public bool EnableSmallSymbols { get; set; }
true to detect small DataMatrix symbols that are 20 to 40 pixels in size. Otherwise, false. The default value is true.
Set EnableSmallSymbols to false to increase barcode detection speed if you are certain you do not need to detect very small DataMatrix symbols that are 20 to 40 pixels in size.
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 toint 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 oneWriteBarcode(engine.Writer, image, DatamatrixBarcodeSymbolSize.Size16X36, "Datamatrix1 16x36", false);WriteBarcode(engine.Writer, image, DatamatrixBarcodeSymbolSize.Size132X132, "Datamatrix2 132x132", true);// Save the imageusing (RasterCodecs codecs = new RasterCodecs()){codecs.Save(image, imageFileName, RasterImageFormat.CcittGroup4, 1);}}// Now read the barcodes againusing (RasterCodecs codecs = new RasterCodecs()){using (RasterImage image = codecs.Load(imageFileName)){// Read only square symbols, should only read the first barcodeReadBarcodes(engine.Reader, image, true);// Read all symbols, should read both barcodesReadBarcodes(engine.Reader, image, false);}}}private void WriteBarcode(BarcodeWriter writer, RasterImage image, DatamatrixBarcodeSymbolSize symbolSize, string value, bool topLeft){// Create the barcode dataDatamatrixBarcodeData 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 imagebarcode.Bounds = new LeadRect(0, 0, image.ImageWidth, image.ImageHeight);// Set the write optionsDatamatrixBarcodeWriteOptions options = new DatamatrixBarcodeWriteOptions();if (topLeft){options.HorizontalAlignment = BarcodeAlignment.Near;options.VerticalAlignment = BarcodeAlignment.Near;}else{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 itConsole.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 optionsDatamatrixBarcodeReadOptions 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";}