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EU Driver License OCR Node.js

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The Node.js OCR SDK supports the Driver License API.

Using the sample below, we are going to illustrate how to extract the data that we want using the OCR SDK.
Driver License sample

Quick-Start

const mindee = require("mindee");
// for TS or modules:
// import * as mindee from "mindee";

// Init a new client
const mindeeClient = new mindee.Client({ apiKey: "my-api-key" });

// Load a file from disk
const inputSource = mindeeClient.docFromPath("/path/to/the/file.ext");

// Parse the file
const apiResponse = mindeeClient.parse(
  mindee.product.eu.DriverLicenseV1,
  inputSource
);

// Handle the response Promise
apiResponse.then((resp) => {
  // print a string summary
  console.log(resp.document.toString());
});

Output (RST):

########
Document
########
:Mindee ID: b19cc32e-b3e6-4ff9-bdc7-619199355d54
:Filename: default_sample.jpg

Inference
#########
:Product: mindee/eu_driver_license v1.0
:Rotation applied: Yes

Prediction
==========
:Country Code: FR
:Document ID: 13AA00002
:Driver License Category: AM A1 B1 B D BE DE
:Last Name: MARTIN
:First Name: PAUL
:Date Of Birth: 1981-07-14
:Place Of Birth: Utopiacity
:Expiry Date: 2018-12-31
:Issue Date: 2013-01-01
:Issue Authority: 99999UpiaCity
:MRZ: D1FRA13AA000026181231MARTIN<<9
:Address:

Page Predictions
================

Page 0
------
:Photo: Polygon with 4 points.
:Signature: Polygon with 4 points.
:Country Code: FR
:Document ID: 13AA00002
:Driver License Category: AM A1 B1 B D BE DE
:Last Name: MARTIN
:First Name: PAUL
:Date Of Birth: 1981-07-14
:Place Of Birth: Utopiacity
:Expiry Date: 2018-12-31
:Issue Date: 2013-01-01
:Issue Authority: 99999UpiaCity
:MRZ: D1FRA13AA000026181231MARTIN<<9
:Address:

Field Types

Standard Fields

These fields are generic and used in several products.

Basic Field

Each prediction object contains a set of fields that inherit from the generic Field class.
A typical Field object will have the following attributes:

  • value (number | string): corresponds to the field value. Can be undefined if no value was extracted.
  • confidence (number): the confidence score of the field prediction.
  • boundingBox ([Point, Point, Point, Point]): contains exactly 4 relative vertices (points) coordinates of a right rectangle containing the field in the document.
  • polygon (Point[]): contains the relative vertices coordinates (Point) of a polygon containing the field in the image.
  • pageId (number): the ID of the page, always undefined when at document-level.
  • reconstructed (boolean): indicates whether an object was reconstructed (not extracted as the API gave it).

Note: A Point simply refers to an array of two numbers ([number, number]).

Aside from the previous attributes, all basic fields have access to a toString() method that can be used to print their value as a string.

Date Field

Aside from the basic Field attributes, the date field DateField also implements the following:

  • dateObject (Date): an accessible representation of the value as a JavaScript object.

Position Field

The position field PositionField does not implement all the basic Field attributes, only boundingBox, polygon and pageId. On top of these, it has access to:

  • rectangle ([Point, Point, Point, Point]): a Polygon with four points that may be oriented (even beyond canvas).
  • quadrangle ([Point, Point, Point, Point]): a free polygon made up of four points.

String Field

The text field StringField only has one constraint: its value is a string (or undefined).

Page-Level Fields

Some fields are constrained to the page level, and so will not be retrievable at document level.

Attributes

The following fields are extracted for Driver License V1:

Address

address (StringField): EU driver license holders address

console.log(result.document.inference.prediction.address.value);

Driver License Category

category (StringField): EU driver license holders categories

console.log(result.document.inference.prediction.category.value);

Country Code

countryCode (StringField): Country code extracted as a string.

console.log(result.document.inference.prediction.countryCode.value);

Date Of Birth

dateOfBirth (DateField): The date of birth of the document holder

console.log(result.document.inference.prediction.dateOfBirth.value);

Document ID

documentId (StringField): ID number of the Document.

console.log(result.document.inference.prediction.documentId.value);

Expiry Date

expiryDate (DateField): Date the document expires

console.log(result.document.inference.prediction.expiryDate.value);

First Name

firstName (StringField): First name(s) of the driver license holder

console.log(result.document.inference.prediction.firstName.value);

Issue Authority

issueAuthority (StringField): Authority that issued the document

console.log(result.document.inference.prediction.issueAuthority.value);

Issue Date

issueDate (DateField): Date the document was issued

console.log(result.document.inference.prediction.issueDate.value);

Last Name

lastName (StringField): Last name of the driver license holder.

console.log(result.document.inference.prediction.lastName.value);

MRZ

mrz (StringField): Machine-readable license number

console.log(result.document.inference.prediction.mrz.value);

Photo

📄photo (PositionField): Has a photo of the EU driver license holder

for (const photoElem of result.document.photo) {
  console.log(photoElem.polygon);
}

Place Of Birth

placeOfBirth (StringField): Place where the driver license holder was born

console.log(result.document.inference.prediction.placeOfBirth.value);

Signature

📄signature (PositionField): Has a signature of the EU driver license holder

for (const signatureElem of result.document.signature) {
  console.log(signatureElem.polygon);
}

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Updated 2 months ago