public DiffContainer GetDiffs(Bitmap newFrame, int compressRate)
{
//sw.Restart();
Image <Bgr, Byte> Frame = new Image <Bgr, byte>(newFrame);
if (_oldImage == null || _oldImage.Height != newFrame.Height)
{
_oldImage = new Bitmap(newFrame.Width, newFrame.Height);
}
Previous_Frame = new Image <Bgr, byte>(_oldImage);
Image <Bgr, Byte> Difference;
Difference = Previous_Frame.AbsDiff(Frame);
Image <Gray, Byte> gray = Difference.Convert <Gray, Byte>().PyrDown().PyrUp();
DiffContainer container = new DiffContainer();
List <MovedObject> movedObjects = new List <MovedObject>();
using (MemStorage storage = new MemStorage())
for (Contour <System.Drawing.Point> contours = gray.FindContours(CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_SIMPLE, RETR_TYPE.CV_RETR_EXTERNAL, storage);
contours != null; contours = contours.HNext)
{
Contour <Point> contour = contours.ApproxPoly(contours.Perimeter * 0.001);
if (contour.Area > 100)
// if (contour.Total > 5)
{
Rectangle rect = contour.BoundingRectangle;
rect.X -= 1;
rect.Y -= 1;
rect.Width += 2;
rect.Height += 2;
var part = Frame.GetSubRect(rect);
//var j = ImageResizer.ImageBuilder.Current.Build(part.ToBitmap(),
// new ImageResizer.ResizeSettings(
// "maxwidth=" + part.Width / CompressRate +
// "&maxheight=" + part.Height +
// "&format=jpg&quality=20"
// ));
var j = part.ToBitmap();
container.Data.Add(rect, j);
}
}
UpdateOldFrame(container);
//sw.Stop();
//container.Elapsed = sw.ElapsedMilliseconds;
return(container);
}
