BarcodePDF417ReaderGetBarcodeY3 Method (GdPictureImaging)

In This Topic

Returns the Y position (in pixels) of the bottom-left corner of a barcode detected by the BarcodePDF417ReaderDoScan method. If ROI has been set, this coordinate is relative to the used ROI.

Syntax

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

'Declaration
 
Public Function BarcodePDF417ReaderGetBarcodeY3( _
   ByVal BarcodeNo As Integer _
) As Integer

public int BarcodePDF417ReaderGetBarcodeY3( 
   int BarcodeNo
)

public function BarcodePDF417ReaderGetBarcodeY3( 
    BarcodeNo: Integer
): Integer;

public function BarcodePDF417ReaderGetBarcodeY3( 
   BarcodeNo : int
) : int;

public: int BarcodePDF417ReaderGetBarcodeY3( 
   int BarcodeNo
)

public:
int BarcodePDF417ReaderGetBarcodeY3( 
   int BarcodeNo
)

Parameters

BarcodeNo: Barcode index. Must be between 1 and BarcodePDF417ReaderGetBarcodeCount returned value.

Return Value

The barcode Y position of the bottom-left corner; relative to the ROI, if any is defined.

Remarks

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

Example

Finding PDF417 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 PDF417 barcodes in the image should be found.
    int expectedBarcodes = 0;
 
    // Perform scanning at best speed, ignoring very damaged barcodes.
    BarcodePDF417ReaderScanMode mode = BarcodePDF417ReaderScanMode.BestSpeed;
 
    // Start the PDF417 barcode scanning process and write info into a text file.
    gdpictureImaging.BarcodePDF417ReaderDoScan(imageID, mode, expectedBarcodes);
 
    using (System.IO.StreamWriter file = new System.IO.StreamWriter("PDF417.txt"))
    {
        int barcodesFound = gdpictureImaging.BarcodePDF417ReaderGetBarcodeCount();
 
        for (int i = 1; i <= barcodesFound; i++)
        {
            // Decoded information.
            file.WriteLine("Decoded info = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeValue(i));
 
            // The raw bytes decoded. It was post-processed to find the correct decoded info based on detected Encoding.
            file.WriteLine("Raw bytes = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeValueRAW(i));
 
            // The number of rows of the barcode.
            file.WriteLine("Rows = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeRows(i));
 
            // The number of columns of the barcode.
            file.WriteLine("Columns = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeColumns(i));
 
            // The skew angle of the barcode, in degrees.
            file.WriteLine("Skew angle = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeSkewAngle(i));
 
            // Confidence in result, in percentage (values from 0 to 100).
            file.WriteLine("Confidence = " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeConfidence(i));
 
            // The barcode position, given by the coordinates of the corners.
            file.WriteLine("Position =  Top-Left=["
                + gdpictureImaging.BarcodePDF417ReaderGetBarcodeX1(i) + ", " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeY1(i)
                + "] Top-Right=[" + gdpictureImaging.BarcodePDF417ReaderGetBarcodeX2(i) + ", " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeY2(i)
                + "] Bottom-Right=[" + gdpictureImaging.BarcodePDF417ReaderGetBarcodeX3(i) + ", " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeY3(i)
                + "] Bottom-Left=[" + gdpictureImaging.BarcodePDF417ReaderGetBarcodeX4(i) + ", " + gdpictureImaging.BarcodePDF417ReaderGetBarcodeY4(i) + "]");
        }
    }
 
    // Release used resources.
    gdpictureImaging.BarcodePDF417ReaderClear();
    gdpictureImaging.ReleaseGdPictureImage(imageID);
}

Reference

GdPictureImaging Class
GdPictureImaging Members