Тема: Поиск лица на фото (пакет Emgu.CV)

        public List<string> FindFace(Dictionary<Image<Gray, byte>, string> faces, Image<Gray, byte> face_to_find, double dist = 0)
        {
            if (dist == 0)
                dist = recognition_accuracy;

            List<string> ret = new List<string>();



            EigenFaceRecognizer recognizer = new EigenFaceRecognizer(0, dist);

            Mat[] imgs = new Mat[faces.Count];
            int[] labels = new int[faces.Count];

            for(int i = 0; i < faces.Count; i++)
            {
                imgs[i] = faces.ElementAt(i).Key.Mat;
                labels[i] = i;
            }


           recognizer.Train(imgs, labels);

           FaceRecognizer.PredictionResult res = recognizer.Predict(face_to_find);


            if (res.Distance <= dist && res.Label >= labels[0] && res.Label < labels[faces.Count])
                ret.Add(faces.ElementAt(res.Label).Value);



            return ret;
        }