void FaceDetectandDisplayAll(const string& window_name, Mat frame, int minFaceSize, int minEyeSize, vector<Rect>face)
{
	vector<Rect> faces;
	Mat frame_gray;
	cvtColor(frame, frame_gray, CV_BGR2GRAY);
	equalizeHist(frame_gray, frame_gray);
	//-- Detect faces
	face_cascade.detectMultiScale(frame_gray, faces, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE,
		Size(minFaceSize, minFaceSize));
	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);
		Point upLeft(faces[i].x, faces[i].y);
		Point downRight(faces[i].x + faces[i].height, faces[i].y + faces[i].width);

		rectangle(frame, upLeft, downRight, Scalar(255, 0, 255), 2, 8, 0);
		Mat faceROI = frame_gray(faces[i]);

		std::vector<Rect> eyes;
		Rect eyes_rect;
		eyes_rect.x = faces[i].x;
		eyes_rect.y = faces[i].y + 0.2*faces[i].height;
		eyes_rect.width = faces[i].width;
		eyes_rect.height = 0.4*faces[i].height;
		Mat eyes_ROI = frame_gray(eyes_rect);
		eyes_cascade.detectMultiScale(eyes_ROI, eyes, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(minEyeSize, minEyeSize));


		for (int j = 0; j < eyes.size(); j++)
		{
			eyes[j].x = eyes[j].x + faces[i].x;
			eyes[j].y = eyes[j].y + faces[i].y + 0.2*faces[i].height;
			rectangle(frame, eyes[j], Scalar(255, 0, 0), 2, 8, 0);
		}

		std::vector<Rect> nose;
		Rect nose_rect;
		nose_rect.x = faces[i].x;
		nose_rect.y = faces[i].y + 0.4*faces[i].height;
		nose_rect.width = faces[i].width;
		nose_rect.height = 0.4*faces[i].height;
		Mat nose_ROI = frame_gray(nose_rect);
		nose_cascade.detectMultiScale(nose_ROI, nose, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(minEyeSize, minEyeSize));

		for (int j = 0; j < nose.size(); j++)
		{
			nose[j].x = nose[j].x + faces[i].x;
			nose[j].y = nose[j].y + faces[i].y + 0.4*faces[i].height;

			rectangle(frame, nose[j], Scalar(0, 255, 0), 2, 8, 0);
		}

		std::vector<Rect> mouth;
		Rect mouth_rect;
		mouth_rect.x = faces[i].x;
		mouth_rect.y = faces[i].y + 0.7*faces[i].height;
		mouth_rect.width = faces[i].width;
		mouth_rect.height = 0.32*faces[i].height;
		Mat mouth_ROI = frame_gray(mouth_rect);
		mouth_cascade.detectMultiScale(mouth_ROI, mouth, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(minEyeSize, minEyeSize));

		for (int j = 0; j < mouth.size(); j++)
		{
			mouth[j].x = mouth[j].x + faces[i].x;
			mouth[j].y = mouth[j].y + faces[i].y + 0.7*faces[i].height;

			rectangle(frame, mouth[j], Scalar(0, 0, 255), 2, 8, 0);
		}
	}
	face = faces;
	imshow(window_name, frame); //-- Show what you got

}