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 ImageLabel Get(int id)
{
using (var context = new FaceRecognitionContext())
{
return(context.ImageLabels.FirstOrDefault(e => e.ImageLabelId == id));
}
}
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();
}
}
public void Add(ImageLabel image)
{
using (var context = new FaceRecognitionContext())
{
context.ImageLabels.Add(image);
context.SaveChanges();
}
}
public void Add(IEnumerable <ImageLabel> images)
{
using (var context = new FaceRecognitionContext())
{
context.ImageLabels.AddRange(images);
context.SaveChanges();
}
}
public IEnumerable <ImageLabel> GetImages()
{
using (var context = new FaceRecognitionContext())
{
var imageLabels = context.ImageLabels.AsNoTracking();
return(imageLabels.ToList());
}
}
public void SetLabel(int imageLabelId, string label)
{
using (var context = new FaceRecognitionContext())
{
var imageLabelToSetLabel = context.ImageLabels.FirstOrDefault(e => e.ImageLabelId == imageLabelId);
if (imageLabelToSetLabel != null)
{
imageLabelToSetLabel.Label = label;
context.SaveChanges();
}
}
}
public void Delete(int id)
{
using (var context = new FaceRecognitionContext())
{
var imageLabelToDelete = context.ImageLabels.FirstOrDefault(e => e.ImageLabelId == id);
if (imageLabelToDelete != null)
{
context.ImageLabels.Remove(imageLabelToDelete);
context.SaveChanges();
}
}
}
public Dictionary <string, int> GetLabelMap()
{
var labelsDict = new Dictionary <string, int>();
using (var context = new FaceRecognitionContext())
{
labelsDict = context.ImageLabels.AsNoTracking()
.ToDictionary(a => a.Label, b => b.ImageLabelId);
}
labelsDict["unknown"] = 0;
return(labelsDict);
}
static void Main(string[] args)
{
using (var db = new FaceRecognitionContext())
{
var query = from u in db.Students
orderby u.StudentId
select u;
foreach (var item in query)
{
Console.WriteLine(item.StudentId + ": " + item.FullName);
}
Console.WriteLine("Press any key to exit...");
Console.ReadKey();
}
}
public SlotManagement()
{
_context = new FaceRecognitionContext();
}
public AttendanceManagement()
{
_context = new FaceRecognitionContext();
}
