Вектор внутри структуры.

struct ImageWithData{
    cv::Mat img;
    std::vector <cv::Rect> faces;
    std::vector <cv::Point2f> points;
};

void initStorage(VideoCapture capture,vector <ImageWithData> storage,string cascade_filename) {
    Mat frame;
    std::vector< cv::Point2f > points;
    vector <cv::Rect> faces;
    while (frame.empty()) capture >> frame;
    while(points.empty()){
        faces = DetectHaarOnImage(frame, cascade_filename);
        cv::Mat mask = getMaskByRectangleArray(frame, faces);
        points = gF2T(frame, mask);
    }
     SaveImg(storage, frame, faces, points);


}
void SaveImg(vector <ImageWithData> storage, cv::Mat img,
    std::vector <cv::Rect> faces,
    std::vector <cv::Point2f> points =  std::vector <cv::Point2f>()){
    ImageWithData s;
    img.copyTo(s.img);
    s.faces.assign(faces.begin(),faces.end());
    s.points.assign(points.begin(),points.end());
    storage.push_back(s);
    if (storage.size() > 10)
        storage.erase(storage.begin());
}