Reference Guide
GdPicture14 Namespace / GdPictureImaging Class / BarcodeQRReaderClear Method
Example





In This Topic
    BarcodeQRReaderClear Method (GdPictureImaging)
    In This Topic
    Releases from memory all information about latest QR barcode detection.
    Syntax
    'Declaration
     
    
    Public Sub BarcodeQRReaderClear() 
    public void BarcodeQRReaderClear()
    public procedure BarcodeQRReaderClear(); 
    public function BarcodeQRReaderClear();
    public: void BarcodeQRReaderClear(); 
    public:
    void BarcodeQRReaderClear(); 
    Remarks
    This method is used in the "Barcode Recognition" Demo.
    Example
    Finding QrCodes in an image and writeing complete barcodes info into a file.
    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);
    }
    See Also