How to detect vehicle license plates in photos in Node.js

For this task, we want to be able to automatically detect the location and inscription on a vehicle license plate, for example in this photo:

The first step is to add a reference to the library we need:

"dependencies": {
    "cloudmersive-image-api-client": "^1.1.4"
  }

Now, all we need to do is call the recognizeDetectVehicleLicensePlates method:

var CloudmersiveImageApiClient = require('cloudmersive-image-api-client');
var defaultClient = CloudmersiveImageApiClient.ApiClient.instance;
// Configure API key authorization: Apikey
var Apikey = defaultClient.authentications['Apikey'];
Apikey.apiKey = 'YOUR API KEY';
var apiInstance = new CloudmersiveImageApiClient.RecognizeApi();
var imageFile = Buffer.from(fs.readFileSync("C:\\temp\\inputfile").buffer); // File | Image file to perform the operation on.  Common file formats such as PNG, JPEG are supported.
var callback = function(error, data, response) {
  if (error) {
    console.error(error);
  } else {
    console.log('API called successfully. Returned data: ' + data);
  }
};
apiInstance.recognizeDetectVehicleLicensePlates(imageFile, callback);

And this will give us our desired output:

{
  "Successful": true,
  "DetectedLicensePlates": [
    {
      "LocationX": 290,
      "LocationY": 341,
      "Width": 186,
      "Height": 81,
      "LicensePlateText_BestMatch": "0MG77",
      "LicensePlateText_RunnerUp": "B0MG77",
      "LicensePlateRecognitionConfidenceLevel": 0.849610595703125
    }
  ],
  "DetectedLicensePlateCount": 1
}

That’s all there is to it. No we can process license plates easily.