BarcodeQRReaderGetBarcodeValue Method (GdPictureImaging)

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Function BarcodeQRReaderGetBarcodeValue( _
   ByVal BarcodeNo As Integer _
) As String

public string BarcodeQRReaderGetBarcodeValue( 
   int BarcodeNo
)

public function BarcodeQRReaderGetBarcodeValue( 
    BarcodeNo: Integer
): String;

public function BarcodeQRReaderGetBarcodeValue( 
   BarcodeNo : int
) : String;

public: string* BarcodeQRReaderGetBarcodeValue( 
   int BarcodeNo
)

public:
String^ BarcodeQRReaderGetBarcodeValue( 
   int BarcodeNo
)

Parameters

BarcodeNo: Barcode index. Must be between 1 and BarcodeQRReaderGetBarcodeCount returned value.

Return Value

The barcode data.

This method is used in the "Barcode Recognition" Demo.

Finding QrCodes in an image and writeing complete barcodes info into a file.

C#

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false);
 
    // Set to 0, so all the QR Codes in the image should be found.
    int expectedBarcodes = 0;
 
    // Perform scanning at best speed, ignoring very damaged barcodes.
    BarcodeQRReaderScanMode mode = BarcodeQRReaderScanMode.BestSpeed;
 
    // Start the QrCode scanning process and write complete info into a text file.
    gdpictureImaging.BarcodeQRReaderDoScan(imageID, mode, expectedBarcodes);
 
    using (System.IO.StreamWriter file = new System.IO.StreamWriter("QrCodes.txt"))
    {
        int barcodesFound = gdpictureImaging.BarcodeQRReaderGetBarcodeCount();
 
        for (int i = 1; i <= barcodesFound; i++)
        {
            // Decoded information.
            file.WriteLine("Decoded info = " + gdpictureImaging.BarcodeQRReaderGetBarcodeValue(i));
 
            // Confidence in result, in percentage (values from 0 to 100).
            file.WriteLine("Confidence = " + gdpictureImaging.BarcodeQRReaderGetBarcodeConfidence(i));
 
            // The version of a Qr Code, in range 0-40. The higher the version, the larger the barcode is.
            file.WriteLine("Version = " + gdpictureImaging.BarcodeQRReaderGetVersion(i));
 
            // The skew angle of the barcode, in degrees.
            file.WriteLine("Skew angle = " + gdpictureImaging.BarcodeQRReaderGetBarcodeSkewAngle(i));
 
            // The raw bytes decoded. It was post-processed to find the correct decoded info based on detected Encoding.
            file.WriteLine("Raw bytes = " + gdpictureImaging.BarcodeQRReaderGetBarcodeValueRAW(i));
 
            // The barcode position, given by the coordinates of the corners.
            file.WriteLine("Position =  Top-Left=["
                + gdpictureImaging.BarcodeQRReaderGetBarcodeX1(i) + ", " + gdpictureImaging.BarcodeQRReaderGetBarcodeY1(i)
                + "] Top-Right=[" + gdpictureImaging.BarcodeQRReaderGetBarcodeX2(i) + ", " + gdpictureImaging.BarcodeQRReaderGetBarcodeY2(i)
                + "] Bottom-Right=[" + gdpictureImaging.BarcodeQRReaderGetBarcodeX3(i) + ", " + gdpictureImaging.BarcodeQRReaderGetBarcodeY3(i)
                + "] Bottom-Left=[" + gdpictureImaging.BarcodeQRReaderGetBarcodeX4(i) + ", " + gdpictureImaging.BarcodeQRReaderGetBarcodeY4(i) + "]");
        }
    }
 
    // Release used resources.
    gdpictureImaging.BarcodeQRReaderClear();
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members