The .NET OCR SDK supports the Carte Nationale d'Identité API.

Using the sample below, we are going to illustrate how to extract the data that we want using the OCR SDK.
Carte Nationale d'Identité sample

Quick-Start

using Mindee;
using Mindee.Input;
using Mindee.Product.Fr.IdCard;

string apiKey = "my-api-key";
string filePath = "/path/to/the/file.ext";

// Construct a new client
MindeeClient mindeeClient = new MindeeClient(apiKey);

// Load an input source as a path string
// Other input types can be used, as mentioned in the docs
var inputSource = new LocalInputSource(filePath);

// Call the API and parse the input
var response = await mindeeClient
    .ParseAsync<IdCardV2>(inputSource);

// Print a summary of all the predictions
System.Console.WriteLine(response.Document.ToString());

// Print only the document-level predictions
// System.Console.WriteLine(response.Document.Inference.Prediction.ToString());

Output (RST):

########
Document
########
:Mindee ID: d33828f1-ef7e-4984-b9df-a2bfaa38a78d
:Filename: default_sample.jpg

Inference
#########
:Product: mindee/idcard_fr v2.0
:Rotation applied: Yes

Prediction
==========
:Nationality:
:Card Access Number: 175775H55790
:Document Number:
:Given Name(s): Victor
                Marie
:Surname: DAMBARD
:Alternate Name:
:Date of Birth: 1994-04-24
:Place of Birth: LYON 4E ARRONDISSEM
:Gender: M
:Expiry Date: 2030-04-02
:Mrz Line 1: IDFRADAMBARD<<<<<<<<<<<<<<<<<<075025
:Mrz Line 2: 170775H557903VICTOR<<MARIE<9404246M5
:Mrz Line 3:
:Date of Issue: 2015-04-03
:Issuing Authority: SOUS-PREFECTURE DE BELLE (02)

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

Page 0
------
:Document Type: OLD
:Document Sides: RECTO & VERSO
:Nationality:
:Card Access Number: 175775H55790
:Document Number:
:Given Name(s): Victor
                Marie
:Surname: DAMBARD
:Alternate Name:
:Date of Birth: 1994-04-24
:Place of Birth: LYON 4E ARRONDISSEM
:Gender: M
:Expiry Date: 2030-04-02
:Mrz Line 1: IDFRADAMBARD<<<<<<<<<<<<<<<<<<075025
:Mrz Line 2: 170775H557903VICTOR<<MARIE<9404246M5
:Mrz Line 3:
:Date of Issue: 2015-04-03
:Issuing Authority: SOUS-PREFECTURE DE BELLE (02)

Field Types

Standard Fields

These fields are generic and used in several products.

BaseField

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

Confidence (double?): the confidence score of the field prediction.
BoundingBox (BoundingBox): contains exactly 4 relative vertices (points) coordinates of a right rectangle containing the field in the document.
Polygon (Polygon): contains the relative vertices coordinates (Polygon extends List<Point>) of a polygon containing the field in the image.
PageId (int?): the ID of the page, always null when at document-level.

Note: A Point simply refers to a List of double.

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

ClassificationField

The classification field ClassificationField extends BaseField, but also implements:

Value (strong): corresponds to the field value.

Note: a classification field's value is always a string`.

StringField

The text field StringField extends BaseField, but also implements:

Value (string): corresponds to the field value.
RawValue (string): corresponds to the raw value as it appears on the document.

DateField

The date field DateField extends StringField, but also implements:

DateObject (DateTime?): an accessible representation of the value as a C# object. Can be null.

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 Carte Nationale d'Identité V2:

Alternate Name

AlternateName: The alternate name of the card holder.

System.Console.WriteLine(result.Document.Inference.Prediction.AlternateName.Value);

Issuing Authority

Authority: The name of the issuing authority.

System.Console.WriteLine(result.Document.Inference.Prediction.Authority.Value);

Date of Birth

BirthDate: The date of birth of the card holder.

System.Console.WriteLine(result.Document.Inference.Prediction.BirthDate.Value);

Place of Birth

BirthPlace: The place of birth of the card holder.

System.Console.WriteLine(result.Document.Inference.Prediction.BirthPlace.Value);

Card Access Number

CardAccessNumber: The card access number (CAN).

System.Console.WriteLine(result.Document.Inference.Prediction.CardAccessNumber.Value);

Document Number

DocumentNumber: The document number.

System.Console.WriteLine(result.Document.Inference.Prediction.DocumentNumber.Value);

Document Sides

📄DocumentSide: The sides of the document which are visible.

foreach (var DocumentSideElem in result.Document.Inference.Prediction.DocumentSide)
{
    System.Console.WriteLine(DocumentSideElem)
      .Value;
}

Document Type

📄DocumentType: The document type or format.

foreach (var DocumentTypeElem in result.Document.Inference.Prediction.DocumentType)
{
    System.Console.WriteLine(DocumentTypeElem)
      .Value;
}

Expiry Date

ExpiryDate: The expiry date of the identification card.

System.Console.WriteLine(result.Document.Inference.Prediction.ExpiryDate.Value);

Gender

Gender: The gender of the card holder.

System.Console.WriteLine(result.Document.Inference.Prediction.Gender.Value);

Given Name(s)

GivenNames: The given name(s) of the card holder.

foreach (var GivenNamesElem in result.Document.Inference.Prediction.GivenNames)
{
    System.Console.WriteLine(GivenNamesElem.Value);
}

Date of Issue

IssueDate: The date of issue of the identification card.

System.Console.WriteLine(result.Document.Inference.Prediction.IssueDate.Value);

Mrz Line 1

Mrz1: The Machine Readable Zone, first line.

System.Console.WriteLine(result.Document.Inference.Prediction.Mrz1.Value);

Mrz Line 2

Mrz2: The Machine Readable Zone, second line.

System.Console.WriteLine(result.Document.Inference.Prediction.Mrz2.Value);

Mrz Line 3

Mrz3: The Machine Readable Zone, third line.

System.Console.WriteLine(result.Document.Inference.Prediction.Mrz3.Value);

Nationality

Nationality: The nationality of the card holder.

System.Console.WriteLine(result.Document.Inference.Prediction.Nationality.Value);

Surname

Surname: The surname of the card holder.

System.Console.WriteLine(result.Document.Inference.Prediction.Surname.Value);

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