LEADTOOLS Barcode (Leadtools.Barcode assembly)

PatchCodeBarcodeReadOptions Class

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Example 







Members 
Leadtools.Barcode Namespace : PatchCodeBarcodeReadOptions Class
Contains extra options to use when reading Patch Code barcodes.
Object Model
Syntax
[TypeConverterAttribute()]
[SerializableAttribute()]
public class PatchCodeBarcodeReadOptions : BarcodeReadOptions, System.ICloneable  
'Declaration
 
<TypeConverterAttribute()>
<SerializableAttribute()>
Public Class PatchCodeBarcodeReadOptions 
   Inherits BarcodeReadOptions
   Implements System.ICloneable 
'Usage
 
Dim instance As PatchCodeBarcodeReadOptions
public sealed class PatchCodeBarcodeReadOptions : System.ICloneable  
@interface LTPatchCodeBarcodeReadOptions : LTBarcodeReadOptions

public class PatchCodeBarcodeReadOptions extends BarcodeReadOptions

function Leadtools.Barcode.PatchCodeBarcodeReadOptions()
[TypeConverterAttribute()]
[SerializableAttribute()]
public ref class PatchCodeBarcodeReadOptions : public BarcodeReadOptions, System.ICloneable 
Remarks

The PatchCodeBarcodeReadOptions class is used to control the options when reading Patch Code barcodes using LEADTOOLS. Set the options in two ways:

The BarcodeReader class contains default options for each barcode symbology (or group of common symbologies). These options can be retrieved using the BarcodeReader.GetDefaultOptions method passing one of the following:

Then change the members of the returned PatchCodeBarcodeReadOptions by casting it from BarcodeReadOptions to PatchCodeBarcodeReadOptions.

Also create an instance of the PatchCodeBarcodeReadOptions class and use it directly in the BarcodeReader.ReadBarcode and BarcodeReader.ReadBarcodes methods that accepts a single or array of options as an input parameter.

The base BarcodeReadOptions contains the following members and features:

Member Description
BarcodeReadOptions.ForeColor

Controls the barcode foreground color (color of the bars or symbols) to use when reading a barcode from a colored image.
BarcodeReadOptions.BackColor

Controls the barcode background color (color of the spaces) to use when reading a barcode from a colored image.
BarcodeReadOptions.Load and BarcodeReadOptions.Save

Can be used to save or load the options to/from an XML file or stream.
BarcodeReadOptions.GetSupportedSymbologies

This class overrides the base class method to return an array containing the following symbologies: BarcodeSymbology.PatchCode

In addition to the features features and members, the PatchCodeBarcodeReadOptions contains these Patch Code barcodes specific features:

Member Description
SearchDirection

The direction to use when searching for barcodes (horizontal, vertical or both)
Granularity

The number of scanned lines per column to skip when reading a barcode
Example
Copy Code   
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Forms
Imports Leadtools.Barcode
Imports Leadtools.ImageProcessing

Public Sub PatchCodeBarcode_Example()
   Dim imageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "MyPatchCodeBarcode.tif")

   Dim engine As New BarcodeEngine()

   ' Create the image to write the barcodes to
   Dim resolution As Integer = 300
   Using image As RasterImage = RasterImage.Create(CType(8.5 * resolution, Integer), CType(11.0 * resolution, Integer), 1, resolution, RasterColor.FromKnownColor(RasterKnownColor.White))
      ' Write two PatchCode barcodes
      WriteBarcode(engine.Writer, image, "1100")

      ' Save the image
      Using codecs As New RasterCodecs()
         codecs.Save(image, imageFileName, RasterImageFormat.CcittGroup4, 1)
      End Using
   End Using

   ' Now read the barcodes again
   Using codecs As New RasterCodecs()
      Using image As RasterImage = codecs.Load(imageFileName)
         ' Read the PatchCode barcode
         ReadBarcode(engine.Reader, image)
      End Using
   End Using
End Sub

Private Sub WriteBarcode(ByVal writer As BarcodeWriter, ByVal image As RasterImage, ByVal value As String)
   ' Create the barcode data
   Dim barcode As New BarcodeData(BarcodeSymbology.PatchCode, value)

   ' Set the write options
   Dim options As New PatchCodeBarcodeWriteOptions()
   ' Use X Module when writing the barcode
   options.UseXModule = True
   options.XModule = 30

   ' Usually PatchCodes are centered in the middle of the page and take the whole height

   ' Calculate its size
   writer.CalculateBarcodeDataBounds(New LogicalRectangle(0, 0, image.ImageWidth, image.ImageHeight, LogicalUnit.Pixel), image.XResolution, image.YResolution, barcode, options)

   ' Position it
   Dim pixels As LeadRect = barcode.Bounds.ToRectangle(image.XResolution, image.YResolution)
   pixels.X = (image.ImageWidth - pixels.Width) \ 2
   pixels.Y = 0
   pixels.Height = image.ImageHeight
   barcode.Bounds = New LogicalRectangle(pixels)

   ' Write it
   Console.WriteLine("Writing barcode with Data: {0}", value)
   writer.WriteBarcode(image, barcode, options)
End Sub

Private Sub ReadBarcode(ByVal reader As BarcodeReader, ByVal image As RasterImage)
   ' Setup read options
   Dim options As New PatchCodeBarcodeReadOptions()
   options.SearchDirection = BarcodeSearchDirection.Horizontal
   options.Granularity = 9

   Console.WriteLine("Reading PatchCode barcode")
   Dim barcode As BarcodeData = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.PatchCode, options)
   If Not IsNothing(barcode) Then
      Console.WriteLine(" At {0}, data: {1}", barcode.Bounds, barcode.Value)
   Else
      Console.WriteLine(" Not found")
   End If
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;

public void PatchCodeBarcode_Example()
{
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyPatchCodeBarcode.tif");

   BarcodeEngine engine = new BarcodeEngine();

   // Create the image to write the barcodes to
   int resolution = 300;
   using(RasterImage image = RasterImage.Create((int)(8.5 * resolution), (int)(11.0 * resolution), 1, resolution, RasterColor.FromKnownColor(RasterKnownColor.White)))
   {
      // Write two PatchCode barcodes
      WriteBarcode(engine.Writer, image, "1100");

      // Save the image
      using(RasterCodecs codecs = new RasterCodecs())
      {
         codecs.Save(image, imageFileName, RasterImageFormat.CcittGroup4, 1);
      }
   }

   // Now read the barcodes again
   using(RasterCodecs codecs = new RasterCodecs())
   {
      using(RasterImage image = codecs.Load(imageFileName))
      {
         // Read the PatchCode barcode
         ReadBarcode(engine.Reader, image);
      }
   }
}

private void WriteBarcode(BarcodeWriter writer, RasterImage image, string value)
{
   // Create the barcode data
   BarcodeData barcode = new BarcodeData(BarcodeSymbology.PatchCode, value);

   // Set the write options
   PatchCodeBarcodeWriteOptions options = new PatchCodeBarcodeWriteOptions();
   // Use X Module when writing the barcode
   options.UseXModule = true;
   options.XModule = 30;

   // Usually PatchCodes are centered in the middle of the page and take the whole height

   // Calculate its size
   writer.CalculateBarcodeDataBounds(new LogicalRectangle(0, 0, image.ImageWidth, image.ImageHeight, LogicalUnit.Pixel), image.XResolution, image.YResolution, barcode, options);

   // Position it
   LeadRect pixels = barcode.Bounds.ToRectangle(image.XResolution, image.YResolution);
   pixels.X = (image.ImageWidth - pixels.Width) / 2;
   pixels.Y = 0;
   pixels.Height = image.ImageHeight;
   barcode.Bounds = new LogicalRectangle(pixels);

   // Write it
   Console.WriteLine("Writing barcode with Data: {0}", value);
   writer.WriteBarcode(image, barcode, options);
}

private void ReadBarcode(BarcodeReader reader, RasterImage image)
{
   // Setup read options
   PatchCodeBarcodeReadOptions options = new PatchCodeBarcodeReadOptions();
   options.SearchDirection = BarcodeSearchDirection.Horizontal;
   options.Granularity = 9;

   Console.WriteLine("Reading PatchCode barcode");
   BarcodeData barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.PatchCode, options);
   if(barcode != null)
   {
      Console.WriteLine(" At {0}, data: {1}", barcode.Bounds, barcode.Value);
   }
   else
   {
      Console.WriteLine(" Not found");
   }
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;

      
public async Task PatchCodeBarcode_Example()
{
   string imageFileName = @"MyPatchCodeBarcode.tif";
   BarcodeEngine engine = new BarcodeEngine();

   // Create the image to write the barcodes to
   int resolution = 300;
   using(RasterImage image = RasterImage.Create((int)(8.5 * resolution), (int)(11.0 * resolution), 1, resolution, RasterColorHelper.FromKnownColor(RasterKnownColor.White)))
   {
      // Write two PatchCode barcodes
      WriteBarcode(engine.Writer, image, "1100");

      // Save the image
      using(RasterCodecs codecs = new RasterCodecs())
      {
         StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(imageFileName);
         await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.CcittGroup4, 1);
      }
   }

   // Now read the barcodes again
   using(RasterCodecs codecs = new RasterCodecs())
   {
      StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(imageFileName);
      using(RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile)))
      {
         // Read the PatchCode barcode
         ReadBarcode(engine.Reader, image);
      }
   }
}

private void WriteBarcode(BarcodeWriter writer, RasterImage image, string value)
{
   // Create the barcode data
   BarcodeData barcode = new BarcodeData(BarcodeSymbology.PatchCode, value);

   // Set the write options
   PatchCodeBarcodeWriteOptions options = new PatchCodeBarcodeWriteOptions();
   // Use X Module when writing the barcode
   options.UseXModule = true;
   options.XModule = 30;

   // Usually PatchCodes are centered in the middle of the page and take the whole height

   // Calculate its size
   writer.CalculateBarcodeDataBounds(LeadRectHelper.Create(0, 0, image.ImageWidth, image.ImageHeight), image.XResolution, image.YResolution, barcode, options);

   // Position it
   LeadRect pixels = barcode.Bounds;
   pixels.X = (image.ImageWidth - pixels.Width) / 2;
   pixels.Y = 0;
   pixels.Height = image.ImageHeight;
   barcode.Bounds = pixels;

   // Write it
   Debug.WriteLine("Writing barcode with Data: {0}", value);
   writer.WriteBarcode(image, barcode, options);
}

private void ReadBarcode(BarcodeReader reader, RasterImage image)
{
   // Setup read options
   PatchCodeBarcodeReadOptions options = new PatchCodeBarcodeReadOptions();
   options.SearchDirection = BarcodeSearchDirection.Horizontal;
   options.Granularity = 9;

   Debug.WriteLine("Reading PatchCode barcode");
   BarcodeData barcode = reader.ReadBarcode(image, LeadRectHelper.Empty, BarcodeSymbology.PatchCode, options);
   if(barcode != null)
   {
      Debug.WriteLine(" At {0}, data: {1}", barcode.Bounds, barcode.Value);
   }
   else
   {
      Debug.WriteLine(" Not found");
   }
}
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;
using Leadtools.Examples;

public void PatchCodeBarcode_Example(RasterImage image, Stream outStream)
{
   BarcodeEngine engine = new BarcodeEngine();
   // Create the image to write the barcodes to
   RasterCodecs codecs = new RasterCodecs();

   // Write two PatchCode barcodes
   WriteBarcode(engine.Writer, image, "1100");

   // Save the image
   codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1);

   // Now read the barcodes again
   ReadBarcode(engine.Reader, image);
}

private void WriteBarcode(BarcodeWriter writer, RasterImage image, string value)
{
   // Create the barcode data
   BarcodeData barcode = new BarcodeData(BarcodeSymbology.PatchCode, value);

   // Set the write options
   PatchCodeBarcodeWriteOptions options = new PatchCodeBarcodeWriteOptions();
   // Use X Module when writing the barcode
   options.UseXModule = true;
   options.XModule = 30;

   // Usually PatchCodes are centered in the middle of the page and take the whole height

   // Calculate its size
   writer.CalculateBarcodeDataBounds(new LogicalRectangle(0, 0, image.ImageWidth, image.ImageHeight, LogicalUnit.Pixel), image.XResolution, image.YResolution, barcode, options);

   // Position it
   LeadRect pixels = barcode.Bounds.ToRectangle(image.XResolution, image.YResolution);
   pixels.X = (image.ImageWidth - pixels.Width) / 2;
   pixels.Y = 0;
   pixels.Height = image.ImageHeight;
   barcode.Bounds = new LogicalRectangle(pixels);

   // Write it
   Console.WriteLine("Writing barcode with Data: {0}", value);
   writer.WriteBarcode(image, barcode, options);
}

private void ReadBarcode(BarcodeReader reader, RasterImage image)
{
   // Setup read options
   PatchCodeBarcodeReadOptions options = new PatchCodeBarcodeReadOptions();
   options.SearchDirection = BarcodeSearchDirection.Horizontal;
   options.Granularity = 9;

   Console.WriteLine("Reading PatchCode barcode");
   BarcodeData barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.PatchCode, options);
   if(barcode != null)
   {
      Console.WriteLine(" At {0}, data: {1}", barcode.Bounds, barcode.Value);
   }
   else
   {
      Console.WriteLine(" Not found");
   }
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Forms
Imports Leadtools.Barcode
Imports Leadtools.ImageProcessing

Public Sub PatchCodeBarcode_Example(ByVal image As RasterImage, ByVal outStream As Stream)
  Dim engine As BarcodeEngine = New BarcodeEngine()
  ' Create the image to write the barcodes to
  Dim codecs As RasterCodecs = New RasterCodecs()

  ' Write two PatchCode barcodes
  WriteBarcode(engine.Writer, image, "1100")

  ' Save the image
  codecs.Save(image, outStream, RasterImageFormat.CcittGroup4, 1)

  ' Now read the barcodes again
  ReadBarcode(engine.Reader, image)
End Sub

Private Sub WriteBarcode(ByVal writer As BarcodeWriter, ByVal image As RasterImage, ByVal value As String)
  ' Create the barcode data
  Dim barcode As BarcodeData = New BarcodeData(BarcodeSymbology.PatchCode, value)

  ' Set the write options
  Dim options As PatchCodeBarcodeWriteOptions = New PatchCodeBarcodeWriteOptions()
  ' Use X Module when writing the barcode
  options.UseXModule = True
  options.XModule = 30

  ' Usually PatchCodes are centered in the middle of the page and take the whole height

  ' Calculate its size
  writer.CalculateBarcodeDataBounds(New LogicalRectangle(0, 0, image.ImageWidth, image.ImageHeight, LogicalUnit.Pixel), image.XResolution, image.YResolution, barcode, options)

  ' Position it
  Dim pixels As LeadRect = barcode.Bounds.ToRectangle(image.XResolution, image.YResolution)
  pixels.X = (image.ImageWidth - pixels.Width) / 2
  pixels.Y = 0
  pixels.Height = image.ImageHeight
  barcode.Bounds = New LogicalRectangle(pixels)

  ' Write it
  Console.WriteLine("Writing barcode with Data: {0}", value)
  writer.WriteBarcode(image, barcode, options)
End Sub

Private Sub ReadBarcode(ByVal reader As BarcodeReader, ByVal image As RasterImage)
  ' Setup read options
  Dim options As PatchCodeBarcodeReadOptions = New PatchCodeBarcodeReadOptions()
  options.SearchDirection = BarcodeSearchDirection.Horizontal
  options.Granularity = 9

  Console.WriteLine("Reading PatchCode barcode")
  Dim barcode As BarcodeData = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.PatchCode, options)
  If Not barcode Is Nothing Then
    Console.WriteLine(" At {0}, data: {1}", barcode.Bounds, barcode.Value)
  Else
    Console.WriteLine(" Not found")
  End If
End Sub
Requirements

Target Platforms

See Also

Reference

PatchCodeBarcodeReadOptions Members
Leadtools.Barcode Namespace
BarcodeData Class
BarcodeReader Class
BarcodeSymbology Enumeration
BarcodeEngine Class
BarcodeReader.ReadBarcode
BarcodeReader.ReadBarcodes
Programming with LEADTOOLS Barcode
Supported Barcode Symbologies
Unlocking Barcode Support
Reading Barcodes Tutorial
USPS and 4-State Barcodes in LEADTOOLS

 

 

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Leadtools.Barcode requires a Barcode Module license and unlock key. For more information, refer to: LEADTOOLS Toolkit Features