ECCLevel Property

Summary

Gets or sets a value that indicates the ECC (Error Correction) level to use when writing QR barcodes.

Syntax

Objective-C

C++/CLI

Java

Python

public QRBarcodeECCLevel ECCLevel { get; set; }

@property (nonatomic, assign) LTQRBarcodeECCLevel eccLevel;

public QRBarcodeECCLevel getECCLevel() 
public void setECCLevel(QRBarcodeECCLevel value)

public: 
property QRBarcodeECCLevel ECCLevel { 
   QRBarcodeECCLevel get(); 
   void set (    QRBarcodeECCLevel ); 
}

ECCLevel # get and set (QRBarcodeWriteOptions)

Property Value

An QRBarcodeECCLevel enumeration member that determine the ECC (Error Correction) level to use when writing QR barcodes. Default value is QRBarcodeECCLevel.LevelL.

Remarks

For more information, refer to QRBarcodeECCLevel.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
 
 
public void QRBarcode_Example() 
{ 
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyQRBarcodes.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 QR barcodes 
      WriteBarcode(engine.Writer, image, QRBarcodeSymbolModel.Model1AutoSize, "QR Data 1", false); 
      WriteBarcode(engine.Writer, image, QRBarcodeSymbolModel.Model2Version30, "QR Data 2", true); 
 
      // 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 all the QR barcodes 
         ReadBarcodes(engine.Reader, image); 
      } 
   } 
} 
 
private void WriteBarcode(BarcodeWriter writer, RasterImage image, QRBarcodeSymbolModel symbolModel, string value, bool topLeft) 
{ 
   // Create the barcode data 
   QRBarcodeData barcode = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.QR) as QRBarcodeData; 
   barcode.SymbolModel = symbolModel; 
   barcode.Value = value; 
   barcode.Symbology = BarcodeSymbology.QR; 
 
   // We will use the alignment to position the barcodes, so use all of the image 
   barcode.Bounds = new LeadRect(0, 0, image.ImageWidth, image.ImageHeight); 
 
   // Set the write options 
   QRBarcodeWriteOptions options = new QRBarcodeWriteOptions(); 
 
   if (topLeft) 
   { 
      options.HorizontalAlignment = BarcodeAlignment.Near; 
      options.VerticalAlignment = BarcodeAlignment.Near; 
   } 
   else 
   { 
      options.HorizontalAlignment = BarcodeAlignment.Far; 
      options.VerticalAlignment = BarcodeAlignment.Far; 
   } 
 
   options.GroupNumber = 0; 
   options.GroupTotal = 0; 
   options.XModule = 30; 
   options.ECCLevel = QRBarcodeECCLevel.LevelL; 
 
   // Write it 
   Console.WriteLine("Writing barcode with symbol model: {0} and Data: {1}", symbolModel, value); 
   writer.WriteBarcode(image, barcode, options); 
} 
 
private void ReadBarcodes(BarcodeReader reader, RasterImage image) 
{ 
   // Setup read options 
   QRBarcodeReadOptions options = new QRBarcodeReadOptions(); 
   options.EnableDoublePass = false; 
   options.EnableDoublePassIfSuccess = true; 
   options.EnablePreprocessing = true; 
 
   Console.WriteLine("Reading QR barcodes"); 
   BarcodeData[] barcodes = reader.ReadBarcodes(image, LeadRect.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.QR }, new BarcodeReadOptions[] { options }); 
   Console.WriteLine("{0} barcodes found:", barcodes.Length); 
   foreach (QRBarcodeData barcode in barcodes) 
   { 
      string value = BarcodeData.ParseECIData(barcode.GetData()); 
      if (string.IsNullOrEmpty(value)) 
         value = barcode.Value; 
 
      Console.WriteLine(" At {0}, symbol model: {1} data: {2} and symbology: {3}", barcode.Bounds, barcode.SymbolModel, value, barcode.Symbology); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.barcode.*; 
import leadtools.codecs.*; 
 
 
public void qrBarcodeExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String imageFileName = combine(LEAD_VARS_IMAGES_DIR, "QRBarcodes.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 QR barcodes 
   writeBarcode(engine.getWriter(), image, QRBarcodeSymbolModel.MODEL1_AUTOSIZE, "QR Data 1", false); 
   writeBarcode(engine.getWriter(), image, QRBarcodeSymbolModel.MODEL2_VERSION30, "QR Data 2", true); 
 
   // Save the image 
   codecs.save(image, imageFileName, RasterImageFormat.CCITT_GROUP4, 1); 
 
   // Now read the barcodes again 
   image = codecs.load(imageFileName); 
 
   // Read all the QR barcodes 
   readBarcodes(engine.getReader(), image); 
 
   // Clean up 
   image.dispose(); 
   codecs.dispose(); 
 
   assertTrue("file unsuccessfully saved to " + imageFileName, (new File(imageFileName)).exists()); 
   System.out.printf("File saved successfully to %s%n", imageFileName); 
} 
 
// Create the barcode data 
private void writeBarcode(BarcodeWriter writer, RasterImage image, QRBarcodeSymbolModel symbolModel, String value, boolean topLeft) { 
   QRBarcodeData barcode = (QRBarcodeData) BarcodeData.createDefaultBarcodeData(BarcodeSymbology.QR); 
   barcode.setSymbolModel(symbolModel); 
   barcode.setValue(value); 
   barcode.setSymbology(BarcodeSymbology.QR); 
 
   // We will use the alignment to position the barcodes, so use all of the image 
   barcode.setBounds(new LeadRect(0, 0, image.getImageWidth(), image.getImageHeight())); 
 
   // Set the write options 
   QRBarcodeWriteOptions options = new QRBarcodeWriteOptions(); 
 
   if (topLeft) { 
      options.setHorizontalAlignment(BarcodeAlignment.NEAR); 
      options.setVerticalAlignment(BarcodeAlignment.NEAR); 
   } else { 
      options.setHorizontalAlignment(BarcodeAlignment.FAR); 
      options.setVerticalAlignment(BarcodeAlignment.FAR); 
   } 
 
   options.setGroupNumber(0); 
   options.setGroupTotal(0); 
   options.setXModule(30); 
   options.setECCLevel(QRBarcodeECCLevel.LEVEL_L); 
 
   // Write it 
   System.out.printf("Writing barcode with symbol model: %1s and Data: %2s %n", symbolModel, value); 
   writer.writeBarcode(image, barcode, options); 
} 
 
// Setup read options 
private void readBarcodes(BarcodeReader reader, RasterImage image) { 
   QRBarcodeReadOptions options = new QRBarcodeReadOptions(); 
   options.setEnableDoublePass(false); 
   options.setEnableDoublePassIfSuccess(true); 
   options.setEnablePreprocessing(true); 
 
   System.out.println("Reading QR barcodes"); 
   BarcodeData[] barcodes = reader.readBarcodes(image, LeadRect.getEmpty(), 0, 
         new BarcodeSymbology[] { BarcodeSymbology.QR }, new BarcodeReadOptions[] { options }); 
   System.out.printf("%s barcodes found: %n", barcodes.length); 
 
   for (BarcodeData barcode : barcodes) { 
      String value = BarcodeData.parseECIData(barcode.getData()); 
      if (value == null) 
         value = barcode.getValue(); 
 
      System.out.printf(" At %1s, symbol model: %2s data: %3s and symbology: %4s %n", barcode.getBounds(), 
            barcode.getData(), value, barcode.getSymbology()); 
   } 
}

Requirements

Target Platforms

Reference

QRBarcodeWriteOptions Class

QRBarcodeWriteOptions Members

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Help Version 23.0.2024.2.29

Leadtools.Barcode Assembly

Introduction

Getting Started

Namespaces

Leadtools.Barcode Namespace

Assemblies