public override void Draw(Canvas canvas)
{
if (this.mLFace == null)
{
return;
}
IList <MLPosition> face3dPoints = mLFace.Get3DKeyPoints(ML3DFace.LandmarkFive);
float[] projectionMatrix = new float[4 * 4];
float[] viewMatrix = new float[4 * 4];
mLFace.Get3DProjectionMatrix(projectionMatrix, 1, 10);
mLFace.Get3DViewMatrix(viewMatrix);
int frameHeight = (int)UnScaleX(overlay.Height); // Image height
int frameWidth = (int)UnScaleY(overlay.Width); // Image Width
float[] adaptMatrix = { frameWidth / 2, 0, frameWidth / 2, 0, -frameHeight / 2, frameHeight / 2, 0, 0, 1 };
IList <MLPosition> face2dPoints = TranslateTo2D(face3dPoints, projectionMatrix, viewMatrix, adaptMatrix);
StringBuilder sb = new StringBuilder();
// Draw 2D points
Paint numPaint;
numPaint = new Paint();
numPaint.Color = Color.Red;
numPaint.TextSize = frameHeight / 80;
for (int i = 0; i < face2dPoints.Count; i++)
{
MLPosition point = face2dPoints.ElementAt(i);
canvas.DrawPoint(TranslateX(point.GetX().FloatValue()), TranslateY(point.GetY().FloatValue()), boxPaint);
canvas.DrawText("" + i, TranslateX(point.GetX().FloatValue()), TranslateY(point.GetY().FloatValue()), numPaint);
sb.Append(point.GetX() + " " + point.GetY() + "\n");
}
}
private IList <MLPosition> TranslateTo2D(IList <MLPosition> face3dPoints, float[] projectionMatrix, float[] viewMatrix, float[] adaptMatrix)
{
IList <MLPosition> face2dPoints = new List <MLPosition>();
for (int i = 0; i < face3dPoints.Count; i++)
{
MLPosition curPoint = face3dPoints.ElementAt(i);
float[] curVec = { (float)curPoint.GetX(), (float)curPoint.GetY(), (float)curPoint.GetZ(), 1 };
//1 V*Vec
float[] temp1 = MatrixMulti(viewMatrix, 4, 4, curVec);
//2 P*(V*Vec)
float[] temp2 = MatrixMulti(projectionMatrix, 4, 4, temp1);
//3 calculations x’ y'
float[] temp3 = { temp2[0] / temp2[3], temp2[1] / temp2[3], 1 };
//4 calculations X Y coordinates
float[] point = MatrixMulti(adaptMatrix, 3, 3, temp3);
face2dPoints.Add(new MLPosition((Java.Lang.Float)point[0], (Java.Lang.Float)point[1]));
}
return(face2dPoints);
}
public override void Draw(Canvas canvas)
{
if (this.mFace == null)
{
return;
}
float start = 350f;
float x = start;
float width = 500f;
float y = this.overlay.Height - 300.0f;
Dictionary <string, float> emotions = new Dictionary <string, float>();
emotions.Add("Smiling", this.mFace.Emotions.SmilingProbability);
emotions.Add("Neutral", this.mFace.Emotions.NeutralProbability);
emotions.Add("Angry", this.mFace.Emotions.AngryProbability);
emotions.Add("Fear", this.mFace.Emotions.FearProbability);
emotions.Add("Sad", this.mFace.Emotions.SadProbability);
emotions.Add("Disgust", this.mFace.Emotions.DisgustProbability);
emotions.Add("Surprise", this.mFace.Emotions.SurpriseProbability);
//List<string> result = emotions.ToList<string>();
DecimalFormat decimalFormat = new DecimalFormat("0.000");
// Draw the facial feature value.
canvas.DrawText("Left eye: " + decimalFormat.Format(this.mFace.Features.LeftEyeOpenProbability), x, y,
this.probilityPaint);
x = x + width;
canvas.DrawText("Right eye: " + decimalFormat.Format(this.mFace.Features.RightEyeOpenProbability), x, y,
this.probilityPaint);
y = y - 40.0f;
x = start;
canvas.DrawText("Moustache Probability: " + decimalFormat.Format(this.mFace.Features.MoustacheProbability),
x, y, this.probilityPaint);
x = x + width;
canvas.DrawText("Glass Probability: " + decimalFormat.Format(this.mFace.Features.SunGlassProbability), x,
y, this.probilityPaint);
y = y - 40.0f;
x = start;
canvas.DrawText("Hat Probability: " + decimalFormat.Format(this.mFace.Features.HatProbability), x, y,
this.probilityPaint);
x = x + width;
canvas.DrawText("Age: " + this.mFace.Features.Age, x, y, this.probilityPaint);
y = y - 40.0f;
x = start;
String sex = (this.mFace.Features.SexProbability > 0.5f) ? "Female" : "Male";
canvas.DrawText("Gender: " + sex, x, y, this.probilityPaint);
x = x + width;
canvas.DrawText("RotationAngleY: " + decimalFormat.Format(this.mFace.RotationAngleY), x, y, this.probilityPaint);
y = y - 40.0f;
x = start;
canvas.DrawText("RotationAngleZ: " + decimalFormat.Format(this.mFace.RotationAngleZ), x, y, this.probilityPaint);
x = x + width;
canvas.DrawText("RotationAngleX: " + decimalFormat.Format(this.mFace.RotationAngleX), x, y, this.probilityPaint);
y = y - 40.0f;
x = start;
var sortedDict = from entry in emotions orderby entry.Value descending select entry;
canvas.DrawText(sortedDict.ElementAt(0).Key, x, y, this.probilityPaint);
// Draw a face contour.
if (this.mFace.FaceShapeList != null)
{
foreach (MLFaceShape faceShape in this.mFace.FaceShapeList)
{
if (faceShape == null)
{
continue;
}
IList <MLPosition> points = faceShape.Points;
for (int i = 0; i < points.Count; i++)
{
MLPosition point = points.ElementAt(i);
canvas.DrawPoint(this.TranslateX(point.GetX().FloatValue()), this.TranslateY(point.GetY().FloatValue()),
this.boxPaint);
if (i != (points.Count - 1))
{
MLPosition next = points.ElementAt(i + 1);;
if (point != null && point.GetX() != null && point.GetY() != null)
{
if (i % 3 == 0)
{
canvas.DrawText(i + 1 + "", this.TranslateX(point.GetX().FloatValue()),
this.TranslateY(point.GetY().FloatValue()), this.textPaint);
}
canvas.DrawLines(new float[] { this.TranslateX(point.GetX().FloatValue()),
this.TranslateY(point.GetY().FloatValue()), this.TranslateX(next.GetX().FloatValue()),
this.TranslateY(next.GetY().FloatValue()) }, this.GetPaint(faceShape));
}
}
}
}
}
// Face Key Points
foreach (MLFaceKeyPoint keyPoint in this.mFace.FaceKeyPoints)
{
if (keyPoint != null)
{
MLPosition point = keyPoint.Point;
canvas.DrawCircle(this.TranslateX((float)point.GetX()), this.TranslateY((float)point.GetY()), 10f, this.landmarkPaint);
}
}
}
