OpenCV 人脸识别

通过OpenCV中的级联分类器

#include <opencv2/opencv.hpp>
#include <opencv2/core/ocl.hpp>

using namespace cv;
using namespace std;

void main()
{
    VideoCapture cap(0);
    if (!cap.isOpened())
    {
        cout << "错误" << endl;
        return;
    }
    Mat frame;

    CascadeClassifier facecascade, cascade_eye, cascade_mouth;
    facecascade.load("haarcascades/haarcascade_frontalface_alt.xml");while (cap.isOpened())
    {
        cap >> frame;

        std::vector<Rect> rect;
        facecascade.detectMultiScale(frame, rect, 1.45, 2, 0);
        cv::waitKey(1);
        
        if (rect.size() > 0)
        {
            for (int i = 0; i < rect.size(); i++)
            {
                int x = rect[i].x;
                int y = rect[i].y;
                int w = rect[i].width;
                int h = rect[i].height;
                Point point1, point2;
                point1.x = x;
                point1.y = y;
                point2.x = x + w;
                point2.y = y + h;

                cv::rectangle(frame, point1, point2, (255, 0, 0), 2, 0);
                
            }
        }
        cv::imshow("result", frame);
    }

}