여기서는 OpenCV에서 눈을 감지하는 방법을 배웁니다. 눈을 감지하기 위해 'C:/opencv/sources/data/haarcascades'에 있는 haarcascade_eye.xml 분류기를 사용합니다. 눈을 감지하려면 이 헤더를 추가해야 합니다.
첫 번째 헤더는
OpenCV에서 눈을 감지하고 추적하는 방법을 보여주는 다음 프로그램입니다.
예시
#include<iostream> #include<opencv2/highgui/highgui.hpp> #include<opencv2/imgproc/imgproc.hpp> #include<opencv2/objdetect/objdetect.hpp> using namespace cv; using namespace std; int main() { Mat frame;//declaring a matrix to video frame in it// namedWindow("Detect");//Declaring a window to show our work// VideoCapture image(0);//capturing video from default camera// if (!image.isOpened()){ //Error message if video source is not found// cout << "Couldn't load video from the source.Make sure your camera is working properly." << endl; system("pause"); return 0; } double height = image.set(CAP_PROP_FRAME_HEIGHT, 480);//setting up height of each frame// double width = image.set(CAP_PROP_FRAME_WIDTH, 640);//setting up width of each frame// CascadeClassifier face_cascade, eyes_cascade;//declaring a CascadeClassifier object// face_cascade.load("C:/opencv/sources/data/haarcascades/haarcascade_frontalface_alt.xml");//loading the cascade classifier// eyes_cascade.load("C:/opencv/sources/data/haarcascades/haarcascade_eye.xml"); while (true) { bool temp = image.read(frame);//loading video frames from source to our matrix named frame// vector<Rect>faces;//Declaring a vector named faces// face_cascade.detectMultiScale(frame, faces, 1.1, 2, 0 | CASCADE_SCALE_IMAGE, Size(100, 100));//detecting the face for (int i = 0; i < faces.size(); i++){ //for locating the face Point center(faces[i].x + faces[i].width * 0.5, faces[i].y + faces[i].height * 0.5);//getting the center of the face// ellipse(frame, center, Size(faces[i].width * 0.5, faces[i].height * 0.5), 0, 0, 360, Scalar(255, 0, 255), 4, 8, 0);//draw an ellipse on the face// Mat faceROI = frame(faces[i]);//Taking area of the face as Region of Interest for eyes// vectoreyes;//declaring a vector named eyes// eyes_cascade.detectMultiScale(faceROI, eyes, 1.1, 2, 0 | CASCADE_SCALE_IMAGE, Size(5, 5));//detect eyes in every face// for (size_t j = 0; j < eyes.size(); j++){ //for locating eyes// Point center(faces[i].x + eyes[j].x + eyes[j].width * 0.5, faces[i].y + eyes[j].y + eyes[j].height * 0.5);//getting the centers of both eyes// int radius = cvRound((eyes[j].width + eyes[j].height) * 0.25);//declaring radius of the eye enclosing circles// circle(frame, center, radius, Scalar(255, 0, 0), 4, 8, 0);//drawing circle around both eyes// } } imshow("Detect", frame);//showing result in window named 'Detect'// if (waitKey(30) == 27){ //wait time for each frame is 30 milliseconds// break; } } return 0; }
출력