GdPicture.NET Reference Guide
BarcodeQRReaderGetBarcodeX1 Method (GdPictureImaging)
Example 





GdPicture14 Namespace > GdPictureImaging Class : BarcodeQRReaderGetBarcodeX1 Method
Barcode index. Must be between 1 and BarcodeQRReaderGetBarcodeCount returned value.
Returns the X position (in pixels) of the top-left corner of a barcode detected by the BarcodeQRReaderDoScan method. If ROI has been set, this coordinate is relative to the used ROI.
Syntax
'Declaration
 
Public Function BarcodeQRReaderGetBarcodeX1( _
   ByVal BarcodeNo As Integer _
) As Integer
public int BarcodeQRReaderGetBarcodeX1( 
   int BarcodeNo
)
public function BarcodeQRReaderGetBarcodeX1( 
    BarcodeNo: Integer
): Integer; 
public function BarcodeQRReaderGetBarcodeX1( 
   BarcodeNo : int
) : int;
public: int BarcodeQRReaderGetBarcodeX1( 
   int BarcodeNo
) 
public:
int BarcodeQRReaderGetBarcodeX1( 
   int BarcodeNo
) 

Parameters

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

Return Value

The barcode X position of the top-left corner; relative to the ROI, if any is defined.
Remarks

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

Example
Detecting all QR barcodes in an image and drawing a rectangle around them.
Dim oGdPictureImaging As New GdPicture.GdPictureImaging
Dim ImageID As Integer = oGdPictureImaging.CreateGdPictureImageFromFile("") 'Prompt the user to select an image
If imageId <> 0 Then
   If oGdPictureImaging.BarcodeQRReaderDoScan(ImageID) = GdPictureStatus.OK Then
      'Start QR barcode scanning process
      Dim BarcodeCount As Integer = oGdPictureImaging.BarcodeQRReaderGetBarcodeCount
      If BarcodeCount > 0 Then
         For i As Integer = 1 To BarcodeCount
            MessageBox.show("Barcode No: " & Str(i))
            MessageBox.show("Value: " & oGdPictureImaging.BarcodeQRReaderGetBarcodeValue(i))
         Next
         Dim X1, X2, X3, X4, Y1, Y2, Y3, Y4 As Integer
         'LeftArea, TopArea are coordinates used by SetROI()
         For i = 1 To oGdPictureImaging.BarcodeQRReaderGetBarcodeCount
            X1 = oGdPictureImaging.BarcodeQRReaderGetBarcodeX1(i) + LeftArea
            X2 = oGdPictureImaging.BarcodeQRReaderGetBarcodeX2(i) + LeftArea
            X3 = oGdPictureImaging.BarcodeQRReaderGetBarcodeX3(i) + LeftArea
            X4 = oGdPictureImaging.BarcodeQRReaderGetBarcodeX4(i) + LeftArea
            Y1 = oGdPictureImaging.BarcodeQRReaderGetBarcodeY1(i) + TopArea
            Y2 = oGdPictureImaging.BarcodeQRReaderGetBarcodeY2(i) + TopArea
            Y3 = oGdPictureImaging.BarcodeQRReaderGetBarcodeY3(i) + TopArea
            Y4 = oGdPictureImaging.BarcodeQRReaderGetBarcodeY4(i) + TopArea
            oGdPictureImaging.DrawLine(ImageID, X1, Y1, X2, Y2, 1, Color.Red, True)
            oGdPictureImaging.DrawLine(ImageID, X2, Y2, X3, Y3, 1, Color.Red, True)
            oGdPictureImaging.DrawLine(ImageID, X3, Y3, X4, Y4, 1, Color.Red, True)
            oGdPictureImaging.DrawLine(ImageID, X4, Y4, X1, Y1, 1, Color.Red, True)
         Next
      Else
         MessageBox.show("No barcode detected !")
      End If
      oGdPictureImaging.BarcodeQRReaderClear() 'Release detection info from memory
   End If
   oGdPictureImaging.ReleaseGdPictureImage(ImageID)
End If
See Also

Reference

GdPictureImaging Class
GdPictureImaging Members