PatchCodeBarcodeReadOptions Class

Summary

Contains extra options to use when reading Patch Code barcodes.

Syntax

Objective-C

C++

Java

[SerializableAttribute()] 
public class PatchCodeBarcodeReadOptions : BarcodeReadOptions

<TypeConverterAttribute()> 
<SerializableAttribute()> 
Public Class PatchCodeBarcodeReadOptions  
   Inherits BarcodeReadOptions 
   Implements System.ICloneable

@interface LTPatchCodeBarcodeReadOptions : LTBarcodeReadOptions

public class PatchCodeBarcodeReadOptions extends BarcodeReadOptions

[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:

BarcodeSymbology.PatchCode

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 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

This example will write and Patch Code barcode to/from an image.

using Leadtools; 
using Leadtools.Codecs; 
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 LeadRect(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 = new LeadRect(); 
 
	// 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, LeadRect.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:\LEADTOOLS21\Resources\Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
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 LeadRect(0, 0, image.ImageWidth, image.ImageHeight), image.XResolution, image.YResolution, barcode, options) 
 
   ' Position it 
   Dim pixels As LeadRect = barcode.Bounds 
   pixels.X = (image.ImageWidth - pixels.Width) \ 2 
   pixels.Y = 0 
   pixels.Height = image.ImageHeight 
   barcode.Bounds = New LeadRect() 
 
   ' 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, LeadRect.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:\LEADTOOLS21\Resources\Images" 
End Class