Imports Vintasoft.Barcode
Imports Vintasoft.Barcode.SymbologySubsets

''' <summary>
''' Test that shows how to read barcodes from image,
''' the barcode reader searches barcodes using 2 different scan intervals.
''' </summary>
Class ReadBarcodesFromImageFileExample

    ''' <summary>
    ''' Runs the test.
    ''' </summary>
    Public Shared Sub Test()
        ReadBarcodes("test1.jpg", "test2.png")
    End Sub

    ''' <summary>
    ''' Reads barcodes from images, which are stored in files.
    ''' Barcode reader will try to recognize barcodes using 2 different scan intervals.
    ''' </summary>
    Private Shared Sub ReadBarcodes(ParamArray filenames As String())
        ' create barcode reader
        Using reader As New BarcodeReader()
            ' specify that reader must search for Code39, Code39Extended,
            ' Code128, SSCC18 and DataMatrix barcodes
            reader.Settings.ScanBarcodeTypes = BarcodeType.Code39 Or BarcodeType.Code128 Or BarcodeType.DataMatrix
            reader.Settings.ScanBarcodeSubsets.Add(BarcodeSymbologySubsets.Code39Extended)
            reader.Settings.ScanBarcodeSubsets.Add(BarcodeSymbologySubsets.SSCC18)

            ' for each filename
            For Each filename As String In filenames
                Console.Write(String.Format("{0}: ", filename))

                ' set the reader image
                reader.SetImage(filename)

                ' read barcodes from image, scan interval is set to 5
                Dim infos As IBarcodeInfo() = ReadBarcodes(reader, 5)
                ' if barcodes are not found
                If infos.Length = 0 Then
                    ' read barcodes from image, scan interval is set to 1
                    infos = ReadBarcodes(reader, 1)
                End If

                ' clear reader image
                reader.ClearImage()

                ' show barcode recognition results

                If infos.Length = 0 Then
                    Console.WriteLine("No barcodes found.")
                Else
                    Console.WriteLine(String.Format("{0} barcodes found:", infos.Length))
                    Console.WriteLine()
                    For i As Integer = 0 To infos.Length - 1
                        Dim info As IBarcodeInfo = infos(i)
                        Console.WriteLine(String.Format("[{0}:{1}]", i, info.BarcodeType))
                        Console.WriteLine(String.Format("Value:      {0}", info.Value))
                        Console.WriteLine(String.Format("Confidence: {0}%", Math.Round(info.Confidence)))
                        Console.WriteLine(String.Format("Threshold:  {0}", info.Threshold))
                        Console.WriteLine(String.Format("Region:     {0}", info.Region))
                        Console.WriteLine()
                    Next
                End If
            Next
        End Using
    End Sub

    ''' <summary>
    ''' Reads barcodes from image, which is stored in barcode reader.
    ''' </summary>
    Private Shared Function ReadBarcodes(reader As BarcodeReader, scanInterval As Integer) As IBarcodeInfo()
        reader.Settings.ScanInterval = scanInterval
        Return reader.ReadBarcodes()
    End Function

End Class

using System;

using Vintasoft.Barcode;
using Vintasoft.Barcode.SymbologySubsets;

/// <summary>
/// Test that shows how to read barcodes from image,
/// the barcode reader searches barcodes using 2 different scan intervals.
/// </summary>
class ReadBarcodesFromImageFileExample
{

    /// <summary>
    /// Runs the test.
    /// </summary>
    public static void Test()
    {
        ReadBarcodes("test1.jpg", "test2.png");
    }
    
    /// <summary>
    /// Reads barcodes from images, which are stored in files.
    /// Barcode reader will try to recognize barcodes using 2 different scan intervals.
    /// </summary>
    static void ReadBarcodes(params string[] filenames)
    {
        // create barcode reader
        using (BarcodeReader reader = new BarcodeReader())
        {
            // specify that reader must search for Code39, Code39Extended,
            // Code128, SSCC18 and DataMatrix barcodes
            reader.Settings.ScanBarcodeTypes =
                BarcodeType.Code39 |
                BarcodeType.Code128 |
                BarcodeType.DataMatrix;
            reader.Settings.ScanBarcodeSubsets.Add(BarcodeSymbologySubsets.Code39Extended);
            reader.Settings.ScanBarcodeSubsets.Add(BarcodeSymbologySubsets.SSCC18);

            // for each filename
            foreach (string filename in filenames)
            {
                Console.Write(string.Format("{0}: ", filename));

                // set the reader image
                reader.SetImage(filename);

                // read barcodes from image, scan interval is set to 5
                IBarcodeInfo[] infos = ReadBarcodes(reader, 5);
                // if barcodes are not found
                if (infos.Length == 0)
                    // read barcodes from image, scan interval is set to 1
                    infos = ReadBarcodes(reader, 1);

                // clear reader image
                reader.ClearImage();

                // show barcode recognition results

                if (infos.Length == 0)
                {
                    Console.WriteLine("No barcodes found.");
                }
                else
                {
                    Console.WriteLine(string.Format("{0} barcodes found:", infos.Length));
                    Console.WriteLine();
                    for (int i = 0; i < infos.Length; i++)
                    {
                        IBarcodeInfo info = infos[i];
                        Console.WriteLine(string.Format("[{0}:{1}]", i, info.BarcodeType));
                        Console.WriteLine(string.Format("Value:      {0}", info.Value));
                        Console.WriteLine(string.Format("Confidence: {0}%", Math.Round(info.Confidence)));
                        Console.WriteLine(string.Format("Threshold:  {0}", info.Threshold));
                        Console.WriteLine(string.Format("Region:     {0}", info.Region));
                        Console.WriteLine();
                    }
                }
            }
        }
    }

    /// <summary>
    /// Reads barcodes from image, which is stored in barcode reader.
    /// </summary>
    private static IBarcodeInfo[] ReadBarcodes(BarcodeReader reader, int scanInterval)
    {
        reader.Settings.ScanInterval = scanInterval;
        return reader.ReadBarcodes();
    }

}