/** * @file objectDetection2.cpp * @author A. Huaman ( based in the classic facedetect.cpp in samples/c ) * @brief A simplified version of facedetect.cpp, show how to load a cascade classifier and how to find objects (Face + eyes) in a video stream - Using LBP here */ #include "opencv2/objdetect.hpp" #include "opencv2/videoio.hpp" #include "opencv2/highgui.hpp" #include "opencv2/imgproc.hpp" #include #include using namespace std; using namespace cv; /** Function Headers */ void detectAndDisplay( Mat frame ); /** Global variables */ String face_cascade_name = "lbpcascade_frontalface.xml"; String eyes_cascade_name = "haarcascade_eye_tree_eyeglasses.xml"; CascadeClassifier face_cascade; CascadeClassifier eyes_cascade; String window_name = "Capture - Face detection"; /** * @function main */ int main( void ) { VideoCapture capture; Mat frame; //-- 1. Load the cascade if( !face_cascade.load( face_cascade_name ) ){ printf("--(!)Error loading face cascade\n"); return -1; }; if( !eyes_cascade.load( eyes_cascade_name ) ){ printf("--(!)Error loading eyes cascade\n"); return -1; }; //-- 2. Read the video stream capture.open( -1 ); if ( ! capture.isOpened() ) { printf("--(!)Error opening video capture\n"); return -1; } while ( capture.read(frame) ) { if( frame.empty() ) { printf(" --(!) No captured frame -- Break!"); break; } //-- 3. Apply the classifier to the frame detectAndDisplay( frame ); //-- bail out if escape was pressed int c = waitKey(10); if( (char)c == 27 ) { break; } } return 0; } /** * @function detectAndDisplay */ void detectAndDisplay( Mat frame ) { std::vector faces; Mat frame_gray; cvtColor( frame, frame_gray, COLOR_BGR2GRAY ); equalizeHist( frame_gray, frame_gray ); //-- Detect faces face_cascade.detectMultiScale( frame_gray, faces, 1.1, 2, 0, Size(80, 80) ); for( size_t i = 0; i < faces.size(); i++ ) { Mat faceROI = frame_gray( faces[i] ); std::vector eyes; //-- In each face, detect eyes eyes_cascade.detectMultiScale( faceROI, eyes, 1.1, 2, 0 |CASCADE_SCALE_IMAGE, Size(30, 30) ); if( eyes.size() == 2) { //-- Draw the face Point center( faces[i].x + faces[i].width/2, faces[i].y + faces[i].height/2 ); ellipse( frame, center, Size( faces[i].width/2, faces[i].height/2 ), 0, 0, 360, Scalar( 255, 0, 0 ), 2, 8, 0 ); for( size_t j = 0; j < eyes.size(); j++ ) { //-- Draw the eyes Point eye_center( faces[i].x + eyes[j].x + eyes[j].width/2, faces[i].y + eyes[j].y + eyes[j].height/2 ); int radius = cvRound( (eyes[j].width + eyes[j].height)*0.25 ); circle( frame, eye_center, radius, Scalar( 255, 0, 255 ), 3, 8, 0 ); } } } //-- Show what you got imshow( window_name, frame ); }