node-paperclip-ocr

=========

This is a plugin that works with node-paperclip. It reads images and does optical character recognition and extracts the text using tesseract.

To install

sudo apt-get install libleptonica-dev
sudo apt-get install g++ # or clang++ (presumably)
sudo apt-get install autoconf automake libtool
sudo apt-get install autoconf-archive
sudo apt-get install pkg-config
sudo apt-get install libpng12-dev
sudo apt-get install libjpeg8-dev
sudo apt-get install libtiff5-dev
sudo apt-get install zlib1g-dev
sudo apt-get install libicu-dev
sudo apt-get install libpango1.0-dev
sudo apt-get install libcairo2-dev
sudo apt-get install libtesseract-dev

Windows? Try http://emop.tamu.edu/Installing-Tesseract-Windows8 and tell me if it worked ok.

npm install node-paperclip-ocr --save

Here is an example of a model that uses the mongoose plugin.

const mongoose     = require('mongoose');
const Schema       = mongoose.Schema;
const Paperclip    = require('node-paperclip');

const Image = new Schema({});

Image.plugin(Paperclip.plugins.mongoose, {
  image: {
    image: { 
      before_save: [{task: require('node-paperclip-ocr')}]
      class_name: 'image',
      has_attached_file: 'image', 
      styles: [
        { original: true },
      ],
      storage: 'file'
    }
  }
})

module.exports     = mongoose.model('Image', Image);

Here is an example of an express route that uses that Image model.

const express      = require('express');
const router       = express.Router();

const Image        = require('image');
const middleware   = require('node-paperclip').middleware

router.post('/post_image',

    middleware.parse(), 

  function (req, res) {  
    Image.create(req.body.image, function(err, doc) {
      res.redirect('/');
    });
})

    <form  class="form-horizontal" enctype="multipart/form-data" action="/post_image" method="post">

    <div>
      <label>File</label>
      <input type="file" name="image[image]" id="file">
    </div>

    <div  class="form-group">
      <div class="col-sm-offset-2 col-sm-10">
        <input class='btn btn-default' type="submit" value="Save"/>
      </div>
    </div>
    </form>

This module uses s3 by default, but can use a file system if you want. The example above is configured to use the file system. If you plan to use s3 you will need the following environment variables set the AWS_BUCKET, AWS_REGION, AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.

Contributing

If you'd like to contribute a feature or bugfix: Thanks! To make sure your fix/feature has a high chance of being included, please read the following guidelines:

1. Post a pull request.
2. Make sure there are tests! We will not accept any patch that is not tested. It's a rare time when explicit tests aren't needed. If you have questions about writing tests for paperclip, please open a GitHub issue.

And once there are some contributors, then I would like to thank all of the contributors!

License

It is free software, and may be redistributed under the terms specified in the MIT-LICENSE file.

Copyright

© 2017 Scott Ballantyne. See LICENSE for details.