非采样contourlet工具箱，里面有大量源代码。-Non-sampling Contourlet toolbox, which has a large number of source code.

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