/// <summary>
/// Draws the image captured from the camera.
/// </summary>
/// <param name="image">The image captured.</param>
private void DrawCapturedImage(Affdex.Frame image)
{
// Update the Image control from the UI thread
var result = this.Dispatcher.BeginInvoke((Action)(() =>
{
try
{
// Update the Image control from the UI thread
//cameraDisplay.Source = rtb;
cameraDisplay.Source = ConstructImage(image.getBGRByteArray(), image.getWidth(), image.getHeight());
// Allow N successive OnCapture callbacks before the FacePoint drawing canvas gets cleared.
if (++DrawSkipCount > 4)
{
canvas.Faces = new Dictionary<int, Affdex.Face>();
canvas.InvalidateVisual();
DrawSkipCount = 0;
}
if (image != null)
{
image.Dispose();
}
}
catch (Exception ex)
{
String message = String.IsNullOrEmpty(ex.Message) ? "AffdexMe error encountered." : ex.Message;
ShowExceptionAndShutDown(message);
}
}));
}
private void DisplayImageToOffscreenCanvas(Affdex.Frame image)
{
// Update the Image control from the UI thread
var result = this.Dispatcher.BeginInvoke((Action)(() =>
{
try
{
mCurrentTimeStamp = image.getTimestamp();
// Update the Image control from the UI thread
//imgAffdexFaceDisplay.Source = rtb;
imgAffdexFaceDisplay.Source = ConstructImage(image.getBGRByteArray(), image.getWidth(), image.getHeight());
// Allow N successive OnCapture callbacks before the FacePoint drawing canvas gets cleared.
if (++mFeaturePointsSkipCount > 4)
{
canvasFacePoints.Children.Clear();
mFeaturePointsSkipCount = 0;
}
if (image != null)
{
image.Dispose();
}
}
catch (Exception ex)
{
String message = String.IsNullOrEmpty(ex.Message) ? "AffdexMe error encountered." : ex.Message;
ShowExceptionAndShutDown(message);
}
}));
}
/// <summary>
/// Draws the facial analysis captured by Affdex.Detector.
/// </summary>
/// <param name="image">The image analyzed.</param>
/// <param name="faces">The faces found in the image analyzed.</param>
private void DrawData(Affdex.Frame image, Dictionary<int, Affdex.Face> faces)
{
try
{
// Plot Face Points
if (faces != null)
{
var result = this.Dispatcher.BeginInvoke((Action)(() =>
{
if ((Detector != null) && (Detector.isRunning()))
{
canvas.Faces = faces;
canvas.Width = cameraDisplay.ActualWidth;
canvas.Height = cameraDisplay.ActualHeight;
canvas.XScale = canvas.Width / image.getWidth();
canvas.YScale = canvas.Height / image.getHeight();
canvas.InvalidateVisual();
DrawSkipCount = 0;
}
}));
}
}
catch(Exception ex)
{
String message = String.IsNullOrEmpty(ex.Message) ? "AffdexMe error encountered." : ex.Message;
ShowExceptionAndShutDown(message);
}
}
private void DisplayFeaturePoints(Affdex.Frame affdexImage, Affdex.Face affdexFace)
{
try
{
// Plot Face Points
if ((mShowFacePoints) && (affdexFace != null))
{
var result = this.Dispatcher.BeginInvoke((Action)(() =>
{
if ((mCameraDetector != null) && (mCameraDetector.isRunning()))
{
// Clear the previous points
canvasFacePoints.Children.Clear();
canvasFacePoints.Width = imgAffdexFaceDisplay.ActualWidth;
canvasFacePoints.Height = imgAffdexFaceDisplay.ActualHeight;
mImageXScaleFactor = imgAffdexFaceDisplay.ActualWidth / affdexImage.getWidth();
mImageYScaleFactor = imgAffdexFaceDisplay.ActualHeight / affdexImage.getHeight();
SolidColorBrush pointBrush = new SolidColorBrush(Colors.Cornsilk);
var featurePoints = affdexFace.FeaturePoints;
foreach (var point in featurePoints)
{
Ellipse ellipse = new Ellipse()
{
Width = 4,
Height = 4,
Fill = pointBrush
};
canvasFacePoints.Children.Add(ellipse);
Canvas.SetLeft(ellipse, point.X * mImageXScaleFactor);
Canvas.SetTop(ellipse, point.Y * mImageYScaleFactor);
}
// Draw Face Bounding Rectangle
var xMax = featurePoints.Max(r => r.X);
var xMin = featurePoints.Min(r => r.X);
var yMax = featurePoints.Max(r => r.Y);
var yMin = featurePoints.Min(r => r.Y);
// Adjust the x/y min to accomodate all points
xMin -= 2;
yMin -= 2;
// Increase the width/height to accomodate the entire max pixel position
// EllipseWidth + N to make sure max points in the box
double width = (xMax - xMin + 6) * mImageXScaleFactor;
double height = (yMax - yMin + 6) * mImageYScaleFactor;
SolidColorBrush boundingBrush = new SolidColorBrush(Colors.Bisque);
Rectangle boundingBox = new Rectangle()
{
Width = width,
Height = height,
Stroke = boundingBrush,
StrokeThickness = 1,
};
canvasFacePoints.Children.Add(boundingBox);
Canvas.SetLeft(boundingBox, xMin * mImageXScaleFactor);
Canvas.SetTop(boundingBox, yMin * mImageYScaleFactor);
mFeaturePointsSkipCount = 0;
}
}));
}
}
catch(Exception ex)
{
String message = String.IsNullOrEmpty(ex.Message) ? "AffdexMe error encountered." : ex.Message;
ShowExceptionAndShutDown(message);
}
}