OpenCV 3 Read Write FileStorage YAML Example

opencv-filestorage.cpp

// 
// OpenCV provides an easy class interface for read and write cv::Mat 
// can also use these with Eigen by converting eigen mat to cv::Mat using
//    cv::cv2eigen() and cv::eigen2cv()

// Writing to file
cv::FileStorage storage("test.yml", cv::FileStorage::WRITE);
storage << "img" << img;
storage.release();  


// Reading from file
cv::FileStorage storage("test.yml", cv::FileStorage::READ);
storage["img"] >> img;
storage.release();