/// <summary>
/// Returns the node content as OpenCV Mat
/// </summary>
/// <returns></returns>
public Mat ToMat()
{
ThrowIfDisposed();
var matrix = new Mat();
NativeMethods.HandleException(
NativeMethods.core_FileNode_toMat(ptr, matrix.CvPtr));
GC.KeepAlive(this);
return(matrix);
}