void Cam_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
try
{
/*
* if (framecounter >= 30)
* {
* if (videoCam != null && videoCam.IsRunning)
* {
* videoCam.SignalToStop();
* // videoSource.WaitForStop();
* //videoSource = null;
* }
* framecounter = 0;
* }
* framecounter++;
*/
Bitmap image = (Bitmap)eventArgs.Frame.Clone();
visionLocation.SetCurrentImage(image);
visionLocation.ApplyConvertToGrayscale();
//visionLocation.applySobelEdgeFilter();
visionLocation.ApplyCannyEdgeDetector();
outstr = visionLocation.LocateObjects();
// data.Dispatcher.Invoke(
// new UpdateTextCallback(this.UpdateTable),
// new object[] { outstr.Loc1X, outstr.Loc1Y, outstr.Loc2X, outstr.Loc2Y, outstr.Loc3X, outstr.Loc3Y, //outstr.Loc4X, outstr.Loc4Y, outstr.ItemWidth, outstr.ItemHeight, outstr.LocAngle, outstr.LocText, //outstr.OffsetX, outstr.OffsetY }
// );
img.Dispatcher.BeginInvoke(new ThreadStart(delegate
{
img.Source = MakeBS(visionLocation.GetCurrentImage());
}));
/*
* if (outstr != null && outstr.Loc1X > 0)
* {
* if (videoCam != null && videoCam.IsRunning)
* {
* videoCam.SignalToStop();
* // videoSource.WaitForStop();
* //videoSource = null;
* }
* framecounter = 0;
* }
*/
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
public VisionLocationResult LocateObjects()
{
VisionLocationResult ld = new VisionLocationResult(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "", 0, 0, null);
int totalwidth = 0;
int totalheight = 0;
System.Drawing.Point centerpoint = new System.Drawing.Point();
if (currentImage != null)
{
try
{
Bitmap image = new Bitmap(this.currentImage);
totalwidth = image.Width;
totalheight = image.Height;
centerpoint.X = image.Width / 2;
centerpoint.Y = image.Height / 2;
// lock image
BitmapData bmData = image.LockBits(
new Rectangle(0, 0, image.Width, image.Height),
ImageLockMode.ReadWrite, image.PixelFormat);
// turn background to black
ColorFiltering cFilter = new ColorFiltering(red: new IntRange(0, 64), green: new IntRange(0, 64), blue: new IntRange(0, 64));
//cFilter.Red = new IntRange(0, 64);
//cFilter.Green = new IntRange(0, 64);
//cFilter.Blue = new IntRange(0, 64);
cFilter.FillOutsideRange = false;
cFilter.ApplyInPlace(bmData);
// locate objects
BlobCounter bCounter = new BlobCounter();
bCounter.FilterBlobs = true;
bCounter.MinHeight = 10;
bCounter.MinWidth = 10;
bCounter.ProcessImage(bmData);
Blob[] baBlobs = bCounter.GetObjectsInformation();
image.UnlockBits(bmData);
// coloring objects
SimpleShapeChecker shapeChecker = new SimpleShapeChecker();
Graphics g = Graphics.FromImage(image);
Pen bluePen = new Pen(Color.Blue, 2);
Pen whitepen = new Pen(Color.White, 1);
for (int i = 0, n = baBlobs.Length; i < n; i++)
{
List <IntPoint> edgePoints = bCounter.GetBlobsEdgePoints(baBlobs[i]);
Rectangle[] _rects = bCounter.GetObjectsRectangles();
List <IntPoint> corners;
// is triangle or quadrilateral
if (shapeChecker.IsConvexPolygon(edgePoints, out corners))
{
PolygonSubType subType = shapeChecker.CheckPolygonSubType(corners);
Pen pen;
if (subType == PolygonSubType.Rectangle && corners.Count == 4)
{
pen = bluePen;
ld.Loc1X = corners[0].X;
ld.Loc1Y = corners[0].Y;
ld.Loc2X = corners[1].X;
ld.Loc2Y = corners[1].Y;
ld.Loc3X = corners[2].X;
ld.Loc3Y = corners[2].Y;
ld.Loc4X = corners[3].X;
ld.Loc4Y = corners[3].Y;
// find longest side of rectangle
double side1 = corners[0].DistanceTo(corners[1]);
double side2 = corners[1].DistanceTo(corners[2]);
double angleInRadians = 0;
double deltaY = 0;
double deltaX = 0;
int select1 = 0;
int select2 = 1;
if (side1 < side2)
{
select1 = 1;
select2 = 2;
ld.ItemWidth = side2;
ld.ItemHeight = side1;
}
else
{
ld.ItemWidth = side1;
ld.ItemHeight = side2;
}
// find angle of longest side
angleInRadians = Math.Atan2(corners[select1].Y, corners[select1].X) - Math.Atan2(corners[select2].Y, corners[select2].X);
deltaY = Math.Abs(corners[select2].Y - corners[select1].Y);
deltaX = Math.Abs(corners[select2].X - corners[select1].X);
double angleInDegrees = Math.Atan2(deltaY, deltaX) * 180 / Math.PI;
ld.LocAngle = angleInDegrees;
ld.OffsetY = PixelsToMM((GetCenter(corners).X - (totalwidth / 2)) * -1);
ld.OffsetX = PixelsToMM(GetCenter(corners).Y - (totalheight / 2));
ld.LocText = "side1: " + side1.ToString() + Environment.NewLine + "side2: " + side2.ToString() + Environment.NewLine + "Center X: " + GetCenter(corners).X + "Center Y: " + GetCenter(corners).Y
+ Environment.NewLine + "Image Center: " + (totalwidth / 2).ToString() + " x " + (totalheight / 2).ToString();
System.Drawing.Point[] _coordinates = ToPointsArray(corners);
// draw outline and corners
g.DrawPolygon(pen, _coordinates);
// draw center cross lines on image
g.DrawLine(whitepen, new System.Drawing.Point(0, totalheight / 2), new System.Drawing.Point(totalwidth, totalheight / 2));
g.DrawLine(whitepen, new System.Drawing.Point(totalwidth / 2, 0), new System.Drawing.Point(totalwidth / 2, totalheight));
ld.Image = image;
}
}
}
whitepen.Dispose();
bluePen.Dispose();
g.Dispose();
this.currentImage = image;
return(ld);
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
}
return(ld);
}
