public User RecognizeFace(Image<Gray, byte> face)
{
using (var context = new FaceRecognitionContext())
{
var faces = new List<Image<Gray, byte>>();
var ids = new List<string>();
foreach (var user in context.Users)
{
var reconogizedFace = new Image<Gray, byte>(user.Face.GetBitmap());
var id = user.Id.ToString(CultureInfo.InvariantCulture);
faces.Add(reconogizedFace);
ids.Add(id);
}
if (ids.Any())
{
var termCrit = new MCvTermCriteria(ids.Count(), 0.001);
var recognizedFaces = new EigenObjectRecognizer(faces.ToArray(), ids.ToArray(), 2500, ref termCrit);
var label = recognizedFaces.Recognize(face);
if (!String.IsNullOrEmpty(label))
{
var id = int.Parse(label);
return context.Users.SingleOrDefault(x => x.Id == id);
}
}
return null;
}
}
public void SaveNewDetectedFace(string name, Image<Gray, byte> detectedFace)
{
using (var context = new FaceRecognitionContext())
{
byte[] pixelData;
using(var ms = new MemoryStream())
{
detectedFace.Bitmap.Save(ms, ImageFormat.Bmp);
pixelData = ms.ToArray();
}
var recognizedFace = new RecognizedFace
{
Height = detectedFace.Height,
Width = detectedFace.Width,
PixelData = pixelData
};
var user = new User
{
Face = recognizedFace,
NickName = name
};
context.Users.Add(user);
context.SaveChanges();
}
}