private byte[] ConvertYuvToJpeg (byte[] yuvData, Android.Hardware.Camera camera) { var cameraParameters = camera.GetParameters (); var width = cameraParameters.PreviewSize.Width; var height = cameraParameters.PreviewSize.Height; var yuv = new YuvImage (yuvData, cameraParameters.PreviewFormat, width, height, null); var ms = new MemoryStream (); var quality = 80; // adjust this as needed yuv.CompressToJpeg (new Rect (0, 0, width, height), quality, ms); var jpegData = ms.ToArray (); return jpegData; }
public void OnPreviewFrame(byte [] bytes, Android.Hardware.Camera camera) { if (!isAnalyzing) return; //Check and see if we're still processing a previous frame if (processingTask != null && !processingTask.IsCompleted) return; if ((DateTime.UtcNow - lastPreviewAnalysis).TotalMilliseconds < options.DelayBetweenAnalyzingFrames) return; // Delay a minimum between scans if (wasScanned && ((DateTime.UtcNow - lastPreviewAnalysis).TotalMilliseconds < options.DelayBetweenContinuousScans)) return; wasScanned = false; var cameraParameters = camera.GetParameters(); var width = cameraParameters.PreviewSize.Width; var height = cameraParameters.PreviewSize.Height; //var img = new YuvImage(bytes, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null); lastPreviewAnalysis = DateTime.UtcNow; processingTask = Task.Factory.StartNew (() => { try { if (barcodeReader == null) { barcodeReader = new BarcodeReader (null, null, null, (p, w, h, f) => new PlanarYUVLuminanceSource (p, w, h, 0, 0, w, h, false)); //new PlanarYUVLuminanceSource(p, w, h, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false)) if (this.options.TryHarder.HasValue) barcodeReader.Options.TryHarder = this.options.TryHarder.Value; if (this.options.PureBarcode.HasValue) barcodeReader.Options.PureBarcode = this.options.PureBarcode.Value; if (!string.IsNullOrEmpty (this.options.CharacterSet)) barcodeReader.Options.CharacterSet = this.options.CharacterSet; if (this.options.TryInverted.HasValue) barcodeReader.TryInverted = this.options.TryInverted.Value; if (this.options.PossibleFormats != null && this.options.PossibleFormats.Count > 0) { barcodeReader.Options.PossibleFormats = new List<BarcodeFormat> (); foreach (var pf in this.options.PossibleFormats) barcodeReader.Options.PossibleFormats.Add (pf); } } bool rotate = false; int newWidth = width; int newHeight = height; var cDegrees = getCameraDisplayOrientation(this.activity); if (cDegrees == 90 || cDegrees == 270) { rotate = true; newWidth = height; newHeight = width; } if (rotate) bytes = rotateYUV420Degree90(bytes, width, height);//rotateCounterClockwise(bytes, width, height); var result = barcodeReader.Decode (bytes, newWidth, newHeight, RGBLuminanceSource.BitmapFormat.Unknown); if (result == null || string.IsNullOrEmpty (result.Text)) return; Android.Util.Log.Debug (MobileBarcodeScanner.TAG, "Barcode Found: " + result.Text); var img = new YuvImage(bytes, cameraParameters.PreviewFormat, newWidth, newHeight, null); System.IO.MemoryStream outStream = new System.IO.MemoryStream(); bool didIt = img.CompressToJpeg(new Rect(0,0,newWidth, newHeight), 75, outStream); outStream.Seek(0, System.IO.SeekOrigin.Begin); Bitmap newBM = BitmapFactory.DecodeStream(outStream); result.CaptureImage = newBM; wasScanned = true; callback (result); } catch (ReaderException) { Android.Util.Log.Debug (MobileBarcodeScanner.TAG, "No barcode Found"); // ignore this exception; it happens every time there is a failed scan } catch (Exception) { // TODO: this one is unexpected.. log or otherwise handle it throw; } }); }
public void OnPreviewFrame (byte [] bytes, Android.Hardware.Camera camera) { //Check and see if we're still processing a previous frame if (processingTask != null && !processingTask.IsCompleted) return; if ((DateTime.UtcNow - lastPreviewAnalysis).TotalMilliseconds < options.DelayBetweenAnalyzingFrames) return; var cameraParameters = camera.GetParameters(); var width = cameraParameters.PreviewSize.Width; var height = cameraParameters.PreviewSize.Height; //var img = new YuvImage(bytes, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null); lastPreviewAnalysis = DateTime.UtcNow; processingTask = Task.Factory.StartNew (() => { try { if (barcodeReader == null) { barcodeReader = new BarcodeReader (null, null, null, (p, w, h, f) => new PlanarYUVLuminanceSource (p, w, h, 0, 0, w, h, false)); //new PlanarYUVLuminanceSource(p, w, h, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false)) if (this.options.TryHarder.HasValue) barcodeReader.Options.TryHarder = this.options.TryHarder.Value; if (this.options.PureBarcode.HasValue) barcodeReader.Options.PureBarcode = this.options.PureBarcode.Value; if (!string.IsNullOrEmpty (this.options.CharacterSet)) barcodeReader.Options.CharacterSet = this.options.CharacterSet; if (this.options.TryInverted.HasValue) barcodeReader.TryInverted = this.options.TryInverted.Value; if (this.options.PossibleFormats != null && this.options.PossibleFormats.Count > 0) { barcodeReader.Options.PossibleFormats = new List<BarcodeFormat> (); foreach (var pf in this.options.PossibleFormats) barcodeReader.Options.PossibleFormats.Add (pf); } } bool rotate = false; int newWidth = width; int newHeight = height; var cDegrees = getCameraDisplayOrientation(this.activity); if (cDegrees == 90 || cDegrees == 270) { rotate = true; newWidth = height; newHeight = width; } var start = PerformanceCounter.Start(); if (rotate) bytes = rotateCounterClockwise(bytes, width, height); var result = barcodeReader.Decode (bytes, newWidth, newHeight, RGBLuminanceSource.BitmapFormat.Unknown); PerformanceCounter.Stop(start, "Decode Time: {0} ms (width: " + width + ", height: " + height + ", degrees: " + cDegrees + ", rotate: " + rotate + ")"); if (result == null || string.IsNullOrEmpty (result.Text)) return; Android.Util.Log.Debug ("ZXing.Mobile", "Barcode Found: " + result.Text); ShutdownCamera (); callback (result); } catch (ReaderException) { Android.Util.Log.Debug ("ZXing.Mobile", "No barcode Found"); // ignore this exception; it happens every time there is a failed scan } catch (Exception) { // TODO: this one is unexpected.. log or otherwise handle it throw; } }); }
public void OnPreviewFrame (byte [] bytes, Android.Hardware.Camera camera) { if ((DateTime.Now - lastPreviewAnalysis).TotalMilliseconds < options.DelayBetweenAnalyzingFrames) return; try { var cameraParameters = camera.GetParameters(); var img = new YuvImage(bytes, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null); if (barcodeReader == null) { barcodeReader = new BarcodeReader(null, null, null, (p, w, h, f) => new PlanarYUVLuminanceSource(p, w, h, 0, 0, w, h, false)); //new PlanarYUVLuminanceSource(p, w, h, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false)) if (this.options.TryHarder.HasValue) barcodeReader.Options.TryHarder = this.options.TryHarder.Value; if (this.options.PureBarcode.HasValue) barcodeReader.Options.PureBarcode = this.options.PureBarcode.Value; if (!string.IsNullOrEmpty (this.options.CharacterSet)) barcodeReader.Options.CharacterSet = this.options.CharacterSet; if (this.options.TryInverted.HasValue) barcodeReader.TryInverted = this.options.TryInverted.Value; if (this.options.PossibleFormats != null && this.options.PossibleFormats.Count > 0) { barcodeReader.Options.PossibleFormats = new List<BarcodeFormat>(); foreach (var pf in this.options.PossibleFormats) barcodeReader.Options.PossibleFormats.Add(pf); } //Always autorotate on android barcodeReader.AutoRotate = true; } //Try and decode the result var result = barcodeReader.Decode(img.GetYuvData(), img.Width, img.Height, RGBLuminanceSource.BitmapFormat.Unknown); lastPreviewAnalysis = DateTime.Now; if (result == null || string.IsNullOrEmpty (result.Text)) return; Android.Util.Log.Debug("ZXing.Mobile", "Barcode Found: " + result.Text); ShutdownCamera(); callback(result); } catch (ReaderException) { Android.Util.Log.Debug("ZXing.Mobile", "No barcode Found"); // ignore this exception; it happens every time there is a failed scan } catch (Exception) { // TODO: this one is unexpected.. log or otherwise handle it throw; } }
public void OnPreviewFrame (byte [] bytes, Android.Hardware.Camera camera) { if ((DateTime.Now - lastPreviewAnalysis).TotalMilliseconds < 150) return; try { //Fix for image not rotating on devices byte[] rotatedData = new byte[bytes.Length]; for (int y = 0; y < height; y++) { for (int x = 0; x < width; x++) rotatedData[x * height + height - y - 1] = bytes[x + y * width]; } var cameraParameters = camera.GetParameters(); //Changed to using a YUV Image to get the byte data instead of manually working with it! var img = new YuvImage(rotatedData, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null); var dataRect = GetFramingRectInPreview(); var luminance = new PlanarYUVLuminanceSource (img.GetYuvData(), width, height, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false); //var luminance = new PlanarYUVLuminanceSource(img.GetYuvData(), cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, 0, 0, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, false); var binarized = new BinaryBitmap (new ZXing.Common.HybridBinarizer(luminance)); var result = reader.decodeWithState(binarized); lastPreviewAnalysis = DateTime.Now; if (result == null || string.IsNullOrEmpty (result.Text)) return; Android.Util.Log.Debug("ZXing.Mobile", "Barcode Found: " + result.Text); ShutdownCamera(); activity.OnScan (result); } catch (ReaderException) { Android.Util.Log.Debug("ZXing.Mobile", "No barcode Found"); // ignore this exception; it happens every time there is a failed scan } catch (Exception){ // TODO: this one is unexpected.. log or otherwise handle it throw; } }
public void OnPreviewFrame (byte [] bytes, Android.Hardware.Camera camera) { if ((DateTime.Now - lastPreviewAnalysis).TotalMilliseconds < options.DelayBetweenAnalyzingFrames) return; try { /* OLD Android Code //Fix for image not rotating on devices byte[] rotatedData = new byte[bytes.Length]; for (int y = 0; y < height; y++) { for (int x = 0; x < width; x++) rotatedData[x * height + height - y - 1] = bytes[x + y * width]; } var cameraParameters = camera.GetParameters(); //Changed to using a YUV Image to get the byte data instead of manually working with it! var img = new YuvImage(rotatedData, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null); var dataRect = GetFramingRectInPreview(); var luminance = new PlanarYUVLuminanceSource (img.GetYuvData(), width, height, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false); //var luminance = new PlanarYUVLuminanceSource(img.GetYuvData(), cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, 0, 0, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, false); var binarized = new BinaryBitmap (new ZXing.Common.HybridBinarizer(luminance)); var result = reader.decodeWithState(binarized); */ var cameraParameters = camera.GetParameters(); var img = new YuvImage(bytes, ImageFormatType.Nv21, cameraParameters.PreviewSize.Width, cameraParameters.PreviewSize.Height, null); var dataRect = GetFramingRectInPreview(); //var barcodeReader = new BarcodeReader(null, p => new PlanarYUVLuminanceSource(img.GetYuvData(), img.Width, img.Height, dataRect.Left, dataRect.Top, // dataRect.Width(), dataRect.Height(), false), null, null) //{ // AutoRotate = true, // TryHarder = true, //}; var barcodeReader = new BarcodeReader(null, null, null, (p, w, h, f) => new PlanarYUVLuminanceSource(p, w, h, 0, 0, w, h, false)) //new PlanarYUVLuminanceSource(p, w, h, dataRect.Left, dataRect.Top, dataRect.Width(), dataRect.Height(), false)) { AutoRotate = true, TryHarder = false }; if (this.options.PureBarcode.HasValue && this.options.PureBarcode.Value) barcodeReader.PureBarcode = this.options.PureBarcode.Value; if (this.options.PossibleFormats != null && this.options.PossibleFormats.Count > 0) barcodeReader.PossibleFormats = this.options.PossibleFormats; var result = barcodeReader.Decode(img.GetYuvData(), img.Width, img.Height, RGBLuminanceSource.BitmapFormat.Unknown); lastPreviewAnalysis = DateTime.Now; if (result == null || string.IsNullOrEmpty (result.Text)) return; Android.Util.Log.Debug("ZXing.Mobile", "Barcode Found: " + result.Text); ShutdownCamera(); activity.OnScan (result); } catch (ReaderException) { Android.Util.Log.Debug("ZXing.Mobile", "No barcode Found"); // ignore this exception; it happens every time there is a failed scan } catch (Exception){ // TODO: this one is unexpected.. log or otherwise handle it throw; } }