//private FaceEyes Detect(byte [] imageBytes)
private FaceEyes Detect()
{
FaceEyes FE = new FaceEyes();
Mat image = new Mat(Assets, "lena.jpg");
using (CascadeClassifier face = new CascadeClassifier(faceXml))
using (CascadeClassifier eye = new CascadeClassifier(eyeXml))
{
//watch = Stopwatch.StartNew();
using (UMat ugray = new UMat())
{
CvInvoke.CvtColor(image, ugray, Emgu.CV.CvEnum.ColorConversion.Bgr2Gray);
//normalizes brightness and increases contrast of the image
CvInvoke.EqualizeHist(ugray, ugray);
//Detect the faces from the gray scale image and store the locations as rectangle
//The first dimensional is the channel
//The second dimension is the index of the rectangle in the specific channel
Rectangle[] facesDetected = face.DetectMultiScale(
ugray,
1.1,
10,
new System.Drawing.Size(20, 20));
FE.Faces.AddRange(facesDetected);
foreach (Rectangle f in facesDetected)
{
//Get the region of interest on the faces
using (UMat faceRegion = new UMat(ugray, f))
{
Rectangle[] eyesDetected = eye.DetectMultiScale(
faceRegion,
1.1,
10,
new System.Drawing.Size(20, 20));
foreach (Rectangle e in eyesDetected)
{
Rectangle eyeRect = e;
eyeRect.Offset(f.X, f.Y);
FE.Eyes.Add(eyeRect);
}
}
}
}
//watch.Stop();
}
return(FE);
}
//private FaceEyes Detect(byte [] imageBytes)
private FaceEyes Detect(Mat image2)
//private FaceEyes Detect(Mat ugray)
{
FaceEyes FE = new FaceEyes();
if (/*face != null &&*/ eye != null)
{
//watch = Stopwatch.StartNew();
Log.Error(TAG, "\t\t -- FaceEyes Detect()");
//using (UMat ugray = new UMat())
//{
Mat ugray = new Mat();
CvInvoke.CvtColor(image2, ugray, Emgu.CV.CvEnum.ColorConversion.Rgb2Gray);
//normalizes brightness and increases contrast of the image
CvInvoke.EqualizeHist(ugray, ugray);
//Rectangle[] facesDetected = face.DetectMultiScale(
// ugray, 1.1, 10, new System.Drawing.Size(10,10));
//FE.Faces.AddRange(facesDetected);
//foreach (Rectangle f in facesDetected)
//{
//Log.Error(TAG, "\t\t -- FaceEyes Detect()\t FACE DETECTED");
//Mat faceRegion = new Mat(ugray, f);
//Get the region of interest on the faces
//using (UMat faceRegion = new UMat(ugray, f))
//{
Rectangle[] eyesDetected = eye.DetectMultiScale(
ugray, 1.1, 20, new System.Drawing.Size(20, 20));
//faceRegion, 1.1, 10, new System.Drawing.Size(20, 20));
foreach (Rectangle e in eyesDetected)
{
Log.Error(TAG, "\t\t -- FaceEyes Detect()\t EYE DETECTED");
Rectangle eyeRect = e;
//eyeRect.Offset(e.X,e.Y); //offset from top(x)-left(y)
FE.Eyes.Add(eyeRect);
}
//}
//}
//}
//watch.Stop();
}
return(FE);
}
private void DrawFocusRect(ISurfaceHolder holder, float RectLeft, float RectTop, float RectRight, float RectBottom, Android.Graphics.Color color)
{
//lock
var canvas = holder.LockCanvas();
//no pointer to canvas?
if (canvas == null)
{
return;
}
//detect face
FaceEyes FE = Detect();
//clear out
canvas.DrawColor(Android.Graphics.Color.Transparent, Android.Graphics.PorterDuff.Mode.Clear);
//border's properties
var paint = new Android.Graphics.Paint();
paint.SetStyle(Android.Graphics.Paint.Style.Stroke);
paint.Color = color;
paint.StrokeWidth = 3;
Rectangle e0 = FE.Eyes[0];
Rectangle e1 = FE.Eyes[1];
Rectangle f0 = FE.Faces[0];
canvas.DrawRect(new Rect(e0.Left, e0.Top, e0.Right, e0.Bottom), paint);
canvas.DrawRect(new Rect(e1.Left, e1.Top, e1.Right, e1.Bottom), paint);
paint.Color = Android.Graphics.Color.White;
canvas.DrawRect(new Rect(f0.Left, f0.Top, f0.Right, f0.Bottom), paint);
//unlock
holder.UnlockCanvasAndPost(canvas);
}
public void PreviewFrame(Mat fnMat)
//public void PreviewFrame(Image yuvImg)
{
/* EMIL EXAMPLE
* //just move the box around to see something happen
* lock (_lock)
* {
* if (!isBusy)
* {
* isBusy = true;
* var results = Detect(image);
*
*
* var PreviewThread = Task.Factory.StartNew(() =>
* {
* screenX -= 5;
* screenY -= 5;
*
* if (screenX < 150 || screenY < 150)
* {
* var manager = GetSystemService(Context.WindowService).JavaCast<IWindowManager>();
* var size = new Android.Graphics.Point();
* manager.DefaultDisplay.GetSize(size);
*
* screenX = size.X - 150;
* screenY = size.Y - 150;
* }
*
* L = screenX - 100;
* T = screenY - 100;
* R = screenX + 100;
* B = screenY + 100;
*
* RunOnUiThread(() =>
* {
* //code to update UI
* DrawFocusRect(mTransparentView.Holder, L, T, R, B, Android.Graphics.Color.Yellow);
* });
* });
*
* //free lock
* lock (_lock)
* {
* isBusy = false;
* }
* }
* }*/
Log.Error(TAG, "\t\t--in PreviewFrame--");
CLEAR_CANVAS = false;
lock (_lock)
{
if (!isBusy)
{
isBusy = true;
PreviewThread = Task.Factory.StartNew(() =>
{
try
{
//face = new CascadeClassifier(faceXml);
eye = new CascadeClassifier(eyeXml);
Log.Error(TAG, "\t\t--PreviewThread: " + this);
//Mat image = Yuv2Rgb(yuvImg);
//Mat rgbMat = new Mat();
//CvInvoke.CvtColor(yuvMat, rgbMat, Emgu.CV.CvEnum.ColorConversion.Yuv420P2Rgb);
RESULTS = Detect(fnMat);
CLEAR_CANVAS = true;
RunOnUiThread(() =>
{
if (RESULTS != null && RESULTS.Count > 0)
{
/*COLOR = Android.Graphics.Color.White;
* foreach (var face in RESULTS.Faces)
* {
* L = face.Left; T = face.Top;
* R = face.Right; B = face.Bottom;
*
* DrawFocusRect(mTransparentView.Holder, L, T, R, B, COLOR);
* }*/
foreach (var eye in RESULTS.Eyes)
{
L = eye.Left; T = eye.Top;
R = eye.Right; B = eye.Bottom;
COLOR = Android.Graphics.Color.Green;
DrawFocusRect(mTransparentView.Holder, eye.Left, eye.Top, eye.Right, eye.Bottom, COLOR);
}
}
else
{
COLOR = Android.Graphics.Color.Red;
DrawFocusRect(mTransparentView.Holder, L, T, R, B, COLOR);
}
});
}
catch (System.Exception ex) { }
//free lock
lock (_lock)
{
isBusy = false;
}
});
}
}
//*/
}
