Dynamic Competitive Probabilistic Principal Components Analysis Neural Network

E. López-Rubio, J.M. Ortiz-de-Lazcano-Lobato, and M. del Carmen Vargas-González (Spain)


Neural networks, local PCA, competitive learning


We present a new neural model which extends the classical competitive learning (CL) by performing a Probabilistic Principal Components Analysis (PPCA) at each neuron. The model also has the ability to learn the number of basis vectors required to represent the principal directions of each cluster, so it overcomes a drawback of most local PCA models, where the dimensionality of a cluster must be fixed a priori. Experimental results are presented to show the performance of the network when we use it with multispectral image data.

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