public void PictureTaken(object sender, ProcessedCameraPreview.PictureTakenEventArgs ea)
{
Android.Graphics.Bitmap bmp = ea.Bitmap;
Camera camera = ea.Camera;
try
{
Android.Graphics.Bitmap thumbnail = null;
int maxThumbnailSize = 96;
if (_imageFilter == null)
{
_lastSavedImageFile = ProcessedCameraPreview.SaveBitmap(this, bmp, PackageName, _topLayer);
thumbnail = ProcessedCameraPreview.GetThumbnail(bmp, maxThumbnailSize);
bmp.Dispose();
}
else
{
Image<Bgr, Byte> buffer1 = new Image<Bgr, byte>(bmp);
bmp.Dispose();
using (ImageFilter filter = _imageFilter.Clone() as ImageFilter)
{
if (filter is DistorFilter)
{
//reduce the image size to half because the distor filter used lots of memory
Image<Bgr, Byte> tmp = buffer1.PyrDown();
buffer1.Dispose();
buffer1 = tmp;
}
if (filter.InplaceCapable)
filter.ProcessData(buffer1.Mat, buffer1.Mat);
else
{
Image<Bgr, Byte> buffer2 = new Image<Bgr, byte>(buffer1.Size);
filter.ProcessData(buffer1.Mat, buffer2.Mat);
buffer1.Dispose();
buffer1 = buffer2;
}
}
using (Android.Graphics.Bitmap result = buffer1.ToBitmap())
{
buffer1.Dispose();
_lastSavedImageFile = ProcessedCameraPreview.SaveBitmap(this, result, PackageName, _topLayer);
thumbnail = ProcessedCameraPreview.GetThumbnail(result, maxThumbnailSize);
}
}
_lastCapturedImageButton.SetImageBitmap(thumbnail);
}
catch (Exception excpt)
{
this.RunOnUiThread(() =>
{
while (excpt.InnerException != null)
excpt = excpt.InnerException;
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.SetTitle("Error saving file");
alert.SetMessage(excpt.Message);
alert.SetPositiveButton("OK", (s, er) => { });
alert.Show();
});
return;
}
/*
catch (FileNotFoundException e)
{
Android.Util.Log.Debug("Emgu.CV", e.Message);
}
catch (IOException e)
{
Android.Util.Log.Debug("Emgu.CV", e.Message);
} */
/*
try
{
ExifInterface exif = new ExifInterface(f.FullName);
// Read the camera model and location attributes
exif.GetAttribute(ExifInterface.TagModel);
float[] latLng = new float[2];
exif.GetLatLong(latLng);
// Set the camera make
exif.SetAttribute(ExifInterface.TagMake, "My Phone");
exif.SetAttribute(ExifInterface.TagDatetime, System.DateTime.Now.ToString());
}
catch (IOException e)
{
Android.Util.Log.Debug("Emgu.CV", e.Message);
}*/
Toast.MakeText(this, "File Saved.", ToastLength.Short).Show();
camera.StartPreview();
}
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
RequestWindowFeature(WindowFeatures.NoTitle);
bool cameraPreviewCallbackWithBuffer = false;
SetContentView(Resource.Layout.CameraPreviewLayout);
_bgrBuffers = new ImageBufferFactory<Mat>(size => new Mat(size.Height, size.Width, DepthType.Cv8U, 3));
_previewBitmapBuffers = new ImageBufferFactory<Android.Graphics.Bitmap>(s => Android.Graphics.Bitmap.CreateBitmap(s.Width, s.Height, Android.Graphics.Bitmap.Config.Rgb565));
_topLayer = new ProcessedCameraPreview(this, cameraPreviewCallbackWithBuffer);
_topLayer.PictureTaken += this.PictureTaken;
_topLayer.ImagePreview += this.ImagePreview;
_preview = new CameraPreview(this, _topLayer, cameraPreviewCallbackWithBuffer);
RelativeLayout mainLayout = FindViewById<RelativeLayout>(Resource.Id.CameraPreiewRelativeLayout);
mainLayout.AddView(_preview, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FillParent, ViewGroup.LayoutParams.FillParent));
mainLayout.AddView(_topLayer, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FillParent, ViewGroup.LayoutParams.FillParent));
#if GL_VIEW
_topLayer.SetZOrderOnTop(true);
#endif
RequestedOrientation = Android.Content.PM.ScreenOrientation.Landscape;
ImageButton switchCameraButton = FindViewById<ImageButton>(Resource.Id.CameraPreviewSwitchCameraImageButton);
if (Camera.NumberOfCameras <= 1)
switchCameraButton.Visibility = ViewStates.Invisible;
else
{
switchCameraButton.BringToFront();
}
switchCameraButton.Click += delegate
{
_preview.SwitchCamera();
};
ImageButton captureImageButton = FindViewById<ImageButton>(Resource.Id.CameraPreviewCaptureImageButton);
captureImageButton.Click += delegate
{
Camera camera = _preview.Camera;
if (camera != null)
{
Camera.Parameters p = camera.GetParameters();
p.PictureFormat = Android.Graphics.ImageFormatType.Jpeg;
//p.PictureFormat = Android.Graphics.ImageFormatType.Rgb565;
camera.SetParameters(p);
camera.TakePicture(null, null, _topLayer);
}
};
_lastCapturedImageButton = FindViewById<ImageButton>(Resource.Id.capturedImageButton);
_lastCapturedImageButton.Click += delegate
{
if (_lastSavedImageFile != null)
{
Intent intent = new Intent(Intent.ActionView, Android.Net.Uri.FromFile(new Java.IO.File(_lastSavedImageFile.FullName)));
intent.SetType("image/jpeg");
StartActivity(intent);
}
};
_lastCapturedImageButton.BringToFront();
_previewButtons = new ImageButton[4];
_previewFilters = new ImageFilter[4];
_previewButtons[0] = FindViewById<ImageButton>(Resource.Id.previewImageButton);
_previewFilters[0] = null;
_previewButtons[0].Click += delegate
{
if (_imageFilter != null)
{
_imageFilter.Dispose();
_imageFilter = null;
}
};
_previewButtons[1] = FindViewById<ImageButton>(Resource.Id.cannyImageButton);
_previewFilters[1] = new CannyFilter(100, 60, 3);
_previewButtons[2] = FindViewById<ImageButton>(Resource.Id.colorMapImageButton);
_previewFilters[2] = new ColorMapFilter(Emgu.CV.CvEnum.ColorMapType.Autumn);
//_previewFilters[3] = new ColorMapFilter(Emgu.CV.CvEnum.ColorMapType.Summer);
//_previewFilters[3] = null;
_previewButtons[3] = FindViewById<ImageButton>(Resource.Id.distorImageButton);
_previewFilters[3] = new DistorFilter(0.5, 0.5, -1.5);
for (int i = 1; i < _previewButtons.Length; ++i)
{
ImageFilter f = _previewFilters[i];
_previewButtons[i].Click += delegate
{
if (_imageFilter != null)
_imageFilter.Dispose();
_imageFilter = f.Clone() as ImageFilter;
};
}
}
public void ImagePreview(Object sender, ProcessedCameraPreview.ImagePreviewEventArgs e)
{
Image<Gray, Byte> yuv420sp = e.Yuv420sp;
Image<Bgr, Byte> image = e.Result;
#region get the thumbnail size buffer
Size s = image.Size;
int maxDimension = 96;
int width = maxDimension;
int height = maxDimension;
if (s.Width > s.Height)
{
height = maxDimension * s.Height / s.Width;
}
else
{
width = maxDimension * s.Width / s.Height;
}
s.Width = width;
s.Height = height;
Mat thumbnail = _bgrBuffers.GetBuffer(s, 1);
#endregion
if (_imageFilter == null)
{
CvInvoke.CvtColor(yuv420sp, image, Emgu.CV.CvEnum.ColorConversion.Yuv420Sp2Bgr);
CvInvoke.Resize(image, thumbnail, s, 0, 0, Emgu.CV.CvEnum.Inter.Nearest);
}
else
{
Mat bgr = _bgrBuffers.GetBuffer(image.Size, 0);
CvInvoke.CvtColor(yuv420sp, bgr, Emgu.CV.CvEnum.ColorConversion.Yuv420Sp2Bgr);
lock (typeof(ImageFilter))
_imageFilter.ProcessData(bgr, image.Mat);
CvInvoke.Resize(bgr, thumbnail, s, 0, 0, Emgu.CV.CvEnum.Inter.Nearest);
}
{
Android.Graphics.Bitmap thumbnailBmp = _previewBitmapBuffers.GetBuffer(s, 0);
using (BitmapRgb565Image img565 = new BitmapRgb565Image(thumbnailBmp))
img565.ConvertFrom(thumbnail);
_previewButtons[0].SetImageBitmap(thumbnailBmp);
int startBufferIndex = 2;
for (int i = 1; i < _previewFilters.Length; i++)
{
Mat buffer = _bgrBuffers.GetBuffer(s, startBufferIndex + i - 1);
_previewFilters[i].ProcessData(thumbnail, buffer);
Android.Graphics.Bitmap bmp = _previewBitmapBuffers.GetBuffer(s, i);
using (BitmapRgb565Image tmp = new BitmapRgb565Image(bmp))
{
tmp.ConvertFrom(buffer);
}
_previewButtons[i].SetImageBitmap(bmp);
}
} /*
catch (Exception excpt)
{
while (excpt.InnerException != null)
excpt = excpt.InnerException;
Android.Util.Log.Debug("Emgu.CV", String.Format("Failed to generate preview: {0}", excpt.Message));
}*/
}
