Code Contributors

This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
<a href="https://github.com/naptha/tesseract.js/graphs/contributors"><img src="https://opencollective.com/tesseractjs/contributors.svg?width=890&button=false" /></a>

### Financial Contributors

Become a financial contributor and help us sustain our community. [[Contribute](https://opencollective.com/tesseractjs/contribute)]

#### Individuals

<a href="https://opencollective.com/tesseractjs"><img src="https://opencollective.com/tesseractjs/individuals.svg?width=890"></a>

#### Organizations

Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/tesseractjs/contribute)]

<a href="https://opencollective.com/tesseractjs/organization/0/website"><img src="https://opencollective.com/tesseractjs/organization/0/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/1/website"><img src="https://opencollective.com/tesseractjs/organization/1/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/2/website"><img src="https://opencollective.com/tesseractjs/organization/2/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/3/website"><img src="https://opencollective.com/tesseractjs/organization/3/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/4/website"><img src="https://opencollective.com/tesseractjs/organization/4/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/5/website"><img src="https://opencollective.com/tesseractjs/organization/5/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/6/website"><img src="https://opencollective.com/tesseractjs/organization/6/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/7/website"><img src="https://opencollective.com/tesseractjs/organization/7/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/8/website"><img src="https://opencollective.com/tesseractjs/organization/8/avatar.svg"></a>
<a href="https://opencollective.com/tesseractjs/organization/9/website"><img src="https://opencollective.com/tesseractjs/organization/9/avatar.svg"></a>