using System;
using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;
using Emgu.CV.Util;

namespace FaceRecognitionExample
{
    class Program
    {
        static void Main(string[] args)
        {
            // 加載Haar特征分類(lèi)器
            string faceCascadePath = "haarcascade_frontalface_default.xml";
            CascadeClassifier faceCascade = new CascadeClassifier(faceCascadePath);

            // 讀取圖像
            Mat image = CvInvoke.Imread("path_to_your_image.jpg", ImreadModes.Color);

            // 轉(zhuǎn)換為灰度圖像
            Mat grayImage = new Mat();
            CvInvoke.CvtColor(image, grayImage, ColorConversion.Bgr2Gray);

            // 檢測(cè)人臉
            using (VectorOfRect faceRects = new VectorOfRect())
            {
                faceCascade.DetectMultiScale(
                    grayImage,
                    faceRects,
                    1.1,
                    10,
                    HaarDetectionType.ScaleImage,
                    new Size(30, 30),
                    new Size(grayImage.Width, grayImage.Height)
                );

                foreach (Rect rect in faceRects)
                {
                    // 在人臉周?chē)?huà)矩形框
                    CvInvoke.Rectangle(image, rect, new MCvScalar(0, 255, 0), 2);
                }
            }

            // 顯示結(jié)果
            CvInvoke.Imshow("Face Detection", image);
            CvInvoke.WaitKey(0);
            CvInvoke.DestroyAllWindows();
        }
    }
}