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ReadSquareSymbolsOnly Property

Gets or sets a value indicating whether square or square and rectangular DataMatrix symbols are detected.
public bool ReadSquareSymbolsOnly { get; set; } 
@property (nonatomic, assign) BOOL readSquareSymbolsOnly; 
public boolean getReadSquareSymbolsOnly() 
public void setReadSquareSymbolsOnly(boolean value) 
property bool ReadSquareSymbolsOnly { 
   bool get(); 
   void set (    bool ); 
ReadSquareSymbolsOnly # get and set (DatamatrixBarcodeReadOptions) 

Property Value

true to enable reading square DataMatrix symbols only (rectangular symbols are not detected). Otherwise, false (both square and rectangular symbols are detected). The default value is false.


LEADTOOLS can detect both square and rectangular symbols. DataMatrix symbols are usually square and not rectangular. If you have a requirement to detect strict square shapes only, then set the value of ReadSquareSymbolsOnly to true.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
public void DatamatrixBarcode_Example() 
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyDatamatrixBarcodes.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 Datamatrix barcodes, a square and a rectangle one 
      WriteBarcode(engine.Writer, image, DatamatrixBarcodeSymbolSize.Size16X36, "Datamatrix1 16x36", false); 
      WriteBarcode(engine.Writer, image, DatamatrixBarcodeSymbolSize.Size132X132, "Datamatrix2 132x132", 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 only square symbols, should only read the first barcode 
         ReadBarcodes(engine.Reader, image, true); 
         // Read all symbols, should read both barcodes 
         ReadBarcodes(engine.Reader, image, false); 
private void WriteBarcode(BarcodeWriter writer, RasterImage image, DatamatrixBarcodeSymbolSize symbolSize, string value, bool topLeft) 
   // Create the barcode data 
   DatamatrixBarcodeData barcode = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.Datamatrix) as DatamatrixBarcodeData; 
   barcode.SymbolSize = symbolSize; 
   barcode.Value = value; 
   barcode.Symbology= BarcodeSymbology.Datamatrix; 
   // 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 
   DatamatrixBarcodeWriteOptions options = new DatamatrixBarcodeWriteOptions(); 
   if (topLeft) 
      options.HorizontalAlignment = BarcodeAlignment.Near; 
      options.VerticalAlignment = BarcodeAlignment.Near; 
      options.HorizontalAlignment = BarcodeAlignment.Far; 
      options.VerticalAlignment = BarcodeAlignment.Far; 
   options.DisableCompression = false; 
   options.GroupNumber = 0; 
   options.GroupTotal = 0; 
   options.FileIdNumberLowByte = 1; 
   options.FileIdNumberHighByte = 1; 
   options.XModule = 30; 
   options.HRItoGS1 = false; 
   // Write it 
   Console.WriteLine("Writing barcode with symbol size: {0} and Data: {1}", symbolSize, value); 
   writer.WriteBarcode(image, barcode, options); 
private void ReadBarcodes(BarcodeReader reader, RasterImage image, bool squareOnly) 
   // Setup read options 
   DatamatrixBarcodeReadOptions options = new DatamatrixBarcodeReadOptions(); 
   options.ReadSquareSymbolsOnly = squareOnly; 
   options.EnableDoublePass = false; 
   options.EnableDoublePassIfSuccess = false; 
   options.EnableInvertedSymbols = false; 
   options.EnableFastMode = true; 
   options.EnableSmallSymbols = true; 
   options.EnablePreprocessing = true; 
   options.GS1toHRI = false; 
   Console.WriteLine("Reading Datamatrix barcodes with ReadSquareSymbolsOnly set to {0}", squareOnly); 
   BarcodeData[] barcodes = reader.ReadBarcodes(image, LeadRect.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.Datamatrix }, new BarcodeReadOptions[] { options }); 
   Console.WriteLine("{0} barcodes found:", barcodes.Length); 
   foreach (DatamatrixBarcodeData barcode in barcodes) 
      Console.WriteLine(" At {0}, symbol size: {1} data: {2} and symbology: {3}", barcode.Bounds, barcode.SymbolSize, barcode.Value, barcode.Symbology); 
static class LEAD_VARS 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 

Target Platforms

Help Version 22.0.2023.5.9
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Barcode Assembly

Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.