Variational Bi-domain Triplet Autoencoder.

We investigate deep generative models, which allow us to use training data from one domain to build a model for another domain. We consider domains to have similar structure (texts, images). We propose the Variational Bi-domain Triplet Autoencoder (VBTA) that learns a joint distribution of objects from different domains. There are many cases when obtaining any supervision (e.g. paired data) is difficult or ambiguous. For such cases we can seek a method that is able to the information about data relation and structure from the latent space. We extend the VBTAs objective function by the relative constraints or triplets that sampled from the shared latent space across domains. In other words, we combine the deep generative model with a metric learning ideas in order to improve the final objective with the triplets information. We demonstrate the performance of the VBTA model on different tasks: bi-directional image generation, image-to-image translation, even on unpaired data. We also provide the qualitative analysis. We show that VBTA model is comparable and outperforms some of the existing generative models.