face_detect.cpp

//https://github.com/ri3tykity/Face-detection-using-opencv-in-visual-studiio-2010
#include<stdio.h>
#include<math.h>
#include<opencv/cv.h>
#include<opencv/highgui.h>
#include<opencv2/objdetect/objdetect.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<opencv2/imgproc/imgproc.hpp>
#include<vector>


using namespace cv;
using namespace std;

int main()
{
	CascadeClassifier face_cascade, eye_cascade;
	if(!face_cascade.load("/home/maisun/Downloads/opencv-2.4.9/data/haarcascades/haarcascade_frontalface_alt2.xml")) {
		printf("Error loading cascade file for face");
		return 1;
	}
	if(!eye_cascade.load("/home/maisun/Downloads/opencv-2.4.9/data/haarcascades/haarcascade_eye.xml")) {
		printf("Error loading cascade file for eye");
		return 1;
	}
	VideoCapture capture(0); //-1, 0, 1 device id
	if(!capture.isOpened())
	{
		printf("error to initialize camera");
		return 1;
	}
	Mat cap_img,gray_img;
	vector<Rect> faces, eyes;
	while(1)
	{
		capture >> cap_img;
		waitKey(10);
		cvtColor(cap_img, gray_img, CV_BGR2GRAY);
		cv::equalizeHist(gray_img,gray_img);
		face_cascade.detectMultiScale(gray_img, faces, 1.1, 10, CV_HAAR_SCALE_IMAGE | CV_HAAR_DO_CANNY_PRUNING, cvSize(0,0), cvSize(300,300));
		for(int i=0; i < faces.size();i++)
		{
			Point pt1(faces[i].x+faces[i].width, faces[i].y+faces[i].height);
			Point pt2(faces[i].x,faces[i].y);
			Mat faceROI = gray_img(faces[i]);
			eye_cascade.detectMultiScale(faceROI, eyes, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(30,30));
			for(size_t 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);
				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(cap_img, center, radius, Scalar(255,0,0), 2, 8, 0);
			}
			rectangle(cap_img, pt1, pt2, cvScalar(0,255,0), 2, 8, 0);
		}
		imshow("Result", cap_img);
		waitKey(3);
		char c = waitKey(3);
		if(c == 27)
			break;
	}
	return 0;
}