#include <iostream>
#include "opencv2/opencv.hpp"

using namespace std;
using namespace cv;

void detect_face() {
	Mat src = imread("../../resources/images/kids.png");

	CascadeClassifier classifier("../../resources/haarcascade_frontalface_default.xml");

	vector<Rect> faces;
	classifier.detectMultiScale(src, faces);

	for (auto rc : faces)
		rectangle(src, rc, Scalar(255, 0, 255), 2);

	imshow("src", src);

	waitKey();
	destroyAllWindows();
}

void detect_eyes() {
	Mat src = imread("../../resources/images/kids.png");

	CascadeClassifier face_classifier("../../resources/haarcascade_frontalface_default.xml");
	CascadeClassifier eye_classifier("../../resources/haarcascade_eye.xml");

	vector<Rect> faces;
	face_classifier.detectMultiScale(src, faces);

	for (auto face : faces) {
		rectangle(src, face, Scalar(255, 0, 255), 2);

		Mat faceROI = src(face);

		vector<Rect> eyes;
		eye_classifier.detectMultiScale(faceROI, eyes);

		for (Rect eye : eyes) {
			Point center(eye.x + eye.width / 2, eye.y + eye.height / 2);
			circle(faceROI, center, eye.width /2, Scalar(255, 0, 0), 2, LINE_AA);
		}
	}

	imshow("src", src);

	waitKey();
	destroyAllWindows();
}

int main() {
	detect_eyes();
}