void numberOfFaces(string filePath)
{
if (!instance.get()) {
CascadeClassifier* face_cascade = new CascadeClassifier();
face_cascade->load(face_cascade_name);
instance.reset(face_cascade);
}
Mat faceImage = imread(filePath, IMREAD_COLOR);
if (faceImage.empty()) // Check for invalid input
{
cout << "Could not open or find the image" << endl;
return;
}
Mat frame_gray;
std::vector<Rect> faces;
cvtColor(faceImage, frame_gray, CV_BGR2GRAY);
equalizeHist(frame_gray, frame_gray);
instance->detectMultiScale(frame_gray, faces, 1.1, 2, 0 | CV_HAAR_SCALE_IMAGE, Size(30, 30));
int numFaces = faces.size();
//cout << "Found " << numFaces << " faces in image: " << filePath << endl;
totalFaces.fetch_add(numFaces, boost::memory_order_seq_cst);
//cout << "Total: " << totalFaces << endl;
/*if (numFaces > 0)
{
drawFaceElipse(faceImage, faces);
}*/
}
