public static RollSystemMobile.Models.RecognizerResult RecognizeStudentForAttendance(int RollCallID, String ImagePath)
{
//Dua ID cua roll call, cac hinh da up, cho ra danh sach ket qua
FaceRecognizer FaceRec = CreateRollCallRecognizer(RollCallID);
RollSystemMobile.Models.RecognizerResult Result = RecognizeFromImage(FaceRec, ImagePath);
//Dung xong nho dispose cho nhe bo nho
FaceRec.Dispose();
return(Result);
}
private static RollSystemMobile.Models.RecognizerResult RecognizeFromImage(FaceRecognizer FaceRec, String ImagePath)
{
RollSystemMobile.Models.RecognizerResult Result = new RollSystemMobile.Models.RecognizerResult();
//Lay moi ten anh, ko lay toan bo duong dan
Result.ImageLink = System.IO.Path.GetFileName(ImagePath);
//Dua anh vao, dua ket qua ra
if (Haar == null)
{
Haar = new HaarCascade(HAAR_XML_PATH);
}
//Chuyen anh trang den roi bat dau recognize
Image <Bgr, byte> RawImage = new Image <Bgr, byte>(ImagePath);
Image <Gray, byte> Image = RawImage.Clone().Convert <Gray, byte>();
var FacesDetected = Image.DetectHaarCascade(Haar, DETECT_SCALE, MIN_NEIGHBOR,
0, new System.Drawing.Size(MIN_SIZE, MIN_SIZE))[0];
foreach (var Face in FacesDetected)
{
RollSystemMobile.Models.FaceRegion FaceReg = new RollSystemMobile.Models.FaceRegion(Face.rect.X, Face.rect.Y,
Face.rect.Width, Face.rect.Height);
//Nhan dien face la cua ai.
Image <Gray, byte> FaceImage = Image.Copy(Face.rect).Resize(TRAINING_DATA_SIZE,
TRAINING_DATA_SIZE, INTER.CV_INTER_CUBIC);
FaceImage._EqualizeHist();
FaceRecognizer.PredictionResult PR = FaceRec.Predict(FaceImage);
FaceReg.StudentID = PR.Label;
FaceReg.StudentName = GetUserName(PR);
Result.FaceList.Add(FaceReg);
}
return(Result);
}
