MicroQRBarcodeReadOptions Class

Summary

Contains the extra options to use when reading MicroQR barcodes.

Syntax

Objective-C

C++/CLI

Java

Python

[SerializableAttribute()] 
public class MicroQRBarcodeReadOptions : BarcodeReadOptions

@interface LTMicroQRBarcodeReadOptions : LTBarcodeReadOptions

public class MicroQRBarcodeReadOptions extends BarcodeReadOptions

[TypeConverterAttribute()] 
[SerializableAttribute()] 
public ref class MicroQRBarcodeReadOptions : public BarcodeReadOptions, System.ICloneable

class MicroQRBarcodeReadOptions(BarcodeReadOptions):

Remarks

The MicroQRBarcodeReadOptions class is used to control the options when reading MicroQR 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 BarcodeSymbology.MicroQR. Then change the members of the returned MicroQRBarcodeReadOptions by casting it from BarcodeReadOptions to MicroQRBarcodeReadOptions.

It is also possible to create an instance of the MicroQRBarcodeReadOptions class and use it directly in BarcodeReader.ReadBarcode and BarcodeReader.ReadBarcodes methods that accept 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.MicroQR

In addition to these features and members, MicroQRBarcodeReadOptions contains these MicroQR barcodes specific features:

Member	Description
FriendlyName	Gets the friendly name of this class.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
 
 
public void MicroQRBarcode_Example() 
{ 
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyMicroQRBarcodes.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 MicroQR barcodes 
      WriteBarcode(engine.Writer, image, MicroQRBarcodeSymbolModel.AutoSize, "MicroQR Data 1", 0); 
      WriteBarcode(engine.Writer, image, MicroQRBarcodeSymbolModel.MicroQRM4M, "Data", 1000); 
 
      // 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 MicroQR barcodes 
         ReadBarcodes(engine.Reader, image); 
      } 
   } 
} 
 
private void WriteBarcode(BarcodeWriter writer, RasterImage image, MicroQRBarcodeSymbolModel symbolModel, string value, int startRow) 
{ 
   // Create the barcode data 
   MicroQRBarcodeData barcode = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroQR) as MicroQRBarcodeData; 
   barcode.Value = value; 
   barcode.Symbology = BarcodeSymbology.MicroQR; 
 
   // We will use the alignment to position the barcodes, so use all of the image 
   barcode.Bounds = new LeadRect(0, startRow, image.ImageWidth, image.ImageHeight); 
 
   // Set the write options 
   MicroQRBarcodeWriteOptions options = new MicroQRBarcodeWriteOptions(); 
 
   options.XModule = 30; 
   options.SymbolModel = symbolModel; 
 
   // 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 
   MicroQRBarcodeReadOptions options = new MicroQRBarcodeReadOptions(); 
 
   Console.WriteLine("Reading MicroQR barcodes"); 
   BarcodeData[] barcodes = reader.ReadBarcodes(image, LeadRect.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.MicroQR }, new BarcodeReadOptions[] { options }); 
   Console.WriteLine("{0} barcodes found:", barcodes.Length); 
   foreach (MicroQRBarcodeData barcode in barcodes) 
   { 
      Console.WriteLine(" At {0}, and data: {1} and symbology: {2}", barcode.Bounds, barcode.Value, barcode.Symbology); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}