This tutorial shows how to create a C# Windows Console application that will utilize MRTD extraction and processing using the LEADTOOLS SDK.
Overview | |
---|---|
Summary | This tutorial covers how to use LEADTOOLS MRTD SDK technology in a C# Windows Console application. |
Completion Time | 30 minutes |
Visual Studio Project | Download tutorial project (3 KB) |
Platform | Windows Console C# Application |
IDE | Visual Studio 2017, 2019 |
Development License | Download LEADTOOLS |
Try it in another language |
Get familiar with the basic steps of creating a project by reviewing the Add References and Set a License tutorial, before working on the Detect and Extract MRTD - Console C# tutorial.
In Visual Studio, create a new C# Windows Console project, and add the following necessary LEADTOOLS references.
The references needed depend upon the purpose of the project. References can be added by one or the other of the following two methods (but not both). For this project, the following references are needed:
If using NuGet references, this tutorial requires the following NuGet packages:
Leadtools.Formats.Raster.Common
Leadtools.Document.Sdk
If local DLL references are used, the following DLLs are needed. The DLLs are located at <INSTALL_DIR>\LEADTOOLS21\Bin\Dotnet4\x64
:
Leadtools.dll
Leadtools.Codecs.dll
Leadtools.Codecs.Cmp.dll
Leadtools.Document.Writer.dll
Leadtools.Forms.Commands.dll
Leadtools.Ocr.dll
Leadtools.Ocr.LEADEngine
For a complete list of which Codec DLLs are required for specific formats, refer to File Format Support.
The License unlocks the features needed for the project. It must be set before any toolkit function is called. For details, including tutorials for different platforms, refer to Setting a Runtime License.
There are two types of runtime licenses:
Note
Adding LEADTOOLS NuGet and local references and setting a license are covered in more detail in the Add References and Set a License tutorial.
With the project created, the references added, and the license set, coding can begin.
In the Solution Explorer, open Program.cs
. Add the following statements to the using block at the top.
// Using block at the top
using System;
using System.IO;
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms.Commands;
using Leadtools.Ocr;
Add a new method called ExtractMRTD(RasterImage image)
then call it inside the Main
method. Add the below MRTD detection and recognition code inside the new method. The method's parameter will be the RasterImage loaded in RasterImage image = LoadImage(@"C:\LEADTOOLS21\Resources\Images\mrz_sample.jpg");
. For this tutorial use this MRTD sample image.
// Main method
static void Main(string[] args)
{
SetLicense();
RasterImage image = LoadImage(@"C:\LEADTOOLS21\Resources\Images\mrz_sample.jpg");
ExtractMRTD(image);
}
static RasterImage LoadImage(string filename)
{
using (RasterCodecs codecs = new RasterCodecs())
return codecs.Load(filename);
}
static void ExtractMRTD(RasterImage image)
{
MRTDReader mrtdReader = new MRTDReader();
// Create the OCR Engine
using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD))
{
ocrEngine.Startup(null, null, null, @"C:\LEADTOOLS21\Bin\Common\OcrLEADRuntime");
mrtdReader.OcrEngine = ocrEngine;
// Process Image
mrtdReader.ProcessImage(image);
// Output values
if (mrtdReader.Errors == MRTDErrors.NoError)
{
foreach (var value in mrtdReader.Results)
{
Console.WriteLine(string.Format("Data Element Field: {0}", value.Key.ToString()));
Console.WriteLine(string.Format("Data Element Value: {0}", value.Value.ReadableValue));
Console.WriteLine(string.Format("Data Element Code : {0}", value.Value.MrzCharacters));
Console.WriteLine(string.Format("Data Element Valid: {0}", value.Value.IsValid.ToString()));
Console.WriteLine("************************************");
}
}
}
}
Run the project by pressing F5, or by selecting Debug -> Start Debugging.
If the steps were followed correctly, the application runs and displays the passport image's MRTD information.
This tutorial showed how to load an image and run MICR recognition. Also it covered how to use the MRTDReader
class.