store Mat data opencv

Mat mat_eye = Mat::eye(Size(10,10), CV_8UC1);
 FileStorage fs(".\\vocabulary.xml", FileStorage::WRITE);
 fs<<"vocabulary"<<mat_eye;
 fs.release();

 

在另一处，需要加载这个矩阵数据。代码如下：

FileStorage fs(".\\vocabulary.xml", FileStorage::READ);
 Mat mat_vocabulary;
 fs["vocabulary"] >> mat_vocabulary;