BarcodeMicroQRReaderDoScan(Int32) Method

In This Topic

Starts a barcode recognition process on a specified GdPicture image or on an area of a specified GdPicture image defined by the SetROI method.

Syntax

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

'Declaration
 
Public Overloads Function BarcodeMicroQRReaderDoScan( _
   ByVal ImageID As Integer _
) As GdPictureStatus

public GdPictureStatus BarcodeMicroQRReaderDoScan( 
   int ImageID
)

public function BarcodeMicroQRReaderDoScan( 
    ImageID: Integer
): GdPictureStatus;

public function BarcodeMicroQRReaderDoScan( 
   ImageID : int
) : GdPictureStatus;

public: GdPictureStatus BarcodeMicroQRReaderDoScan( 
   int ImageID
)

public:
GdPictureStatus BarcodeMicroQRReaderDoScan( 
   int ImageID
)

Parameters

ImageID: A unique image identifier of the GdPicture image representing the image in use.

Return Value

A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK. We strongly recommend always checking this status first.

Remarks

This method uses the best quality mode for scanning and will try to detect all available barcodes. You can use the BarcodeMicroQRReaderDoScan(Int32,BarcodeQRReaderScanMode,Int32,Boolean) method and set the ExpectedCount parameter to 1 and bool StopOnExpectedCount to true, to stop the recognition process after the first barcode was found.

For more details, please refer to our Barcode Recognition Sample included in the installation folder that demonstrates the usage of this method.

Example

Finding Micro Qr Code barcodes in an image and writing complete barcodes info into a file.

using (GdPictureImaging gdpictureImaging = new GdPictureImaging())
{
    int imageID = gdpictureImaging.CreateGdPictureImageFromFile("image.jpg", false);
 
    // Start the Micro Qr Code barcode scanning process using the best quality mode and stop the process after the first Micro Qr Code barcode is found.
    gdpictureImaging.BarcodeMicroQRReaderDoScan(imageID);
 
    // Write all available info into a text file.
    using (System.IO.StreamWriter file = new System.IO.StreamWriter("MicroQrCodes.txt"))
    {
        int barcodesFound = gdpictureImaging.BarcodeMicroQRReaderGetBarcodeCount();
 
        for (int i = 1; i <= barcodesFound; i++)
        {
            // Decoded information.
            file.WriteLine("Decoded info = " + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeValue(i));
 
            // The skew angle of the barcode, in degrees.
            file.WriteLine("Skew angle = " + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeSkewAngle(i));
 
            // Confidence in result, in percentage (values from 0 to 100).
            file.WriteLine("Confidence = " + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeConfidence(i));
 
            // The version of a Micro Qr Code, in range 1-4. The higher the version, the larger the barcode is.
            file.WriteLine("Version = " + gdpictureImaging.BarcodeMicroQRReaderGetVersion(i));
 
            // The barcode position, given by the coordinates of the corners.
            file.WriteLine("Position =  Top-Left=["
                + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeX1(i) + ", " + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeY1(i)
                + "] Top-Right=[" + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeX2(i) + ", " + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeY2(i)
                + "] Bottom-Right=[" + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeX3(i) + ", " + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeY3(i)
                + "] Bottom-Left=[" + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeX4(i) + ", " + gdpictureImaging.BarcodeMicroQRReaderGetBarcodeY4(i) + "]");
        }
    }
 
    // Release used resources.
    gdpictureImaging.BarcodeMicroQRReaderClear();
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members
Overload List
SetROI Method