Papers › Training Generative Networks with general Optimal Transport distances
Training Generative Networks with general Optimal Transport distances
Vaios Laschos, Jan Tinapp, Klaus Obermayer
We propose a new algorithm that uses an auxiliary neural network to express the potential of the optimal transport map between two data distributions. In the sequel, we use the aforementioned map to train generative networks. Unlike WGANs, where the Euclidean distance is implicitly used, this new method allows to explicitly use any transportation cost function that can be chosen to match the problem at hand. For example, it allows to use the squared distance as a transportation cost function, giving rise to the Wasserstein-2 metric for probability distributions, which results in fast and stable gradient descends. It also allows to use image centered distances, like the structure similarity index, with notable differences in the results.
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