public bool EnableFastMode { get; set; }
true if fast Datamatrix reading mode is enabled. Otherwise, false. Default value is true.
Disabling fast mode can sometimes help recognition of broken or unclear DataMatrix symbols.
Fast read mode is automatically disabled when reading small symbols. In other words, the value of EnableFastMode is ignored when EnableSmallSymbols is set 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;
}
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 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";
}