RazorMrzLibrary 1.0.0

Razor MRZ Library

A Razor Class Library built using the Dynamsoft Label Recognizer SDK, which provides APIs for scanning MRZ (Machine Readable Zone) on passports and IDs.

Online Demo

https://yushulx.me/Razor-MRZ-Library/

Prerequisites

• Dynamsoft Label Recognizer License

Quick Usage

• Import and initialize the Razor MRZ Library.

  @using RazorMrzLibrary
  
  @code {
      private MrzJsInterop? mrzJsInterop;
  
      protected override async Task OnInitializedAsync()
      {
          mrzJsInterop = new MrzJsInterop(JSRuntime);
          await mrzJsInterop.LoadJS();
      }
  }
  

• Set the license key and load the wasm module.

  await mrzJsInterop.SetLicense(licenseKey);
  await mrzJsInterop.LoadWasm();
  

• Createa a MRZ recognizer instance.

  MrzRecognizer recognizer = await mrzJsInterop.CreateMrzRecognizer();
  

• Recognize MRZ text from an image.

  List<OcrResult> results = await recognizer.DecodeCanvas(canvas);
  

• Parse MRZ text.

  string[] lines = new string[results.Count];
  for (int i = 0; i < results.Count; i++)
  {
      lines[i] = result.Text;
  }
  MrzResult mrzResult = MrzParser.Parse(lines);
  

API

OcrResult Class

Represents a line of text recognized by the OCR engine.

MrzResult Class

Represents the result of parsing MRZ text.

MrzParser Class

• static MrzResult Parse(string[] lines): Parses MRZ text.

MrzRecognizer Class

• Task<List<OcrResult>> DecodeCanvas(IJSObjectReference canvas): Recognizes MRZ text from a canvas object.

MrzJsInterop Class

• Task LoadJS(): Loads the Dynamsoft Label Recognizer JavaScript library.
• Task SetLicense(string license): Sets the license key.
• Task LoadWasm(): Loads the Dynamsoft Label Recognizer WebAssembly module.
• Task<MrzRecognizer> CreateMrzRecognizer(): Creates a MRZ recognizer instance.

Example

• Blazor MRZ Scanner

  

Build

cd RazorMrzLibrary
dotnet build --configuration Release