private void Scan()
{
try
{
Camera.GetPreviewBufferY(decoder.PreviewBufferY); //get the image
result = decoder.Decode(); //try to decode
cancel = true; //signal success
}
catch //decode was not successful
{ }
}
private void ScanPreviewBuffer()
{
if (_luminance == null)
{
return;
}
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
// use a dummy writeable bitmap because the luminance values are written directly to the luminance buffer
var result = _reader.Decode(dummyBitmap);
Dispatcher.BeginInvoke(() => DisplayResult(result));
}
private void ScanPreviewBuffer()
{
if (_photoCamera == null)
{
return;
}
if (!_initialized)
{
return;
}
// Don't scan too frequently
// Check the minimum time between frames
// as well as the min time between continuous scans
var msSinceLastPreview = (DateTime.UtcNow - _lastAnalysis).TotalMilliseconds;
if ((DateTime.UtcNow - _lastAnalysis).TotalMilliseconds < Options.DelayBetweenAnalyzingFrames ||
(_wasScanned && msSinceLastPreview < Options.DelayBetweenContinuousScans))
{
return;
}
if (!IsAnalyzing)
{
return;
}
_wasScanned = false;
_lastAnalysis = DateTime.UtcNow;
try
{
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var binarizer = new ZXing.Common.HybridBinarizer(_luminance);
var binBitmap = new BinaryBitmap(binarizer);
var result = _reader.decode(binBitmap);
if (result != null)
{
_wasScanned = true;
OnDecodingCompleted(result);
}
}
catch (Exception)
{
// If decoding fails it will throw a ReaderException
// and we're not interested in doing anything with it
}
}
private void ScanPreviewBuffer()
{
try
{
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var binarizer = new HybridBinarizer(_luminance);
var binBitmap = new BinaryBitmap(binarizer);
var result = _reader.decode(binBitmap);
Dispatcher.BeginInvoke(() => DisplayResult(result.Text));
}
catch
{
}
}
private void ScanPreviewBuffer()
{
try
{
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var result = _reader.Decode(dummyBitmap);
if (result != null) // BV line added
{
Dispatcher.BeginInvoke(() => DisplayResult(result.Text));
}
}
catch
{
}
}
private void ScanPreviewBuffer()
{
try
{
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var result = _reader.Decode(_luminance);
if (result != null)
{
Dispatcher.BeginInvoke(() => DisplayResult(string.Format("{0} - {1}", result.BarcodeFormat, result.Text)));
}
}
catch
{
}
}
private void ScanPreviewBuffer()
{
try {
photoCamera.GetPreviewBufferY(luminance.PreviewBufferY);
var binarizer = new HybridBinarizer(luminance);
var binBitmap = new BinaryBitmap(binarizer);
var result = reader.decode(binBitmap);
if (result != null)
{
Dispatcher.BeginInvoke(() => Synchronize(result.Text));
}
}
catch {
}
}
private void ScanPreviewBuffer()
{
if (luminance == null)
{
return;
}
photoCamera.GetPreviewBufferY(luminance.PreviewBufferY);
// use a dummy writeable bitmap because the luminance values are written directly to the luminance buffer
var result = reader.Decode(dummyBitmap);
if (result != null)
{
viewModel.Scanned(result.Text);
}
}
private Result AnalyseFrame()
{
if (_currentCamera == null)
{
return(null);
}
var width = Convert.ToInt32(_currentCamera.PreviewResolution.Width);
var height = Convert.ToInt32(_currentCamera.PreviewResolution.Height);
var previewBuffer = new byte[width * height];
_currentCamera.GetPreviewBufferY(previewBuffer);
Result result = _barcodeReader.Decode(previewBuffer, width, height, RGBLuminanceSource.BitmapFormat.Gray8);
return(result);
}
private void ScanPreviewBuffer()
{
try {
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var binarizer = new HybridBinarizer(_luminance);
var binBitmap = new BinaryBitmap(binarizer);
var result = _reader.decode(binBitmap);
if (result != null)
{
Dispatcher.BeginInvoke(() => DisplayResult(result.Text));
var client = new WebClient();
var sqrl = new SqrlUrl(result.Text);
var nonce = SqrlUtils.CreateClientNonce();
client.DownloadStringAsync(new Uri(sqrl.GetClientResponse(nonce)));
}
} catch {
}
}
/// <summary>
/// Scans the camera's preview buffer for a QR code.
/// </summary>
private void ScanPreviewBuffer()
{
int width = (int)_camera.PreviewResolution.Width;
int height = (int)_camera.PreviewResolution.Height;
byte[] pixelData = new byte[width * height];
_camera.GetPreviewBufferY(pixelData);
var luminance = new RGBLuminanceSource(pixelData, width, height, RGBLuminanceSource.BitmapFormat.Gray8);
var binarizer = new HybridBinarizer(luminance);
var bitmap = new BinaryBitmap(binarizer);
var result = new QRCodeReader().decode(bitmap);
if (result != null)
{
Dispatcher.BeginInvoke(() => ProcessResult(result));
}
}
private void ScanPreviewBuffer()
{
try
{
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
#if USE_ORIGINAL_IMPLEMENTATION
var binarizer = new HybridBinarizer(_luminance);
var binBitmap = new BinaryBitmap(binarizer);
var result = _reader.decode(binBitmap);
#else
var result = _reader.Decode(_dummy);
#endif
if (result != null)
{
Dispatcher.BeginInvoke(() => DisplayResult(result.Text));
}
}
catch
{
}
}
private void ScanPreviewBuffer()
{
try
{
lblQR.Text = "No se detecta ningún código QR";
_photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
var binarizer = new HybridBinarizer(_luminance);
var binBitmap = new BinaryBitmap(binarizer);
var result = _reader.decode(binBitmap);
var scan = result.Text;
lblQR.Text = "Escanea un código de Museos App";
//System.Media.SystemSounds.Beep.Play();
//System.Media.SystemSounds.Asterisk.Play();
//SystemSounds.Beep.Play();
/*Stream stream = TitleContainer.OpenStream("/Assets/cartel.mp3");
* SoundEffect effect = SoundEffect.FromStream(stream);
* FrameworkDispatcher.Update();
* effect.Play();*/
//mediaElement.Play();
var textId = scan.Remove(0, 42);
System.Diagnostics.Debug.WriteLine("ID DEL TEXTO: " + textId);
var textQR = scan.Remove(42, 1);
System.Diagnostics.Debug.WriteLine("TEXTO DEL QR: " + textQR);
if (textQR.Equals("http://museosapp.azurewebsites.net/Piezas/"))
{
lblQR.Text = "Código QR correcto";
NavigationService.Navigate(new Uri("/InfoQR.xaml?id=" + textId, UriKind.Relative));
_timer.Stop();
}
Dispatcher.BeginInvoke(() => DisplayResult(result.Text));
}
catch
{
}
}
/// <summary>
/// Copies the luminance data for the current viewfinder frame into a buffer for further manipulation.
/// </summary>
/// <param name="pixelData">The YCrCb pixel data.</param>
/// <remarks>
/// This method is already protected and only called when the service is currently running.
/// </remarks>
protected override void GetPreviewBufferYFromCamera(byte[] pixelData)
{
_photoCamera.GetPreviewBufferY(pixelData);
}
/// <summary>
/// Copies the luminance data for the current viewfinder frame into a buffer for further manipulation.
/// </summary>
/// <param name="pixelData">The YUV pixel data.</param>
public void GetPreviewBufferY(byte[] pixelData)
{
_photoCamera.GetPreviewBufferY(pixelData);
}
private void Detect()
{
if (isDetecting || !isInitialized)
{
return;
}
isDetecting = true;
var stopwatch = Stopwatch.StartNew();
try
{
// Update buffer size
var pixelWidth = (int)photoCamera.PreviewResolution.Width;
var pixelHeight = (int)photoCamera.PreviewResolution.Height;
if (buffer == null || buffer.Length != pixelWidth * pixelHeight)
{
buffer = new byte[pixelWidth * pixelHeight];
// Create constant transformations instances
// Center at origin of the 256x256 controls
centerAtOrigin = Matrix3DFactory.CreateTranslation(-128, -128, 0);
// Swap the y-axis and scale down by half
scale = Matrix3DFactory.CreateScale(0.5, -0.5, 0.5);
// Viewport transformation
viewport = Matrix3DFactory.CreateViewportTransformation(pixelWidth, pixelHeight);
matrix3DProjection = new Matrix3DProjection();
Txt.Projection = matrix3DProjection;
Img.Projection = matrix3DProjection;
}
// Grab snapshot
photoCamera.GetPreviewBufferY(buffer);
// Detect
var dr = arDetector.DetectAllMarkers(buffer, pixelWidth, pixelHeight);
// Draw the detected squares
//bitmap.Clear();
//ViewportOverlay.Source = bitmap;
// Calculate the projection matrix
if (dr.HasResults)
{
// Calculate the complete transformation matrix based on the first detection result
var world = centerAtOrigin * scale * dr[0].Transformation;
// Calculate the final transformation matrix by using the camera projection matrix
var m = Matrix3DFactory.CreateViewportProjection(world, Matrix3D.Identity, arDetector.Projection, viewport);
// Apply the final transformation matrix to the TextBox
matrix3DProjection.ProjectionMatrix = m;
//// Draw the detected squares
//foreach (var r in dr)
//{
// bitmap.DrawQuad((int)r.Square.P1.X, (int)r.Square.P1.Y, (int)r.Square.P2.X, (int)r.Square.P2.Y, (int)r.Square.P3.X, (int)r.Square.P3.Y, (int)r.Square.P4.X, (int)r.Square.P4.Y, Colors.Red);
//}
}
}
finally
{
isDetecting = false;
stopwatch.Stop();
TxtDiag.Text = string.Format("{0} ms", stopwatch.ElapsedMilliseconds);
}
}
//オートフォーカスが完了したら呼び出される
void camera_AutoFocusCompleted(object sender, CameraOperationCompletedEventArgs e)
{
//アマゾンからデータを取得するインスタンスにイベントハンドラを追加
//AmazonWebService aws = new AmazonWebService();
//aws.Comp += new AmazonWebService.GetItemInfoFromAmazonCompletedEventHandler(this.aws_GetItemInfoFromAmazonCompleted);
//ItemData itemData = new ItemData();
//cameraインスタンスがnullの場合は即return。そうしないと下の「プレビューフレームの取得」でnullreferenceexceptionが出てしまう。readTimerとのタイミングの問題か？
if (camera == null)
{
return;
}
// コントロールへのアクセスを行うのでUIスレッドにて非同期で実行。UIへのアクセスは別のスレッドからはできないため。
Dispatcher.BeginInvoke(() =>
{
// プレビューフレームの取得
var luminanceSource = new PreviewFrameLuminanceSource((int)camera.PreviewResolution.Width, (int)camera.PreviewResolution.Height);
camera.GetPreviewBufferY(luminanceSource.Buffer);
// リーダーインスタンス生成
var reader = new EAN13Reader();
// バーコード解析用のBitmapを作成
var binarizer = new HybridBinarizer(luminanceSource);
var binBitmap = new BinaryBitmap(binarizer);
Result result = null;
try
{
// バーコードの解析(デコード)を行う。
//resultにEANが入る。
result = reader.decode(binBitmap);
}
catch (ReaderException)
{
// プレビューフレーム内にバーコードが見つからなかった場合
// 読み取り例外のReaderExceptionが発行されてしまう
TextBlock_Result.Text = "Can not read barcode.";
return;
}
catch (Exception ex)
{
throw ex;
}
//読み取ったEANがデータベースに登録済みかチェック
if (BookView.Exist(result.Text) != null)
{
//登録済みの場合
TextBlock_Result.Text = result.Text + " is exists";
}
else
{
//未登録の場合。Amazonへリクエスト
TargetEAN = result.Text;
aws = new AmazonWebService(result.Text);
//アマゾンからデータを取得するインスタンスにイベントハンドラを追加
aws.GetItemInfoFromAmazonCompleted += new AmazonWebService.GetItemInfoFromAmazonCompletedEventHandler(this.aws_GetItemInfoFromAmazonCompleted);
aws.GetItemInfo();
}
});
//イベントを削除
camera.AutoFocusCompleted -= camera_AutoFocusCompleted;
}
public void GetImageTexture(int[] returnImage, byte[] imagePtr)
{
if (cameraInitialized && cameraReady)
{
if (returnImage != null)
{
if (UseLuminance)
{
camera.GetPreviewBufferY(luminance);
for (int i = 0; i < returnImage.Length; ++i)
{
returnImage[i] = (int)(luminance[i] << 16 | luminance[i] << 8 | luminance[i]);
}
}
else
{
camera.GetPreviewBufferArgb32(returnImage);
byte r, g, b;
for (int i = 0; i < returnImage.Length; ++i)
{
r = (byte)(returnImage[i]);
g = (byte)(returnImage[i] >> 8);
b = (byte)(returnImage[i] >> 16);
returnImage[i] = (int)(r << 16 | g << 8 | b);
}
}
}
if (imagePtr != null)
{
switch (format)
{
case ImageFormat.B8G8R8A8_32:
if (returnImage != null)
{
Buffer.BlockCopy(returnImage, 0, imagePtr, 0, imagePtr.Length);
}
else
{
try
{
if (UseLuminance)
{
camera.GetPreviewBufferY(luminance);
// Here, we assume the resizer is HalfResizer and instead of using
// the HalfResizer to resize the pixel data, it's much faster to
// do it here directly
if (resizer != null)
{
int srcIndex = 0;
int destIndex = 0;
for (int j = 0; j < cameraHeight; j += 2)
{
for (int i = 0; i < cameraWidth; i += 2, destIndex += 4)
{
imagePtr[destIndex] = imagePtr[destIndex + 1] =
imagePtr[destIndex + 2] = luminance[srcIndex];
srcIndex += 2;
}
srcIndex += cameraWidth;
}
}
else
{
for (int i = 0, j = 0; i < imagePtr.Length; i += 4, ++j)
{
imagePtr[i] = imagePtr[i + 1] = imagePtr[i + 2] = luminance[j];
}
}
}
else
{
if (color == null)
{
color = new int[imagePtr.Length / 4];
}
camera.GetPreviewBufferArgb32(color);
for (int i = 0; i < imagePtr.Length; i += 4)
{
imagePtr[i] = (byte)(color[i]);
imagePtr[i + 1] = (byte)(color[i] >> 8);
imagePtr[i + 2] = (byte)(color[i] >> 16);
}
}
}
catch (Exception exp) { }
}
break;
default:
throw new GoblinException("Currently " + format + " is not supported");
}
}
}
}