Filter type	Filter matrix	Application
Low-pass filters	$\left[\begin{array}{ccc}1\hfill & 2& 1\\ 2\hfill & 4& 2\\ 1\hfill & 2& 1\end{array}\right]/16.0\left[\begin{array}{ccccc}1& 4& 6& 4& 1\\ 4& 16& 24& 16& 4\\ 6& 24& 64& 24& 6\\ 4& 16& 24& 16& 4\\ 1& 4& 6& 4& 1\end{array}\right]/256.0$	Applied to original 2D images for noise reduction and blurring of irrelevant details
High-pass filters	$\left[\begin{array}{ccc}-1& -1& -1\\ -1& 8& -1\\ -1& -1& -1\end{array}\right]\left[\begin{array}{ccc}0& -1& 0\\ -1& 4& -1\\ 0& -1& 0\end{array}\right]$	Emphasizes edges and fine details in original 2D images
Sobel operator (Ver.)/(Hor.)	$\left[\begin{array}{ccc}-1& -2& -1\\ 0& 0& 0\\ 1& 2& 1\end{array}\right]\left[\begin{array}{ccc}-1& 0& 1\\ -2& 0& 2\\ -1& 0& 1\end{array}\right]$	Highlights horizontal and vertical edges