GdPicture.NET Reference Guide
BarcodeDataMatrixReaderGetBarcodeX4 Method (GdPictureImaging)
Example 





GdPicture14 Namespace > GdPictureImaging Class : BarcodeDataMatrixReaderGetBarcodeX4 Method
Barcode index. Must be between 1 and BarcodeDataMatrixReaderGetBarcodeCount returned value.
Returns the X position (in pixels) of the bottom-right corner of a barcode detected by the BarcodeDataMatrixReaderDoScan method. If ROI has been set, this coordinate is relative to the used ROI.
Syntax
'Declaration
 
Public Function BarcodeDataMatrixReaderGetBarcodeX4( _
   ByVal BarcodeNo As Integer _
) As Integer
public int BarcodeDataMatrixReaderGetBarcodeX4( 
   int BarcodeNo
)
public function BarcodeDataMatrixReaderGetBarcodeX4( 
    BarcodeNo: Integer
): Integer; 
public function BarcodeDataMatrixReaderGetBarcodeX4( 
   BarcodeNo : int
) : int;
public: int BarcodeDataMatrixReaderGetBarcodeX4( 
   int BarcodeNo
) 
public:
int BarcodeDataMatrixReaderGetBarcodeX4( 
   int BarcodeNo
) 

Parameters

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

Return Value

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

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

Example
Detecting all DataMatrix 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.BarcodeDataMatrixReaderDoScan(ImageID) = GdPictureStatus.OK Then 'Start DataMatrix barcode scanning process
      Dim BarcodeCount As Integer = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeCount
      If BarcodeCount > 0 Then
         For i As Integer = 1 To BarcodeCount
            MessageBox.show("Barcode No: " & Str(i))
            MessageBox.show("Value: " & oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeValue(i))
            MessageBox.show("Rows: " & Str(oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeRows(i)))
            MessageBox.show("Columns: " & Str(oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeColumns(i)))
            MessageBox.show("Columns: " & Str(oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeSkewAngle(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.BarcodeDataMatrixReaderGetBarcodeCount
            X1 = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeX1(i) + LeftArea
            X2 = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeX2(i) + LeftArea
            X3 = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeX3(i) + LeftArea
            X4 = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeX4(i) + LeftArea
            Y1 = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeY1(i) + TopArea
            Y2 = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeY2(i) + TopArea
            Y3 = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeY3(i) + TopArea
            Y4 = oGdPictureImaging.BarcodeDataMatrixReaderGetBarcodeY4(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.BarcodeDataMatrixReaderClear() 'Release detection info from memory
   End If
   oGdPictureImaging.ReleaseGdPictureImage(ImageID)
End If
See Also

Reference

GdPictureImaging Class
GdPictureImaging Members