Eigenvalues and eigenvectors in PCA

OTB Usage
1

Is it possible to get the eigenvalues and eigenvectors for PCA with otbcli_DimensionalityReduction?
Is it possible to apply the inverse transform?
Thanks

2

Hello,

Unfortunately, it is not possible to get the eigenvalues and eigenvectors directly from the app, at the moment you can only output the “transformation matrix”, which is the whitening transformation D^-1/2 U , with D the matrix of eigenvalues and U the matrix of eigenvectors. You could retrieve them with this matrix, but I agree this is not very convenient.

And it is not possible to apply the inverse transform with the application. It is possible with the C++ API, but right now the transformation matrix cannot be serialized (we can write it in a text file, but there is nothing to read it to apply the transform).

Cédric