BarcodeMicroQRReaderGetBarcodeSkewAngle Method (GdPictureImaging)

In This Topic

Returns the angle of a barcode detected by the BarcodeMicroQRReaderDoScan method.

Syntax

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

'Declaration
 
Public Function BarcodeMicroQRReaderGetBarcodeSkewAngle( _
   ByVal BarcodeNo As Integer _
) As Double

public double BarcodeMicroQRReaderGetBarcodeSkewAngle( 
   int BarcodeNo
)

public function BarcodeMicroQRReaderGetBarcodeSkewAngle( 
    BarcodeNo: Integer
): Double;

public function BarcodeMicroQRReaderGetBarcodeSkewAngle( 
   BarcodeNo : int
) : double;

public: double BarcodeMicroQRReaderGetBarcodeSkewAngle( 
   int BarcodeNo
)

public:
double BarcodeMicroQRReaderGetBarcodeSkewAngle( 
   int BarcodeNo
)

Parameters

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

Return Value

The barcode angle in degrees. The angle is measured clockwise relative to the horizontal axis of the image.

Remarks

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

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);
 
    // Set to 0, so all the Micro 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 Micro Qr Code scanning process and write info into a text file.
    gdpictureImaging.BarcodeMicroQRReaderDoScan(imageID, mode, expectedBarcodes);
 
    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