SearchDirection Property

Summary

Gets or sets a value that indicates the direction to use when searching for barcodes.

Syntax

Objective-C

C++/CLI

Java

Python

public BarcodeSearchDirection SearchDirection { get; set; }

@property (nonatomic, assign) LTBarcodeSearchDirection searchDirection;

public BarcodeSearchDirection getSearchDirection() 
public void setSearchDirection(BarcodeSearchDirection value)

public: 
property BarcodeSearchDirection SearchDirection { 
   BarcodeSearchDirection get(); 
   void set (    BarcodeSearchDirection ); 
}

SearchDirection # get and set (PatchCodeBarcodeReadOptions)

Property Value

A BarcodeSearchDirection enumeration member that indicates the direction to use when searching for barcodes. The default value is BarcodeSearchDirection.Horizontal.

Remarks

The BarcodeReader class can search for barcodes in the image horizontally or vertically. By default, the reader will only search for barcodes in horizontal mode for performance reasons. Alter this by changing the appropriate read barcode options to specify vertical or both (horizontal and vertical) search direction.

Example

Java

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:\LEADTOOLS23\Resources\Images"; 
}

 
import static org.junit.Assert.assertTrue; 
 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.Test; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
 
import leadtools.*; 
import leadtools.barcode.*; 
import leadtools.codecs.*; 
 
 
public void patchCodeBarcodeExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String imageFileName = combine(LEAD_VARS_IMAGES_DIR, "PatchCodeBarcode.tif"); 
   RasterCodecs codecs = new RasterCodecs(); 
   BarcodeEngine engine = new BarcodeEngine(); 
 
   // Create the image to write the barcodes to 
   int resolution = 300; 
   RasterImage image = RasterImage.create((int) (8.5 * resolution), (int) (11.0 * resolution), 1, resolution, 
         RasterColor.fromKnownColor(RasterKnownColor.WHITE)); 
 
   // Write two PatchCode barcodes 
   writeBarcode(engine.getWriter(), image, "1100"); 
 
   // Save the image 
   codecs.save(image, imageFileName, RasterImageFormat.CCITT_GROUP4, 1); 
 
   // Now read the barcodes again 
   image = codecs.load(imageFileName); 
 
   // Read the PatchCode barcode 
   readBarcode(engine.getReader(), image); 
 
   // Clean up 
   codecs.dispose(); 
   image.dispose(); 
 
   assertTrue("File unsuccessfully saved to " + imageFileName, new File(imageFileName).exists()); 
   System.out.printf("File successfully saved to %s%n", imageFileName); 
} 
 
// Create the barcode data 
private void writeBarcode(BarcodeWriter writer, RasterImage image, String value) { 
   BarcodeData barcode = new BarcodeData(BarcodeSymbology.PATCH_CODE, value); 
 
   // Set the write options 
   PatchCodeBarcodeWriteOptions options = new PatchCodeBarcodeWriteOptions(); 
   // Use X Module when writing the barcode 
   options.setUseXModule(true); 
   options.setXModule(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.getImageWidth(), image.getImageHeight()), 
         image.getXResolution(), image.getYResolution(), barcode, options); 
 
   // Position it 
   LeadRect pixels = barcode.getBounds(); 
   pixels.setX(image.getImageWidth() - pixels.getWidth() / 2); 
   pixels.setY(0); 
   pixels.setHeight(image.getImageHeight()); 
   barcode.setBounds(new LeadRect()); 
 
   // Write it 
   System.out.printf("Writing barcode with Data: %s%n", value); 
   writer.writeBarcode(image, barcode, options); 
} 
 
// Setup read options 
private void readBarcode(BarcodeReader reader, RasterImage image) { 
   PatchCodeBarcodeReadOptions options = new PatchCodeBarcodeReadOptions(); 
   options.setSearchDirection(BarcodeSearchDirection.HORIZONTAL); 
   options.setGranularity(9); 
 
   System.out.println("Reading PatchCode barcode"); 
   BarcodeData barcode = reader.readBarcode(image, LeadRect.getEmpty(), BarcodeSymbology.PATCH_CODE, options); 
   if (barcode != null) { 
      System.out.printf(" At %1s, data: %2s%n", barcode.getBounds(), barcode.getValue()); 
   } else { 
      System.out.println(" Not found"); 
   } 
} 
 
public static String combine(String path1, String path2) { 
   File file = new File(path1, path2); 
   return file.getPath(); 
}

Requirements

Target Platforms

Reference

PatchCodeBarcodeReadOptions Class

PatchCodeBarcodeReadOptions Members

Download our FREE evaluation

Help Version 23.0.2024.2.29

Leadtools.Barcode Assembly

Introduction

Getting Started

Namespaces

Leadtools.Barcode Namespace

Assemblies