main.cpp

#include <opencv2\highgui\highgui.hpp>
#include <opencv2\imgproc\imgproc.hpp>

#include "VideoFaceDetector.h"

const cv::String    WINDOW_NAME("Camera video");
const cv::String    CASCADE_FILE("haarcascade_frontalface_default.xml");

int main(int argc, char** argv)
{
    // Try opening camera
    cv::VideoCapture camera(0);
    //cv::VideoCapture camera("D:\\video.mp4");
    if (!camera.isOpened()) {
        fprintf(stderr, "Error getting camera...\n");
        exit(1);
    }

    cv::namedWindow(WINDOW_NAME, cv::WINDOW_KEEPRATIO | cv::WINDOW_AUTOSIZE);

    VideoFaceDetector detector(CASCADE_FILE, camera);
    cv::Mat frame;
    double fps = 0, time_per_frame;
    while (true)
    {
        auto start = cv::getCPUTickCount();
        detector >> frame;
        auto end = cv::getCPUTickCount();

        time_per_frame = (end - start) / cv::getTickFrequency();
        fps = (15 * fps + (1 / time_per_frame)) / 16;

        printf("Time per frame: %3.3f\tFPS: %3.3f\n", time_per_frame, fps);

        cv::rectangle(frame, detector.face(), cv::Scalar(255, 0, 0));
        cv::circle(frame, detector.facePosition(), 30, cv::Scalar(0, 255, 0));

        cv::imshow(WINDOW_NAME, frame);
        if (cv::waitKey(25) == 27) break;
    }

    return 0;
}