SIM-ELM: Connecting the ELM model with similarity-function learning

This paper moves from the affinities between two well-known learning schemes that apply randomization in the training process, namely, Extreme Learning Machines (ELMs) and the learning framework using similarity functions. These paradigms share a common approach involving data remapping and linear separators, but differ in the role of randomization within the respective learning algorithms. The paper presents an integrated approach connecting the two models, which ultimately yields a new variant of the basic ELM. The resulting learning scheme is characterized by an analytical relationship between the dimensionality of the remapped space and the learning abilities of the eventual predictor. Experimental results confirm that the new learning scheme can improve over conventional ELM in terms of the trade-off between classification accuracy and predictor complexity (i.e., the dimensionality of the remapped space).