QRBarcodeECCLevel Enumeration (original) (raw)
Summary
Specifies the QR symbol ECC level.
Syntax
C#
Objective-C
C++/CLI
Java
Python
[SerializableAttribute()]
public enum QRBarcodeECCLevel
typedef NS_ENUM(NSInteger, LTQRBarcodeECCLevel) {
LTQRBarcodeECCLevelLevelL,
LTQRBarcodeECCLevelLevelM,
LTQRBarcodeECCLevelLevelQ,
LTQRBarcodeECCLevelLevelH
};
public enum QRBarcodeECCLevel [SerializableAttribute()]
public enum class QRBarcodeECCLevel
class QRBarcodeECCLevel(Enum):
LevelL = 0
LevelM = 1
LevelQ = 2
LevelH = 3
Members
| Value | Member | Description |
|---|---|---|
| 0 | LevelL | QR Level L - Lowest reliability |
| 1 | LevelM | QR Level M - Standard reliability |
| 2 | LevelQ | QR Level Q - High reliability |
| 3 | LevelH | QR Level H - Maximum reliability |
Example
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;
public void QRBarcode_Example()
{
string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyQRBarcodes.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 QR barcodes
WriteBarcode(engine.Writer, image, QRBarcodeSymbolModel.Model1AutoSize, "QR Data 1", false);
WriteBarcode(engine.Writer, image, QRBarcodeSymbolModel.Model2Version30, "QR Data 2", 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 all the QR barcodes
ReadBarcodes(engine.Reader, image);
}
}
}
private void WriteBarcode(BarcodeWriter writer, RasterImage image, QRBarcodeSymbolModel symbolModel, string value, bool topLeft)
{
// Create the barcode data
QRBarcodeData barcode = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.QR) as QRBarcodeData;
barcode.SymbolModel = symbolModel;
barcode.Value = value;
barcode.Symbology = BarcodeSymbology.QR;
// 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
QRBarcodeWriteOptions options = new QRBarcodeWriteOptions();
if (topLeft)
{
options.HorizontalAlignment = BarcodeAlignment.Near;
options.VerticalAlignment = BarcodeAlignment.Near;
}
else
{
options.HorizontalAlignment = BarcodeAlignment.Far;
options.VerticalAlignment = BarcodeAlignment.Far;
}
options.GroupNumber = 0;
options.GroupTotal = 0;
options.XModule = 30;
options.ECCLevel = QRBarcodeECCLevel.LevelL;
// 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
QRBarcodeReadOptions options = new QRBarcodeReadOptions();
options.EnableDoublePass = false;
options.EnableDoublePassIfSuccess = true;
options.EnablePreprocessing = true;
Console.WriteLine("Reading QR barcodes");
BarcodeData[] barcodes = reader.ReadBarcodes(image, LeadRect.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.QR }, new BarcodeReadOptions[] { options });
Console.WriteLine("{0} barcodes found:", barcodes.Length);
foreach (QRBarcodeData barcode in barcodes)
{
string value = BarcodeData.ParseECIData(barcode.GetData());
if (string.IsNullOrEmpty(value))
value = barcode.Value;
Console.WriteLine(" At {0}, symbol model: {1} data: {2} and symbology: {3}", barcode.Bounds, barcode.SymbolModel, value, barcode.Symbology);
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}