Optimal Transport (OT) problem aims to find a transport plan that bridges two distributions while minimizing a given cost function. OT theory has been widely utilized in generative modeling. In the beginning, OT distance has been used as a measure for assessing the distance between data and generated distributions. Recently, OT transport map between data and prior distributions has been utilized as a generative model. These OT-based generative models share a similar adversarial training objective. In this paper, we begin by unifying these OT-based adversarial methods within a single framework. Then, we elucidate the role of each component in training dynamics through a comprehensive analysis of this unified framework. Moreover, we suggest a simple but novel method that improves the previously best-performing OT-based model. Intuitively, our approach conducts a gradual refinement of the generated distribution, progressively aligning it with the data distribution. Our approach achieves a FID score of 2.51 on CIFAR-10, outperforming unified OT-based adversarial approaches.

以单一框架统一 Optimal Transport（OT）为基础的对抗方法，通过对统一框架的全面分析来阐明每个组成部分在训练动力学中的作用。我们提出了一个简单而新颖的方法，逐步改进生成分布，并逐渐与数据分布对齐。该方法在 CIFAR-10 上实现了 2.51 的 FID 得分，胜过了统一的基于 OT 的对抗方法。

分析和改进基于 OT 的对抗网络