Function read

deps/opencv/modules/core/src/persistence.cpp:5531–5554

void read( const FileNode& node, Mat& mat, const Mat& default_mat )
{
    if( node.empty() )
    {
        default_mat.copyTo(mat);
        return;
    }
    void* obj = cvRead((CvFileStorage*)node.fs, (CvFileNode*)*node);
    if(CV_IS_MAT_HDR_Z(obj))
    {
        Mat((const CvMat*)obj).copyTo(mat);
        cvReleaseMat((CvMat**)&obj);
    }
    else if(CV_IS_MATND_HDR(obj))
    {
        Mat((const CvMatND*)obj).copyTo(mat);
        cvReleaseMatND((CvMatND**)&obj);
    }
    else
    {
        cvRelease(&obj);
        CV_Error(CV_StsBadArg, "Unknown array type");
    }
}

void read( const FileNode& node, SparseMat& mat, const SparseMat& default_mat )
{