WhiteLinesNumber Property

Summary

Gets or sets a value that indicate the minimum number of lines of white space above and below the barcode symbol.

Syntax

Objective-C

C++/CLI

Java

Python

public int WhiteLinesNumber { get; set; }

@property (nonatomic, assign) NSInteger whiteLinesNumber;

public int getWhiteLinesNumber() 
public void setWhiteLinesNumber(int value)

public: 
property int WhiteLinesNumber { 
   int get(); 
   void set (    int ); 
}

WhiteLinesNumber # get and set (PostNetPlanetBarcodeReadOptions)

Property Value

An Int32 that indicates the minimum number of lines of white space above and below the barcode symbol to use when reading a barcode. Must be a value greater than or equal to 0. The default value is 3.

Remarks

A barcode on an image usually has white space around it. This value defines the minimum number of white space lines (in pixels) that must exist around the barcode before it can be read. The default value of 3 means 3 pixels on the top and bottom of the barcode.

Change this value when the barcode is adjacent to another object on the image.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
 
 
public void PostNetPlanetBarcode_Example() 
{ 
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyPostNetPlanetBarcodes.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 a POSTNET and a PLANET barcodes 
      WriteBarcode(engine.Writer, image, BarcodeSymbology.PostNet, "123456789", new LeadRect(10, 100, 400, 200)); 
      WriteBarcode(engine.Writer, image, BarcodeSymbology.Planet, "12345678901", new LeadRect(10, 500, 400, 200)); 
 
      // 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 POSTNET barcode 
         ReadBarcodes(engine.Reader, image, BarcodeSymbology.PostNet); 
 
         // Read the PLANET barcode 
         ReadBarcodes(engine.Reader, image, BarcodeSymbology.Planet); 
      } 
   } 
} 
 
private void WriteBarcode(BarcodeWriter writer, RasterImage image, BarcodeSymbology symbology, string value, LeadRect bounds) 
{ 
   // Create the barcode data 
   BarcodeData barcode = new BarcodeData(symbology, value); 
   barcode.Bounds = bounds; 
 
   // Set the write options 
   PostNetPlanetBarcodeWriteOptions options = new PostNetPlanetBarcodeWriteOptions(); 
   options.UseXModule = false; 
   options.XModule = 30; 
 
   // Write it 
   Console.WriteLine("Writing {0} barcode with data: {1}", symbology, value); 
   writer.WriteBarcode(image, barcode, options); 
} 
 
private void ReadBarcodes(BarcodeReader reader, RasterImage image, BarcodeSymbology symbology) 
{ 
   // Setup read options 
   PostNetPlanetBarcodeReadOptions options = new PostNetPlanetBarcodeReadOptions(); 
   options.SearchDirection = BarcodeSearchDirection.Horizontal; 
   options.Granularity = 9; 
   options.WhiteLinesNumber = 3; 
   options.ReturnCheckDigit = BarcodeReturnCheckDigit.Default; 
 
   Console.WriteLine("Reading {0} barcodes", symbology); 
   BarcodeData barcode = reader.ReadBarcode(image, LeadRect.Empty, symbology, 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:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

PostNetPlanetBarcodeReadOptions Class

PostNetPlanetBarcodeReadOptions Members

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Help Version 22.0.2023.5.9

Leadtools.Barcode Assembly

Introduction

Getting Started

Namespaces

Leadtools.Barcode Namespace

Assemblies