private void ScanPreviewBuffer()
{
if (_photoCamera == null)
{
return;
}
if (!_initialized)
{
return;
}
try
{
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var binarizer = new com.google.zxing.common.HybridBinarizer(_luminance);
var binBitmap = new BinaryBitmap(binarizer);
var result = _reader.decode(binBitmap);
OnDecodingCompleted(result);
}
catch (Exception)
{
// If decoding fails it will throw a ReaderException
// and we're not interested in doing anything with it
}
}
//takes the video input and creates a bitmap of the image
BinaryBitmap GetBitmapFromVideo(PhotoCamera cam)
{
BinaryBitmap binaryBitmap = null;
try
{
// Update buffer size
var pixelWidth = (int)_cam.PreviewResolution.Width;
var pixelHeight = (int)_cam.PreviewResolution.Height;
if (_buffer == null || _buffer.Length != (pixelWidth * pixelHeight))
{
_buffer = new byte[pixelWidth * pixelHeight];
}
_cam.GetPreviewBufferY(_buffer);
var luminance = new RGBLuminanceSource(_buffer, pixelWidth, pixelHeight, true);
var binarizer = new com.google.zxing.common.HybridBinarizer(luminance);
binaryBitmap = new BinaryBitmap(binarizer);
}
catch
{
}
return binaryBitmap;
}
protected void btnDecode_Click(object sender, EventArgs e)
{
if (Convert.ToString(Session["isDefaultImage"]) == "IsDefault")
{
lblErrorDecode.Text = "Upload QR Code First!";
lblErrorDecode.ForeColor = System.Drawing.Color.Red;
return;
}
property.path = Server.MapPath("~/Images/QR_Codes/" + "img.bmp");
System.Drawing.Image image = System.Drawing.Image.FromStream(new MemoryStream(File.ReadAllBytes(property.path)));
Bitmap bitMap = new Bitmap(image);
try
{
com.google.zxing.LuminanceSource source = new RGBLuminanceSource(bitMap, bitMap.Width, bitMap.Height);
var binarizer = new com.google.zxing.common.HybridBinarizer(source);
var binBitmap = new com.google.zxing.BinaryBitmap(binarizer);
QRCodeReader qrCodeReader = new QRCodeReader();
com.google.zxing.Result str = qrCodeReader.decode(binBitmap);
txtDecodedOriginalInfo.Text = str.ToString();
lblErrorDecode.Text = "Successfully Decoded!";
lblErrorDecode.ForeColor = System.Drawing.Color.Green;
}
catch
{
}
}
BinaryBitmap GetBitmapFromVideo(PhotoCamera cam)
{
BinaryBitmap binaryBitmap = null;
try
{
// Update buffer size
var pixelWidth = (int)_cam.PreviewResolution.Width;
var pixelHeight = (int)_cam.PreviewResolution.Height;
if (_buffer == null || _buffer.Length != (pixelWidth * pixelHeight))
{
_buffer = new byte[pixelWidth * pixelHeight];
}
_cam.GetPreviewBufferY(_buffer);
var luminance = new RGBLuminanceSource(_buffer, pixelWidth, pixelHeight, true);
var binarizer = new com.google.zxing.common.HybridBinarizer(luminance);
binaryBitmap = new BinaryBitmap(binarizer);
}
catch
{
}
return(binaryBitmap);
}
void captureSource_CaptureImageCompleted(object sender, CaptureImageCompletedEventArgs e)
{
com.google.zxing.qrcode.QRCodeReader qrRead = new com.google.zxing.qrcode.QRCodeReader();
//This is like a platform neutral way of identifying colors in an image
RGBLuminanceSource luminiance = new RGBLuminanceSource(e.Result, e.Result.PixelWidth, e.Result.PixelHeight);
//The next 2 things are used to change color to black and white to be read by the reader
com.google.zxing.common.HybridBinarizer binarizer = new com.google.zxing.common.HybridBinarizer(luminiance);
com.google.zxing.BinaryBitmap binBitmap = new com.google.zxing.BinaryBitmap(binarizer);
com.google.zxing.Result results = default(com.google.zxing.Result);
try
{
//barcode found
results = qrRead.decode(binBitmap);
capturedBarcodes.Items.Insert(0, new ScannedImage(results.Text, e.Result));
capturedBarcodes.SelectedIndex = 0;
mediaElement1.Stop();
mediaElement1.Play();
ImageBrush brush = new ImageBrush();
brush.ImageSource = e.Result;
capturedImage.Fill = brush;
}
catch (com.google.zxing.ReaderException)
{
//no barcode found
if (captureSource.State == CaptureState.Started)
{
captureSource.CaptureImageAsync();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
StartButton_Click(this, new RoutedEventArgs());
}
try
{
BarcodeRead(this, new CustomEventHandler() { Barcode = results.Text });
}
catch (Exception)
{
//no javascript event attached
}
}
private bool TryToRecognize(WriteableBitmap wb, Reader reader, Dictionary<object, object> zxhints, out string output)
{
bool res = false;
output = null;
try
{
var luminiance = new RGBLuminanceSource(wb, wb.PixelWidth, wb.PixelHeight);
var binarizer = new com.google.zxing.common.HybridBinarizer(luminiance);
var binBitmap = new com.google.zxing.BinaryBitmap(binarizer);
// recognize
var results = reader.decode(binBitmap, zxhints); // exception will be thrown if reader cannot decode image.
output = results.Text;
res = true;
}
catch {}
return res;
}
private void QRWorkerMethod(object sender, CertificateScanner.WaiteWindow.WaitWindowEventArgs e)
{
try
{
var sourceimg = (Bitmap)e.Arguments[0];
ContrastStretch filter = new ContrastStretch();
sourceimg = filter.Apply(sourceimg);
sourceimg = filter.Apply(sourceimg);
sourceimg = filter.Apply(sourceimg);
Median f1 = new Median();
sourceimg = f1.Apply(sourceimg);
sourceimg = f1.Apply(sourceimg);
sourceimg = f1.Apply(sourceimg);
Blur filter2 = new Blur();
sourceimg = filter2.Apply(sourceimg);
sourceimg = filter2.Apply(sourceimg);
//sourceimg.Save("d:\\tst.jpg", ImageFormat.Jpeg);
//System.Diagnostics.Process.Start("d:\\tst.jpg");
com.google.zxing.LuminanceSource source = new RGBLuminanceSource(sourceimg, sourceimg.Width, sourceimg.Height);
com.google.zxing.Binarizer binarizer = new com.google.zxing.common.HybridBinarizer(source);
com.google.zxing.qrcode.QRCodeReader reader = new com.google.zxing.qrcode.QRCodeReader();
var result = reader.decode(new com.google.zxing.BinaryBitmap(binarizer));
e.Result = result.Text;
}
catch (Exception ex)
{
e.Result = "12323123213123";
this.Warn(ex, this.Messages("qrFail"));
}
}
private void ScanPreviewBuffer()
{
if (_photoCamera == null) return;
if (!_initialized) return;
try
{
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var binarizer = new com.google.zxing.common.HybridBinarizer(_luminance);
var binBitmap = new BinaryBitmap(binarizer);
var result = _reader.decode(binBitmap);
OnDecodingCompleted(result);
}
catch (Exception)
{
// If decoding fails it will throw a ReaderException
// and we're not interested in doing anything with it
}
}
private void ProcessImage(BarcodeCaptureResult captureResults) {
captureResults.State = CaptureState.Processing;
try {
bool bIsReady = captureResults.isReadyForProcessing.WaitOne(3000);
if (!bIsReady) {
captureResults.State = CaptureState.UnknownError;
captureResults.ErrorMessage = "Error: Timeout waiting for images to be processed. Please try again or send issue report using app bar.";
return;
}
if (captureResults.VGABarcodeImage != null)
{
var wb = captureResults.VGABarcodeImage;
//Code from: btnReadTag_Click in "SLZXingQRSample\SLZXingQRSample\SLZXingSample\MainPage.xaml.vb"
var qrRead = new com.google.zxing.oned.MultiFormatUPCEANReader(zxingHints); ; // new com.google.zxing.qrcode.QRCodeReader();
var luminiance = new RGBLuminanceSource(wb, 640, 480);
var binarizer = new com.google.zxing.common.HybridBinarizer(luminiance);
var binBitmap = new com.google.zxing.BinaryBitmap(binarizer);
var results = qrRead.decode(binBitmap, zxingHints); //NOTE: will throw exception if cannot decode image.
captureResults.BarcodeText = results.Text;
captureResults.State = CaptureState.Success;
BarcodeCaptured.Invoke(captureResults);
//captureResults.ProcessValue();
}
else {
captureResults.State = CaptureState.UnknownError;
captureResults.ErrorMessage = "Cannot process image: invalid or null BitmapImage.";
}
}
catch (Exception ex) {
captureResults.ExceptionThrown = ex;
if (ex is com.google.zxing.ReaderException) {
captureResults.ErrorMessage = "Error: Cannot decode barcode image. Please make sure scan mode is correct and try again.";
captureResults.State = CaptureState.ScanFailed;
}
else {
Debug.WriteLine("Error: " + ex.ToString());
captureResults.ErrorMessage = String.Format("Barcode Library Processing Error: {0}\r\n{1}", ex.GetType(), ex.Message);
captureResults.State = CaptureState.UnknownError;
}
}
finally
{
lock (_resultTaskLock)
{
_resultTask = null;
}
}
}
/// <summary>
/// This code should be run on a background thread to prevent UI lockup issues.
/// For information about background threads see http://msdn.microsoft.com/en-us/library/ff967560(VS.92).aspx#BKMK_Background
/// </summary>
private static void ProcessImage()
{
LastCaptureResults.State = CaptureState.Processing;
try
{
bool bIsReady = LastCaptureResults.isReadyForProcessing.WaitOne(3000);
if (!bIsReady)
{
LastCaptureResults.State = CaptureState.UnknownError;
LastCaptureResults.ErrorMessage = "Error: Timeout waiting for images to be processed. Please try again or send issue report using app bar.";
return;
}
StartProgress();
if (LastCaptureResults.BarcodeImage != null)
{
var wb = LastCaptureResults.VGABarcodeImage;
//Code from: btnReadTag_Click in "SLZXingQRSample\SLZXingQRSample\SLZXingSample\MainPage.xaml.vb"
var qrRead = GetReader(); // new com.google.zxing.qrcode.QRCodeReader();
var luminiance = new RGBLuminanceSource(wb, wb.PixelWidth, wb.PixelHeight);
var binarizer = new com.google.zxing.common.HybridBinarizer(luminiance);
var binBitmap = new com.google.zxing.BinaryBitmap(binarizer);
var results = qrRead.decode(binBitmap, zxingHints); //NOTE: will throw exception if cannot decode image.
LastCaptureResults.BarcodeText = results.Text;
LastCaptureResults.State = CaptureState.Success;
LastCaptureResults.ProcessValue();
}
else
{
LastCaptureResults.State = CaptureState.UnknownError;
LastCaptureResults.ErrorMessage = "Cannot process image: invalid or null BitmapImage.";
}
}
catch (Exception ex)
{
LastCaptureResults.ExceptionThrown = ex;
if (ex is com.google.zxing.ReaderException)
{
LastCaptureResults.ErrorMessage = "Error: Cannot decode barcode image. Please make sure scan mode is correct and try again.";
LastCaptureResults.State = CaptureState.ScanFailed;
}
else
{
Debug.WriteLine("Error: " + ex.ToString());
LastCaptureResults.ErrorMessage = String.Format("Barcode Library Processing Error: {0}\r\n{1}", ex.GetType(), ex.Message);
LastCaptureResults.State = CaptureState.UnknownError;
}
}
finally
{
ExecuteCallback();
}
}
