QR Code Reading through camera in asp.net ?.

You need first to capture an image from the web cam in your ASP.NET application. The following articles show how you can do this in ASP.NET and MVC projects:
https://www.c-sharpcorner.com/article/capturing-image-from-web-cam-in-asp-net-core-mvc/
https://www.codeproject.com/Tips/528929/Capture-images-using-web-camera-in-ASP-NET-4-5

After capturing the image, you can use LEADTOOLS .NET BarcodeReader class (reader.ReadBarcode) to read QR barcodes in the image. For More details, see the following links:
https://www.leadtools.com/help/leadtools/v20/dh/ba/barcodereader.html
https://www.leadtools.com/help/leadtools/v20/dh/to/qr-code-barcodes-in-leadtools.html

For example, the following code reads all barcodes in an image using LEADTOOLS SDK:

// Get the captured image data CapturedImageNameorStream
Leadtools.Barcode.BarcodeEngine engine = new Leadtools.Barcode.BarcodeEngine();
Leadtools.Barcode.BarcodeReader reader = engine.Reader;
using (Leadtools.Codecs.RasterCodecs codecs = new Leadtools.Codecs.RasterCodecs())
{
using (Leadtools.RasterImage image = codecs.Load(CapturedImageNameorStream))
{
// Read all the barcodes in this image
Leadtools.Barcode.BarcodeData[] barcodes = reader.ReadBarcodes(image, Leadtools.LeadRect.Empty, 0, null);
// Print out the barcodes we found
// Console.WriteLine("{0} barcodes", barcodes.Length);
for (int i = 0; i < barcodes.Length; i++)
{
Leadtools.Barcode.BarcodeData barcode = barcodes[i];
//Console.WriteLine(" {0} - {1} - {2}", i + 1, barcode.Symbology, barcode.Value);
}
}
}

2 Replies

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Maen Badwan7y ago
You need first to capture an image from the web cam in your ASP.NET application. The following articles show how you can do this in ASP.NET and MVC projects:
https://www.c-sharpcorner.com/article/capturing-image-from-web-cam-in-asp-net-core-mvc/
https://www.codeproject.com/Tips/528929/Capture-images-using-web-camera-in-ASP-NET-4-5

After capturing the image, you can use LEADTOOLS .NET BarcodeReader class (reader.ReadBarcode) to read QR barcodes in the image. For More details, see the following links:
https://www.leadtools.com/help/leadtools/v20/dh/ba/barcodereader.html
https://www.leadtools.com/help/leadtools/v20/dh/to/qr-code-barcodes-in-leadtools.html

For example, the following code reads all barcodes in an image using LEADTOOLS SDK:
// Get the captured image data CapturedImageNameorStream
Leadtools.Barcode.BarcodeEngine engine = new Leadtools.Barcode.BarcodeEngine();
Leadtools.Barcode.BarcodeReader reader = engine.Reader;

using (Leadtools.Codecs.RasterCodecs codecs = new Leadtools.Codecs.RasterCodecs())
{
using (Leadtools.RasterImage image = codecs.Load(CapturedImageNameorStream))
{
   // Read all the barcodes in this image
   Leadtools.Barcode.BarcodeData[] barcodes = reader.ReadBarcodes(image, Leadtools.LeadRect.Empty, 0, null);

   // Print out the barcodes we found
   // Console.WriteLine("{0} barcodes", barcodes.Length);
   for (int i = 0; i < barcodes.Length; i++)
   {
      Leadtools.Barcode.BarcodeData barcode = barcodes[i];
      //Console.WriteLine("  {0} - {1} - {2}", i + 1, barcode.Symbology, barcode.Value);
   }
}
}
Sanwar Ranwa7y ago
Hello Karthik

Please check these Links

https://www.youtube.com/watch?v=paWr6XJ2p3A

https://www.the-qrcode-generator.com/scan

https://www.youtube.com/watch?v=sKOt8bgvDYk

https://www.codeproject.com/Articles/20574/Open-Source-QRCode-Library