NSCT非下采样Contourlet变换，实现对图像的多尺度多方向分解，是一种真正的二维图像表示方法-NSCT nonsubsampled Contourlet transform, to achieve multi-scale multi-orientation image decomposition, is a true two-dimensional image representation

Nonsubsampled Contourlet Toolbox: MATLAB source code that implements the nonsubsampled contourlet transform as described in the paper The nonsubsampled contourlet transform: Theory, design, and applications.

Nonsubsampled Contourlet Transform