#include <iostream>
#include <opencv2/core/core.hpp> 
#include <opencv2/highgui/highgui.hpp>
#include <opencv/highgui.h>
#include <opencv/cv.h>
using namespace cv ;
using namespace std ;

void detectAndDisplay( Mat frame );
/** Global variables */
 String face_cascade_name = "/Users/powenko/Desktop/靜宜大學/20161001-課程-無人機安全監控/OpenCV/opencv/XCode/07Face/sample21_haarcascades_Camera/test/opencv-master/data/haarcascades/haarcascade_frontalface_alt.xml";
 String eyes_cascade_name = "/Users/powenko/Desktop/靜宜大學/20161001-課程-無人機安全監控/OpenCV/opencv/XCode/07Face/sample21_haarcascades_Camera/test/opencv-master/data/haarcascades/haarcascade_eye_tree_eyeglasses.xml";
CascadeClassifier face_cascade;
CascadeClassifier eyes_cascade;
string window_name = "Capture - Face detection";
RNG rng(12345);
//下載　httpsss://github.com/opencv/opencv/tree/master/data/haarcascades


int main() {
   
    if (!face_cascade.load(face_cascade_name))
    {
        printf("--(!)Error loading\n");
        return -1;
    }
    if (!eyes_cascade.load(eyes_cascade_name))
    {
        printf("--(!)Error loading\n");
        return -1;
    }
    VideoCapture cap(0);             //開啟攝影機
    if(!cap.isOpened()) return -1;   //確認攝影機打開
    Mat frame;                       //用矩陣紀錄抓取的每張frame
    for(;;){
        if (cap.isOpened())
        {
            //frame=cvQueryFrame(cam);
            cap>>frame;   //把取得的影像放置到矩陣中
            if( !frame.empty() )
            { detectAndDisplay( frame ); }
            else
            { printf(" --(!) No captured frame -- Break!"); break; }
            
            if(waitKey(30) >= 0) break;  //按鍵就離開程式

        }
    }
    system("PAUSE");
    return 0;
}

void detectAndDisplay( Mat frame )
{
    vector<Rect>faces;
    Mat frame_gray;
    cvtColor(frame,frame_gray,CV_BGR2GRAY);
    equalizeHist(frame_gray,frame_gray);
    face_cascade.detectMultiScale(frame_gray,faces,1.1,2,0, Size(30, 30) );
    for (int i=0;i<faces.size();i++)
    {
        Point center(faces[i].x+faces[i].width*0.5,faces[i].y+faces[i].height*0.5);
        ellipse(frame,center,Size( faces[i].width*0.5, faces[i].height*0.5), 0, 0, 360, Scalar( 255, 0, 255 ), 4, 8, 0);
        Mat faceROI = frame_gray( faces[i] );
        std::vector<Rect> eyes;
        //-- In each face, detect eyes
        eyes_cascade.detectMultiScale( faceROI, eyes, 1.1, 2, 0 , Size(30, 30) );
        for( int j = 0; j < eyes.size(); j++ )
        {
            Point center( faces[i].x + eyes[j].x + eyes[j].width*0.5, faces[i].y + eyes[j].y + eyes[j].height*0.5 );
            int radius = cvRound( (eyes[j].width + eyes[j].height)*0.25 );
            circle( frame, center, radius, Scalar( 255, 0, 0 ), 4, 8, 0 );
        }
    }
    imshow(window_name, frame);                //建立一個視窗,顯示frame到camera名稱的視窗
    
}