public class BarcodeEngine
@interface LTBarcodeEngine : NSObject
public class BarcodeEngine
public ref class BarcodeEngine
class BarcodeEngine:
The BarcodeEngine class is the main entry point for LEADTOOLS support for barcode reading and writing.
This class contains the following members:
BarcodeEngine.Reader: The instance of the BarcodeReader class that you can use to read barcodes from an image.
BarcodeEngine.Writer: The instance of the BarcodeWriter class that you can use to write barcodes to an image.
This class also contains the following helper static (Shared in VB) methods:
BarcodeEngine.GetSupportedSymbologies: Returns an array of BarcodeSymbology enumeration members that lists all the barcode symbologies supported by LEADTOOLS.
BarcodeEngine.GetSymbologyFriendlyName: Returns a string that contains a friendly name of any BarcodeSymbology enumeration member.
To start using LEADTOOLS barcode support, first create an instance of BarcodeEngine. This will automatically create the BarcodeReader and BarcodeWriter objects for you. You can then access those objects through BarcodeEngine.Reader and BarcodeEngine.Writer to start reading or writing barcodes.
All these objects are thread-safe and you can pass the same BarcodeEngine, BarcodeReader or BarcodeWriter object to multiple threads. Additionally, you may read or write barcodes at the same time from/to different images and also create a separate BarcodeEngine for each thread if required. The BarcodeReader.ReadBarcodes(RasterImage image, LeadRect searchBounds, int maximumBarcodes, BarcodeSymbology[] symbologies, BarcodeReadOptions[] options) example shows how to create two threads: One for reading horizontal barcodes and one for reading vertical barcodes. It will then use the same BarcodeReader to try and read all the barcodes from an image using both threads.
For a list of the barcode symbologies supported by LEADTOOLS, refer to Supported Barcode Symbologies.
For a tutorial, refer to one of the Extract Barcodes Tutorials
This example creates a new BarcodeEngine and reads all the barcodes in an image. For an example on writing barcodes, refer to BarcodeWriter.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;
public void BarcodeEngine_Example()
{
string[] imageFileNames =
{
Path.Combine(LEAD_VARS.ImagesDir, "Barcode1.tif"),
Path.Combine(LEAD_VARS.ImagesDir, "Barcode2.tif")
};
// Create a Barcode engine
BarcodeEngine engine = new BarcodeEngine();
// Load the image
using (RasterCodecs codecs = new RasterCodecs())
{
foreach (string imageFileName in imageFileNames)
{
using (RasterImage image = codecs.Load(imageFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1))
{
// Read all the barcodes in this image
BarcodeData[] barcodes = engine.Reader.ReadBarcodes(image, LeadRect.Empty, 0, null);
// Print out the barcodes we found
Console.WriteLine("{0} contains {1} barcodes", imageFileName, barcodes.Length);
for (int i = 0; i < barcodes.Length; i++)
{
BarcodeData barcode = barcodes[i];
Console.WriteLine(" {0} - {1} - {2}", i + 1, barcode.Symbology, barcode.Value);
}
Console.WriteLine("-----------------");
}
}
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images";
}
import static org.junit.Assert.assertTrue;
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 leadtools.*;
import leadtools.barcode.*;
import leadtools.codecs.*;
public void barcodeEngine_Example() {
final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images";
String[] imageFileNames = {
combine(LEAD_VARS_IMAGES_DIR, "Barcode1.tif"),
combine(LEAD_VARS_IMAGES_DIR, "Barcode2.tif")
};
// Create a Barcode engine
BarcodeEngine engine = new BarcodeEngine();
// Load the image
RasterCodecs codecs = new RasterCodecs();
for (String imageFileName : imageFileNames) {
RasterImage image = codecs.load(imageFileName, 0, CodecsLoadByteOrder.BGR_OR_GRAY, 1, 1);
// Read all the barcodes in this image
BarcodeData[] barcodes = engine.getReader().readBarcodes(image, LeadRect.getEmpty(), 0, null);
// Print out the barcodes we found
System.out.printf("%1s contains %2s barcodes%n", imageFileName, barcodes.length);
for (int i = 0; i < barcodes.length; i++) {
BarcodeData barcode = barcodes[i];
System.out.printf(" %1s - %2s - %3s%n", i + 1, barcode.getSymbology(), barcode.getValue());
}
System.out.println("-----------------");
codecs.save(image, imageFileName, RasterImageFormat.TIF, 0);
assertTrue("The file saves to " + imageFileName, (new File(imageFileName)).exists());
}
}
Programming with LEADTOOLS Barcode
UPC / EAN Barcodes in LEADTOOLS
GS1 DataBar / RSS-14 Barcodes in LEADTOOLS
Code 128 Barcodes in LEADTOOLS
USPS and 4-State Barcodes in LEADTOOLS
MSI Barcodes (Pulse Width Modulated) in LEADTOOLS
Miscellaneous Barcodes in LEADTOOLS
Datamatrix Barcodes in LEADTOOLS
PDF417 and MicroPDF417 Barcodes in LEADTOOLS
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