这是一个MATLAB工具箱包括32个降维程序，主要包括 pca,lda,MDS等十几个程序包，对于图像处理非常具有参考价值- ，This Matlab toolbox implements 32 techniques for dimensionality reduction. These techniques are all available through the COMPUTE_MAPPING function or trhough the GUI. The following techniques are available:



- Principal Component Analysis ( PCA )

- Linear Discriminant Analysis ( LDA )

- Multidimensional scaling ( MDS )

- Probabilistic PCA ( ProbPCA )

- Factor analysis ( FactorAnalysis )

- Sammon mapping ( Sammon )

- Isomap ( Isomap )

- Landmark Isomap ( LandmarkIsomap )

- Locally Linear Embedding ( LLE )

- Laplacian Eigenmaps ( Laplacian )

- Hessian LLE ( HessianLLE )

- Local Tangent Space Alignment ( LTSA )

- Diffusion maps ( DiffusionMaps )

- Kernel PCA ( KernelPCA )

- Generalized Discriminant Analysis ( KernelLDA )