Learning Neural Random Fields with Inclusive Auxiliary Generators
Authors: Yunfu Song, Zhijian Ou
Keywords: Neural random fields, Deep generative models, Unsupervised learning, Semi-supervised learning
TL;DR: We develop a new approach to learning neural random fields and show that the new approach obtains state-of-the-art sample generation quality and achieves strong semi-supervised learning results on par with state-of-the-art deep generative models.
Abstract: Neural random fields (NRFs), which are defined by using neural networks to implement potential functions in undirected models, provide an interesting family of model spaces for machine learning. In this paper we develop a new approach to learning NRFs with inclusive-divergence minimized auxiliary generator - the inclusive-NRF approach, for continuous data (e.g. images), with solid theoretical examination on exploiting gradient information in model sampling. We show that inclusive-NRFs can be flexibly used in unsupervised/supervised image generation and semi-supervised classification, and empirically to the best of our knowledge, represent the best-performed random fields in these tasks. Particularly, inclusive-NRFs achieve state-of-the-art sample generation quality on CIFAR-10 in both unsupervised and supervised settings. Semi-supervised inclusive-NRFs show strong classification results on par with state-of-the-art generative model based semi-supervised learning methods, and simultaneously achieve superior generation, on the widely benchmarked datasets - MNIST, SVHN and CIFAR-10.