Распознавание штрих-кодов в объекте System.Drawing.Bitmap

В этом разделе

Пример: Вот пример, который показывает, как распознавать штрих-коды в изображении, которое представлено объектом System.Drawing.Bitmap.

/// <summary>
/// Reads barcode from a <see cref="System.Drawing.Bitmap"/>.
/// </summary>
/// <param name="bitmap">A bitmap with barcodes.</param>
public static void ReadBarcodesFromBitmap(System.Drawing.Bitmap bitmap)
{
    // create barcode reader
    using (Vintasoft.Barcode.BarcodeReader reader = new Vintasoft.Barcode.BarcodeReader())
    {
        // specify that reader must search for Code39, Code39Extended,
        // Code128, SSCC18 and DataMatrix barcodes
        reader.Settings.ScanBarcodeTypes =
            Vintasoft.Barcode.BarcodeType.Code39 |
            Vintasoft.Barcode.BarcodeType.Code128 |
            Vintasoft.Barcode.BarcodeType.DataMatrix;
        reader.Settings.ScanBarcodeSubsets.Add(Vintasoft.Barcode.SymbologySubsets.BarcodeSymbologySubsets.Code39Extended);
        reader.Settings.ScanBarcodeSubsets.Add(Vintasoft.Barcode.SymbologySubsets.BarcodeSymbologySubsets.SSCC18);

        // read barcodes from image
        Vintasoft.Barcode.IBarcodeInfo[] infos = Vintasoft.Barcode.GdiExtensions.ReadBarcodes(reader, bitmap);

        // if barcodes are not detected
        if (infos.Length == 0)
        {
            System.Console.WriteLine("No barcodes found.");
        }
        // if barcodes are detected
        else
        {
            // get information about extracted barcodes

            System.Console.WriteLine(string.Format("{0} barcodes found:", infos.Length));
            System.Console.WriteLine();
            for (int i = 0; i < infos.Length; i++)
            {
                Vintasoft.Barcode.IBarcodeInfo info = infos[i];
                System.Console.WriteLine(string.Format("[{0}:{1}]", i + 1, info.BarcodeType));
                System.Console.WriteLine(string.Format("Value:      {0}", info.Value));
                System.Console.WriteLine(string.Format("Region:     {0}", info.Region));
                System.Console.WriteLine();
            }
        }
    }
}

VB.NET

''' <summary>
''' Reads barcode from a <see cref="System.Drawing.Bitmap"/>.
''' </summary>
''' <param name="bitmap">A bitmap with barcodes.</param>
Public Shared Sub ReadBarcodesFromBitmap(bitmap As System.Drawing.Bitmap)
    ' create barcode reader
    Using reader As New Vintasoft.Barcode.BarcodeReader()
        ' specify that reader must search for Code39, Code39Extended,
        ' Code128, SSCC18 and DataMatrix barcodes
        reader.Settings.ScanBarcodeTypes = Vintasoft.Barcode.BarcodeType.Code39 Or Vintasoft.Barcode.BarcodeType.Code128 Or Vintasoft.Barcode.BarcodeType.DataMatrix
        reader.Settings.ScanBarcodeSubsets.Add(Vintasoft.Barcode.SymbologySubsets.BarcodeSymbologySubsets.Code39Extended)
        reader.Settings.ScanBarcodeSubsets.Add(Vintasoft.Barcode.SymbologySubsets.BarcodeSymbologySubsets.SSCC18)

        ' read barcodes from image
        Dim infos As Vintasoft.Barcode.IBarcodeInfo() = Vintasoft.Barcode.GdiExtensions.ReadBarcodes(reader, bitmap)

        ' if barcodes are not detected
        If infos.Length = 0 Then
            System.Console.WriteLine("No barcodes found.")
        Else
            ' if barcodes are detected
            ' get information about extracted barcodes

            System.Console.WriteLine(String.Format("{0} barcodes found:", infos.Length))
            System.Console.WriteLine()
            For i As Integer = 0 To infos.Length - 1
                Dim info As Vintasoft.Barcode.IBarcodeInfo = infos(i)
                System.Console.WriteLine(String.Format("[{0}:{1}]", i + 1, info.BarcodeType))
                System.Console.WriteLine(String.Format("Value:      {0}", info.Value))
                System.Console.WriteLine(String.Format("Region:     {0}", info.Region))
                System.Console.WriteLine()
            Next
        End If
    End Using
End Sub

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