tremusa/omr

Optical Mark Recognition with PHP

Optical Mark Recognition from PHP

This is an open source library written in PHP for recognition markings on questionnaires scans

See: https://en.wikipedia.org/wiki/Optical_mark_recognition

How to use

Add library:

$ composer require jansenfelipe/omr

Scanners

This library needs PHP ImageMagick extension to make images of reading

http://php.net/manual/en/imagick.setup.php

Console

Run the following command through the image and mapping:

$ php vendor/bin/omr scan <imageJPG> <mapJSON>

Example:

$ php vendor/bin/omr scan questionarie.jpg map.json

Map JSON

The map is a JSON file with image information and the positions (targets) to be recognized.

Example:

{
  "dpi": 300,
  "width": 2480,
  "height": 3508,
  "limits": {
    "topRight": {
      "x": 2345,
      "y": 140
    },
    "bottomLeft": {
      "x": 115,
      "y": 3338
    }
  },
  "targets": [
    {
      "y1": 430,
      "y2": 470,
      "x1": 770,
      "x2": 810,
      "id": "a1",
      "type": "rectangle"
    },
    {
      "y1": 430,
      "y2": 470,
      "x1": 860,
      "x2": 900,
      "id": "a2",
      "type": "rectangle"
    }
  ]
}

License

The MIT License (MIT)