I have a large face database, and I want to search through it. For example, if I input a new face image, the system would return the best N similarities.

I know that PCA, LDA, and Procrustes analysis are used for this, but it seems that I need to project all this large database into PCA space, and I don't know any library that can handle that.

Are there some tools, software, or a library for this?