protected override void ProcessFilter(BitmapData imageData)
{
if (mask == null)
{
mask = new Bitmap(context.Background.Width, context.Background.Height, context.Background.PixelFormat);
}
unsafe
{
int width = imageData.Width;
int height = imageData.Height;
PixelFormat pixelFormat = imageData.PixelFormat;
BitmapData imageBits = imageData;
BitmapData backBits = context.Background.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadOnly, pixelFormat);
BitmapData maskBits = mask.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, pixelFormat);
int stride = imageBits.Stride;
byte *imagePtr = (byte *)imageBits.Scan0;
byte *backPtr = (byte *)backBits.Scan0;
byte *maskPtr = (byte *)maskBits.Scan0;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int offset = y * stride + x;
byte imagePixel = imagePtr[offset];
byte backPixel = backPtr[offset];
byte maskPixel = 255;
if (imagePixel - backPixel > Threshold)
{
maskPixel = 0;
}
maskPtr[offset] = maskPixel;
}
}
context.Background.UnlockBits(backBits);
mask.UnlockBits(maskBits);
}
subtract.OverlayImage = mask;
subtract.ApplyInPlace(imageData);
}
void cam_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
Bitmap realimage = (Bitmap)eventArgs.Frame.Clone();
Bitmap rimage = (Bitmap)eventArgs.Frame.Clone();
Bitmap bimage = (Bitmap)eventArgs.Frame.Clone();
//Red Object detection
GrayscaleBT709 grayscale = new GrayscaleBT709();
Subtract sfilter = new Subtract(grayscale.Apply(rimage));
ExtractChannel rchannel = new ExtractChannel(RGB.R);
ExtractChannel bchannel = new ExtractChannel(RGB.B);
rimage = rchannel.Apply(rimage);
bimage = bchannel.Apply(bimage);
sfilter.ApplyInPlace(rimage);
sfilter.ApplyInPlace(bimage);
Median mfilter = new Median(5);
mfilter.ApplyInPlace(rimage);
mfilter.ApplyInPlace(bimage);
Threshold thresh = new Threshold(50);
thresh.ApplyInPlace(rimage);
thresh.ApplyInPlace(bimage);
BlobCounter rblob = new BlobCounter();
rblob.ObjectsOrder = ObjectsOrder.Area;
rblob.ProcessImage(rimage);
BlobCounter bblob = new BlobCounter();
bblob.ObjectsOrder = ObjectsOrder.Area;
bblob.ProcessImage(bimage);
Rectangle[] rrect = rblob.GetObjectsRectangles();
Rectangle[] brect = bblob.GetObjectsRectangles();
p = new int[rrect.Length + brect.Length];
arr = 0;
if (rrect.Length > 0)
{
for (int i = 0; i < rrect.Length; i++)
{
if (rrect[i].Height > 20 && rrect[i].Width > 20)//Object Min height width
{
Graphics g = Graphics.FromImage(realimage);
g.DrawRectangle(new Pen(Color.Red), rrect[i]);
objheight = rrect[i].Height;
objwidth = rrect[i].Width;
objx = rrect[i].X + (objwidth / 2);
objy = rrect[i].Y + (objheight / 2);
p[i] = getpartition();
arr++;
g.DrawEllipse(new Pen(Color.Yellow), objx, objy, 5, 5);
g.DrawString("Red Object", new Font("Arial", 10), new SolidBrush(Color.AntiqueWhite), objx, objy - 15);
g.DrawString("X:" + objx + " Y:" + objy, new Font("Arial", 10), new SolidBrush(Color.LimeGreen), objx, objy);
g.DrawString("H:" + objheight + " W:" + objwidth, new Font("Arial", 10), new SolidBrush(Color.LightCyan), objx, objy + 15);
g.DrawString("P:" + p[i], new Font("Arial", 10), new SolidBrush(Color.LightSkyBlue), objx, objy + 25);
}
}
obj = largest();
if (obj == 0)
{
obj = prevobj;
}
prevobj = obj;
}
if (brect.Length > 0)
{
for (int i = 0; i < brect.Length; i++)
{
if (brect[i].Height > 20 && brect[i].Width > 20)//Object Min height width
{
Graphics g = Graphics.FromImage(realimage);
g.DrawRectangle(new Pen(Color.Red), brect[i]);
objheight = brect[i].Height;
objwidth = brect[i].Width;
objx = brect[i].X + (objwidth / 2);
objy = brect[i].Y + (objheight / 2);
p[i + arr] = getpartition();
g.DrawEllipse(new Pen(Color.Yellow), objx, objy, 5, 5);
g.DrawString("Blue Object", new Font("Arial", 10), new SolidBrush(Color.AntiqueWhite), objx, objy - 15);
g.DrawString("X:" + objx + " Y:" + objy, new Font("Arial", 10), new SolidBrush(Color.LimeGreen), objx, objy);
g.DrawString("H:" + objheight + " W:" + objwidth, new Font("Arial", 10), new SolidBrush(Color.LightCyan), objx, objy + 15);
g.DrawString("P:" + p[i + arr], new Font("Arial", 10), new SolidBrush(Color.LightSkyBlue), objx, objy + 25);
}
}
obj = largest();
if (obj == 0)
{
obj = prevobj;
}
prevobj = obj;
}
displayBox.Image = realimage;
}