Тесты печати качества штрих-кодов

В этом разделе

SDK содержит тесты, которые позволяют определить качество печати 1D линейных штрих-кодов, 2D матричных штрих-кодов (Aztec, DataMatrix, Han Xin Code, QR Code, Micro QR Code) и 2D многострочных штрих-кодов с возможностью перекрестного сканирования (PDF417, PDF417Compact, MicroPDF417).

Для проверки качества печати 1D линейных штрих-кодов необходимо использовать класс Vintasoft.Barcode.QualityTests.ISO15416QualityTest.
Алгоритм теста основан на стандарте ISO/IEC 15416. Тест позволяет оценить качество печати штрих-кода по следующим параметрам: Decode, Max Reflectance (Rmax), Min Reflectance (Rmin), Symbol Contrast (SC), Min Edge Contrast (ECmin), Modulation (MOD), Max Element Reflectance Non-uniformity (ERNmax), Defects, Decodability.

Вот пример, показывающий, как проверить качество печати 1D штрих-кодов:

using System;

using Vintasoft.Imaging;

using Vintasoft.Barcode;
using Vintasoft.Barcode.BarcodeInfo;
using Vintasoft.Barcode.QualityTests;

/// <summary>
/// Test that shows how to test the print quality of 1D barcodes.
/// </summary>
class ISO15416QualityTestExample
{

    /// <summary>
    /// Runs the test.
    /// </summary>
    public static void Test()
    {
        // load image with barcode from file
        using (VintasoftBitmap barcodeImage = ImageCodecs.Default.Decode("test1.jpg"))
        {
            // read barcodes from image and test the print quality of 1D barcodes
            ReadBarcodesAndTestBarcodePrintQuality(barcodeImage);
        }
    }
    
    /// <summary>
    /// Reads barcodes from image and tests the print quality of 1D barcodes.
    /// </summary>
    static void ReadBarcodesAndTestBarcodePrintQuality(VintasoftBitmap imageWithBarcodes)
    {
        // create the barcode reader
        using (BarcodeReader reader = new BarcodeReader())
        {
            // specify that reader must collect information for quality test
            reader.Settings.CollectTestInformation = true;

            // specify that reader must search for Code39 and Code128 barcodes only
            reader.Settings.ScanBarcodeTypes = BarcodeType.Code39 | BarcodeType.Code128;

            // read barcodes
            IBarcodeInfo[] barcodeInfos = reader.ReadBarcodes(imageWithBarcodes);

            // for each found barcode
            for (int i = 0; i < barcodeInfos.Length; i++)
            {
                // test print quality of barcode using ISO 15416 test
                ISO15416QualityTest test =
                    new ISO15416QualityTest((BarcodeInfo1D)barcodeInfos[i], imageWithBarcodes);

                // print results of ISO 15416 test

                Console.WriteLine(string.Format("[{0}] {1}",
                    barcodeInfos[i].BarcodeType, barcodeInfos[i].Value));
                Console.WriteLine(string.Format("Overall symbol grade:            {0} ({1:f2})",
                    test.OverallSymbolGrade, test.OverallSymbolGradeValue));
                if (test.DifferentDecodedValues)
                    Console.WriteLine("Scan profiles has different barcode decode values!");
                if (test.SymbolComponentQualityTests.Length == 1)
                {
                    ISO15416SymbolComponentQualityTest qualityTest = test.SymbolComponentQualityTests[0];
                    Console.WriteLine(string.Format("Scan reflectance profiles:       {0}",
                        qualityTest.ScanReflectanceProfiles.Length));
                    Console.WriteLine("Scan reflectance profile grades:");
                    for (int j = 0; j < qualityTest.ScanReflectanceProfiles.Length; j++)
                        Console.Write(qualityTest.ScanReflectanceProfiles[j].ScanGrade);
                }
                else
                {
                    for (int k = 0; k < test.SymbolComponentQualityTests.Length; k++)
                    {
                        Console.WriteLine(string.Format("Symbol component:                {0}", k + 1));
                        ISO15416SymbolComponentQualityTest qualityTest = test.SymbolComponentQualityTests[k];
                        Console.WriteLine(string.Format("Scan reflectance profiles:       {0}",
                            qualityTest.ScanReflectanceProfiles.Length));
                        Console.WriteLine("Scan reflectance profile grades:");
                        for (int j = 0; j < qualityTest.ScanReflectanceProfiles.Length; j++)
                            Console.Write(qualityTest.ScanReflectanceProfiles[j].ScanGrade);
                    }
                }
                Console.WriteLine();
                Console.WriteLine();
            }
        }
    }

}

VB.NET


Imports Vintasoft.Imaging

Imports Vintasoft.Barcode
Imports Vintasoft.Barcode.BarcodeInfo
Imports Vintasoft.Barcode.QualityTests

''' <summary>
''' Test that shows how to test the print quality of 1D barcodes.
''' </summary>
Class ISO15416QualityTestExample

    ''' <summary>
    ''' Runs the test.
    ''' </summary>
    Public Shared Sub Test()
        ' load image with barcode from file
        Using barcodeImage As VintasoftBitmap = ImageCodecs.[Default].Decode("test1.jpg")
            ' read barcodes from image and test the print quality of 1D barcodes
            ReadBarcodesAndTestBarcodePrintQuality(barcodeImage)
        End Using
    End Sub

    ''' <summary>
    ''' Reads barcodes from image and tests the print quality of 1D barcodes.
    ''' </summary>
    Private Shared Sub ReadBarcodesAndTestBarcodePrintQuality(imageWithBarcodes As VintasoftBitmap)
        ' create the barcode reader
        Using reader As New BarcodeReader()
            ' specify that reader must collect information for quality test
            reader.Settings.CollectTestInformation = True

            ' specify that reader must search for Code39 and Code128 barcodes only
            reader.Settings.ScanBarcodeTypes = BarcodeType.Code39 Or BarcodeType.Code128

            ' read barcodes
            Dim barcodeInfos As IBarcodeInfo() = reader.ReadBarcodes(imageWithBarcodes)

            ' for each found barcode
            For i As Integer = 0 To barcodeInfos.Length - 1
                ' test print quality of barcode using ISO 15416 test
                Dim test As New ISO15416QualityTest(DirectCast(barcodeInfos(i), BarcodeInfo1D), imageWithBarcodes)

                ' print results of ISO 15416 test

                Console.WriteLine(String.Format("[{0}] {1}", barcodeInfos(i).BarcodeType, barcodeInfos(i).Value))
                Console.WriteLine(String.Format("Overall symbol grade:            {0} ({1:f2})", test.OverallSymbolGrade, test.OverallSymbolGradeValue))
                If test.DifferentDecodedValues Then
                    Console.WriteLine("Scan profiles has different barcode decode values!")
                End If
                If test.SymbolComponentQualityTests.Length = 1 Then
                    Dim qualityTest As ISO15416SymbolComponentQualityTest = test.SymbolComponentQualityTests(0)
                    Console.WriteLine(String.Format("Scan reflectance profiles:       {0}", qualityTest.ScanReflectanceProfiles.Length))
                    Console.WriteLine("Scan reflectance profile grades:")
                    For j As Integer = 0 To qualityTest.ScanReflectanceProfiles.Length - 1
                        Console.Write(qualityTest.ScanReflectanceProfiles(j).ScanGrade)
                    Next
                Else
                    For k As Integer = 0 To test.SymbolComponentQualityTests.Length - 1
                        Console.WriteLine(String.Format("Symbol component:                {0}", k + 1))
                        Dim qualityTest As ISO15416SymbolComponentQualityTest = test.SymbolComponentQualityTests(k)
                        Console.WriteLine(String.Format("Scan reflectance profiles:       {0}", qualityTest.ScanReflectanceProfiles.Length))
                        Console.WriteLine("Scan reflectance profile grades:")
                        For j As Integer = 0 To qualityTest.ScanReflectanceProfiles.Length - 1
                            Console.Write(qualityTest.ScanReflectanceProfiles(j).ScanGrade)
                        Next
                    Next
                End If
                Console.WriteLine()
                Console.WriteLine()
            Next
        End Using
    End Sub

End Class

Для проверки качества печати двухмерных матричных штрих-кодов (Aztec, DataMatrix, Han Xin Code, QR Code, Micro QR Code) необходимо использовать класс Vintasoft.Barcode.QualityTests.ISO15415QualityTest.
Алгоритм теста основан на стандарте ISO/IEC 15415. Тест позволяет оценить качество печати штрих-кода по следующим параметрам: Decode, Max Reflectance (Rmax), Min Reflectance (Rmin), Symbol Contrast (SC), Modulation (MOD), Reflectance Margin, Fixed Pattern Damage, Axial Nonuniformity, Grid Nonuniformity, Unused Error Correction (UEC), Quiet Zone, Additional Grades, Distortion Angle.

Дополнительные оценки для штрих-кода Data Matrix (определены в ISO 16022, Приложение M): FixedPatternDamage.L1, FixedPatternDamage.L2, FixedPatternDamage.QZL1, FixedPatternDamage.QZL2, FixedPatternDamage.Segment_X_Y_Top, FixedPatternDamage.Segment_X_Y_Right, FixedPatternDamage.ClockAndSolidArea, FixedPatternDamage.AG.

Вот пример, который показывает, как проверить качество печати 2D матричных штрих-кодов (Aztec, DataMatrix, Han Xin Code, QR Code, Micro QR Code):

using System;

using Vintasoft.Imaging;

using Vintasoft.Barcode;
using Vintasoft.Barcode.BarcodeInfo;
using Vintasoft.Barcode.QualityTests;

/// <summary>
/// Test that shows how to test the print quality of matrix 2D barcodes
/// (Aztec, DataMatrix, Han Xin Code, QR and MicroQR).
/// </summary>
class ISO15415QualityTestMatrixExample
{

    /// <summary>
    /// Runs the test.
    /// </summary>
    public static void Test()
    {
        // load image with barcode from file
        using (VintasoftBitmap barcodeImage = ImageCodecs.Default.Decode("test1.jpg"))
        {
            // read barcodes from image and test the print quality of 2D barcodes
            ReadBarcodesAndTestBarcodePrintQuality(barcodeImage);
        }
    }
    
    /// <summary>
    /// Reads barcodes from image and tests the print quality of 2D barcodes.
    /// </summary>
    public static void ReadBarcodesAndTestBarcodePrintQuality(VintasoftBitmap imageWithBarcodes)
    {
        // create the barcode reader
        using (BarcodeReader reader = new BarcodeReader())
        {
            // specify that reader must collect information for quality test
            reader.Settings.CollectTestInformation = true;

            // specify that reader must search for Aztec, DataMatrix, Han Xin Code, QR and MicroQR barcodes only
            reader.Settings.ScanBarcodeTypes = 
                BarcodeType.Aztec | BarcodeType.DataMatrix |
                BarcodeType.QR | BarcodeType.MicroQR | BarcodeType.HanXinCode;
            
            // read barcodes
            IBarcodeInfo[] barcodeInfos = reader.ReadBarcodes(imageWithBarcodes);
            
            // for each found barcode
            for (int i = 0; i < barcodeInfos.Length; i++)
            {
                // test print quality of barcode using ISO 15415 test
                ISO15415QualityTest test = new ISO15415QualityTest();
                test.CalculateGrades((BarcodeInfo2D)barcodeInfos[i], imageWithBarcodes);

                // print results of ISO 15415 test

                Console.WriteLine(string.Format("[{0}] {1}",
                    barcodeInfos[i].BarcodeType, barcodeInfos[i].Value));
                Console.WriteLine(string.Format("Decode                                  : {0}",
                    GradeToString(test.DecodeGrade)));
                Console.WriteLine(string.Format("Unused error correction                 : {0} ({1}%)",
                    GradeToString(test.UnusedErrorCorrectionGrade), test.UnusedErrorCorrection));
                Console.WriteLine(string.Format("Symbol contrast                         : {0} ({1}%)",
                    GradeToString(test.SymbolContrastGrade), test.SymbolContrast));
                Console.WriteLine(string.Format("Axial nonuniformity                     : {0} ({1})",
                    GradeToString(test.AxialNonuniformityGrade), test.AxialNonuniformity));
                Console.WriteLine(string.Format("Grid nonuniformity                      : {0} ({1} cell)",
                    GradeToString(test.GridNonuniformityGrade), test.GridNonuniformity));
                Console.WriteLine(string.Format("Modulation                              : {0}",
                    GradeToString(test.ModulationGrade)));
                Console.WriteLine(string.Format("Reflectance margin                      : {0}",
                    GradeToString(test.ReflectanceMarginGrade)));
                Console.WriteLine(string.Format("Fixed pattern damage                    : {0}",
                    GradeToString(test.FixedPatternDamageGrade)));
                foreach (string name in test.AdditionalGrades.Keys)
                    Console.WriteLine(string.Format("{0}: {1}",
                        name.PadRight(40, ' '), GradeToString(test.AdditionalGrades[name])));
                if (test.QuietZone >= 0)
                    Console.WriteLine(string.Format("Quiet zone                              : {0} ({1} %)",
                        GradeToString(test.QuietZoneGrade), test.QuietZone));
                Console.WriteLine(string.Format("Distortion angle (informative)          : {0}°",
                    test.DistortionAngle));
                Console.WriteLine(string.Format("-------------Scan grade                 : {0}",
                    GradeToString(test.ScanGrade)));
                Console.WriteLine();
            }
        }
    }

    /// <summary>
    /// Converts ISO15415 quality grade into string value.
    /// </summary>
    static string GradeToString(ISO15415QualityGrade grade)
    {
        return string.Format("{0}({1})", ((int)grade).ToString(), grade);
    }

}

VB.NET


Imports Vintasoft.Imaging

Imports Vintasoft.Barcode
Imports Vintasoft.Barcode.BarcodeInfo
Imports Vintasoft.Barcode.QualityTests

''' <summary>
''' Test that shows how to test the print quality of matrix 2D barcodes
''' (Aztec, DataMatrix, Han Xin Code, QR and MicroQR).
''' </summary>
Class ISO15415QualityTestMatrixExample

    ''' <summary>
    ''' Runs the test.
    ''' </summary>
    Public Shared Sub Test()
        ' load image with barcode from file
        Using barcodeImage As VintasoftBitmap = ImageCodecs.[Default].Decode("test1.jpg")
            ' read barcodes from image and test the print quality of 2D barcodes
            ReadBarcodesAndTestBarcodePrintQuality(barcodeImage)
        End Using
    End Sub

    ''' <summary>
    ''' Reads barcodes from image and tests the print quality of 2D barcodes.
    ''' </summary>
    Public Shared Sub ReadBarcodesAndTestBarcodePrintQuality(imageWithBarcodes As VintasoftBitmap)
        ' create the barcode reader
        Using reader As New BarcodeReader()
            ' specify that reader must collect information for quality test
            reader.Settings.CollectTestInformation = True

            ' specify that reader must search for Aztec, DataMatrix, Han Xin Code, QR and MicroQR barcodes only
            reader.Settings.ScanBarcodeTypes = BarcodeType.Aztec Or BarcodeType.DataMatrix Or BarcodeType.QR Or BarcodeType.MicroQR Or BarcodeType.HanXinCode

            ' read barcodes
            Dim barcodeInfos As IBarcodeInfo() = reader.ReadBarcodes(imageWithBarcodes)

            ' for each found barcode
            For i As Integer = 0 To barcodeInfos.Length - 1
                ' test print quality of barcode using ISO 15415 test
                Dim test As New ISO15415QualityTest()
                test.CalculateGrades(DirectCast(barcodeInfos(i), BarcodeInfo2D), imageWithBarcodes)

                ' print results of ISO 15415 test

                Console.WriteLine(String.Format("[{0}] {1}", barcodeInfos(i).BarcodeType, barcodeInfos(i).Value))
                Console.WriteLine(String.Format("Decode                                  : {0}", GradeToString(test.DecodeGrade)))
                Console.WriteLine(String.Format("Unused error correction                 : {0} ({1}%)", GradeToString(test.UnusedErrorCorrectionGrade), test.UnusedErrorCorrection))
                Console.WriteLine(String.Format("Symbol contrast                         : {0} ({1}%)", GradeToString(test.SymbolContrastGrade), test.SymbolContrast))
                Console.WriteLine(String.Format("Axial nonuniformity                     : {0} ({1})", GradeToString(test.AxialNonuniformityGrade), test.AxialNonuniformity))
                Console.WriteLine(String.Format("Grid nonuniformity                      : {0} ({1} cell)", GradeToString(test.GridNonuniformityGrade), test.GridNonuniformity))
                Console.WriteLine(String.Format("Modulation                              : {0}", GradeToString(test.ModulationGrade)))
                Console.WriteLine(String.Format("Reflectance margin                      : {0}", GradeToString(test.ReflectanceMarginGrade)))
                Console.WriteLine(String.Format("Fixed pattern damage                    : {0}", GradeToString(test.FixedPatternDamageGrade)))
                For Each name As String In test.AdditionalGrades.Keys
                    Console.WriteLine(String.Format("{0}: {1}", name.PadRight(40, " "C), GradeToString(test.AdditionalGrades(name))))
                Next
                If test.QuietZone >= 0 Then
                    Console.WriteLine(String.Format("Quiet zone                              : {0} ({1} %)", GradeToString(test.QuietZoneGrade), test.QuietZone))
                End If
                Console.WriteLine(String.Format("Distortion angle (informative)          : {0}�", test.DistortionAngle))
                Console.WriteLine(String.Format("-------------Scan grade                 : {0}", GradeToString(test.ScanGrade)))
                Console.WriteLine()
            Next
        End Using
    End Sub

    ''' <summary>
    ''' Converts ISO15415 quality grade into string value.
    ''' </summary>
    Private Shared Function GradeToString(grade As ISO15415QualityGrade) As String
        Return String.Format("{0}({1})", CInt(grade).ToString(), grade)
    End Function

End Class

Для проверки качества печати двумерных многострочных штрих-кодов с возможностью перекрестного сканирования (PDF417, PDF417Compact, MicroPDF417) необходимо использовать класс Vintasoft.Barcode.QualityTests.ISO15415QualityTest.
Алгоритм теста основан на стандарте ISO/IEC 15415. Тест позволяет оценить качество печати штрих-кода по следующим параметрам: Decode, ISO15416 Start/RAP (Raw Address Pattern) pattern test, ISO15416 Center (RAP) pattern test (MicroPDF417), ISO15416 Stop/RAP pattern test, Unused Error Correction (UEC), Codeword Yield, Codeword Print Quality, Quiet Zone, Distortion Angle.

Вот пример, показывающий, как проверить качество печати 2D многострочных штрих-кодов с возможностью перекрестного сканирования (PDF417, PDF417Compact, MicroPDF417):

using System;

using Vintasoft.Imaging;

using Vintasoft.Barcode;
using Vintasoft.Barcode.BarcodeInfo;
using Vintasoft.Barcode.QualityTests;

/// <summary>
/// Test that shows how to test the print quality of multi-row 2D barcodes
/// (PDF417, PDF417Compact and MicroPDF417).
/// </summary>
class ISO15415QualityTestMultiRowExample
{

    /// <summary>
    /// Runs the test.
    /// </summary>
    public static void Test()
    {
        // load image with barcode from file
        using (VintasoftBitmap barcodeImage = ImageCodecs.Default.Decode("test1.jpg"))
        {
            // read barcodes from image and test the print quality of 2D barcodes
            ReadBarcodesAndTestBarcodePrintQuality(barcodeImage);
        }
    }
    
    /// <summary>
    /// Reads barcodes from image and tests the print quality of 2D barcodes.
    /// </summary>
    /// <param name="imageWithBarcodes"></param>
    public static void ReadBarcodesAndTestBarcodePrintQuality(VintasoftBitmap imageWithBarcodes)
    {
        // create the barcode reader
        using (BarcodeReader reader = new BarcodeReader())
        {
            // specify that reader must collect information for quality test
            reader.Settings.CollectTestInformation = true;

            // specify that reader must search for PDF417, PDF417Compact and MicroPDF417 barcodes only
            reader.Settings.ScanBarcodeTypes =
                BarcodeType.PDF417 | BarcodeType.PDF417Compact | BarcodeType.MicroPDF417;

            // read barcodes
            IBarcodeInfo[] barcodeInfos = reader.ReadBarcodes(imageWithBarcodes);

            // for each found barcode
            for (int i = 0; i < barcodeInfos.Length; i++)
            {
                // test print quality of barcode using ISO 15415 test
                ISO15415QualityTest test = new ISO15415QualityTest();
                test.CalculateGrades((BarcodeInfo2D)barcodeInfos[i], imageWithBarcodes);

                // print results of ISO 15415 test

                Console.WriteLine(string.Format("[{0}] {1}",
                    barcodeInfos[i].BarcodeType, barcodeInfos[i].Value));
                Console.WriteLine(string.Format("Decode                 : {0}",
                    GradeToString(test.DecodeGrade)));
                Console.WriteLine(string.Format("Unused error correction: {0} ({1}%)",
                    GradeToString(test.UnusedErrorCorrectionGrade), test.UnusedErrorCorrection));
                if (test.StartPatternTestGrade != ISO15415QualityGrade.Unavailable)
                    Console.WriteLine(string.Format("Start pattern test:      {0}",
                        GradeToString(test.StartPatternTestGrade), test.StartPatternTestGrade));
                if (test.CenterPatternTestGrade != ISO15415QualityGrade.Unavailable)
                    Console.WriteLine(string.Format("Center pattern test:     {0}",
                        GradeToString(test.CenterPatternTestGrade), test.CenterPatternTest));
                if (test.CenterPatternTestGrade != ISO15415QualityGrade.Unavailable)
                    Console.WriteLine(string.Format("Stop pattern test:       {0}",
                        GradeToString(test.CenterPatternTestGrade), test.CenterPatternTestGrade));
                Console.WriteLine(string.Format("Codeword yield:          {0}",
                    GradeToString(test.CodewordYieldGrade), test.CodewordYieldGrade));
                Console.WriteLine(string.Format("Codeword print quality:  {0}",
                    GradeToString(test.CodewordPrintQualityGrade), test.CodewordPrintQualityGrade));
                if (test.QuietZone >= 0)
                    Console.WriteLine(string.Format("Quiet zone:              {0} ({1} %)",
                        GradeToString(test.QuietZoneGrade), test.QuietZone));
                Console.WriteLine(string.Format("Distortion angle:        {0}°",
                    test.DistortionAngle));
                Console.WriteLine(string.Format("-------------Scan grade: {0}",
                    GradeToString(test.ScanGrade)));
                Console.WriteLine();
            }
        }
    }

    /// <summary>
    /// Converts ISO15415 quality grade into string value.
    /// </summary>
    static string GradeToString(ISO15415QualityGrade grade)
    {
        return string.Format("{0}({1})", ((int)grade).ToString(), grade);
    }

}

VB.NET


Imports Vintasoft.Imaging

Imports Vintasoft.Barcode
Imports Vintasoft.Barcode.BarcodeInfo
Imports Vintasoft.Barcode.QualityTests

''' <summary>
''' Test that shows how to test the print quality of multi-row 2D barcodes
''' (PDF417, PDF417Compact and MicroPDF417).
''' </summary>
Class ISO15415QualityTestMultiRowExample

    ''' <summary>
    ''' Runs the test.
    ''' </summary>
    Public Shared Sub Test()
        ' load image with barcode from file
        Using barcodeImage As VintasoftBitmap = ImageCodecs.[Default].Decode("test1.jpg")
            ' read barcodes from image and test the print quality of 2D barcodes
            ReadBarcodesAndTestBarcodePrintQuality(barcodeImage)
        End Using
    End Sub

    ''' <summary>
    ''' Reads barcodes from image and tests the print quality of 2D barcodes.
    ''' </summary>
    ''' <param name="imageWithBarcodes"></param>
    Public Shared Sub ReadBarcodesAndTestBarcodePrintQuality(imageWithBarcodes As VintasoftBitmap)
        ' create the barcode reader
        Using reader As New BarcodeReader()
            ' specify that reader must collect information for quality test
            reader.Settings.CollectTestInformation = True

            ' specify that reader must search for PDF417, PDF417Compact and MicroPDF417 barcodes only
            reader.Settings.ScanBarcodeTypes = BarcodeType.PDF417 Or BarcodeType.PDF417Compact Or BarcodeType.MicroPDF417

            ' read barcodes
            Dim barcodeInfos As IBarcodeInfo() = reader.ReadBarcodes(imageWithBarcodes)

            ' for each found barcode
            For i As Integer = 0 To barcodeInfos.Length - 1
                ' test print quality of barcode using ISO 15415 test
                Dim test As New ISO15415QualityTest()
                test.CalculateGrades(DirectCast(barcodeInfos(i), BarcodeInfo2D), imageWithBarcodes)

                ' print results of ISO 15415 test

                Console.WriteLine(String.Format("[{0}] {1}", barcodeInfos(i).BarcodeType, barcodeInfos(i).Value))
                Console.WriteLine(String.Format("Decode                 : {0}", GradeToString(test.DecodeGrade)))
                Console.WriteLine(String.Format("Unused error correction: {0} ({1}%)", GradeToString(test.UnusedErrorCorrectionGrade), test.UnusedErrorCorrection))
                If test.StartPatternTestGrade <> ISO15415QualityGrade.Unavailable Then
                    Console.WriteLine(String.Format("Start pattern test:      {0}", GradeToString(test.StartPatternTestGrade), test.StartPatternTestGrade))
                End If
                If test.CenterPatternTestGrade <> ISO15415QualityGrade.Unavailable Then
                    Console.WriteLine(String.Format("Center pattern test:     {0}", GradeToString(test.CenterPatternTestGrade), test.CenterPatternTest))
                End If
                If test.CenterPatternTestGrade <> ISO15415QualityGrade.Unavailable Then
                    Console.WriteLine(String.Format("Stop pattern test:       {0}", GradeToString(test.CenterPatternTestGrade), test.CenterPatternTestGrade))
                End If
                Console.WriteLine(String.Format("Codeword yield:          {0}", GradeToString(test.CodewordYieldGrade), test.CodewordYieldGrade))
                Console.WriteLine(String.Format("Codeword print quality:  {0}", GradeToString(test.CodewordPrintQualityGrade), test.CodewordPrintQualityGrade))
                If test.QuietZone >= 0 Then
                    Console.WriteLine(String.Format("Quiet zone:              {0} ({1} %)", GradeToString(test.QuietZoneGrade), test.QuietZone))
                End If
                Console.WriteLine(String.Format("Distortion angle:        {0}�", test.DistortionAngle))
                Console.WriteLine(String.Format("-------------Scan grade: {0}", GradeToString(test.ScanGrade)))
                Console.WriteLine()
            Next
        End Using
    End Sub

    ''' <summary>
    ''' Converts ISO15415 quality grade into string value.
    ''' </summary>
    Private Shared Function GradeToString(grade As ISO15415QualityGrade) As String
        Return String.Format("{0}({1})", CInt(grade).ToString(), grade)
    End Function

End Class

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