public override IObservable <Rect[]> Process(IObservable <IplImage> source)
{
return(Observable.Defer(() =>
{
var storage = new MemStorage();
var cascade = HaarClassifierCascade.Load(FileName);
return source.Select(input =>
{
var offset = Offset;
var objects = cascade.DetectObjects(input, storage, ScaleFactor, MinNeighbors, Flags, MinSize, MaxSize);
var result = new Rect[objects.Count];
objects.CopyTo(result);
storage.Clear();
for (int i = 0; i < result.Length; i++)
{
result[i].X += offset.X;
result[i].Y += offset.Y;
}
return result;
}).Finally(() =>
{
cascade.Dispose();
storage.Dispose();
});
}));
}
public static void DetectFace(Capture capture)
{
var path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "data", "haarcascades_cuda", "haarcascade_frontalface_alt.xml");
var cascade = HaarClassifierCascade.Load(path);
var storage = new MemStorage();
var size = new Size(40, 40);
using (var window = new NamedWindow("test"))
{
while (CV.WaitKey(1) < 0)
{
using (var image = capture.QueryFrame())
{
if (image == null)
{
break;
}
var faces = cascade.DetectObjects(image, storage, 1.1, 3, 0, size);
foreach (var rect in faces.ToArray <Rect>())
{
CV.Rectangle(image, new Point(rect.X, rect.Y), new Point(rect.X + rect.Width, rect.Y + rect.Height), new Scalar(255, 0, 0), 1, LineFlags.Connected8, 0);
window.ShowImage(image);
}
}
}
}
}
internal static extern Seq cvHaarDetectObjects(
Arr image,
HaarClassifierCascade cascade,
MemStorage storage,
double scale_factor,
int min_neighbors,
HaarDetectObjectFlags flags,
Size min_size,
Size max_size);
private void InitClassifiers(ClassifierType classifierType, System.IO.DirectoryInfo classifierDir)
{
string faceClassifierFileName = GetFileNameFromClassifierType(classifierType);
string eyesClassifierFileName = GetFileNameFromClassifierType(ClassifierType.Eyes);
managedHaarFace = HaarClassifierCascade.Parse(XDocument.Load(faceClassifierFileName));
managedHaarEyes = HaarClassifierCascade.Parse(XDocument.Load(eyesClassifierFileName));
unmanagedHaarFace = new HaarCascade(faceClassifierFileName);
unmanagedHaarEyes = new HaarCascade(eyesClassifierFileName);
}
