Image-to-image translation has been widely investigated in recent years. Existing approaches are elaborately designed in an unsupervised manner and little attention has been paid to domain information beneath unpaired data. In this work, we treat domain information as explicit supervision and design an unpaired image-to-image translation framework, Domain-supervised GAN (briefly, DosGAN), that takes the first step towards exploration of domain supervision. Instead of representing domain characteristics with different generators in CycleGAN\cite{zhu2017unpaired} or multiple domain codes in StarGAN~\cite{choi2017stargan}, we pre-train a classification network to classify the domain of an image. After pre-training, this network is used to extract domain features of each image by using the output of its second-to-last layer. Such features, together with the latent semantic features extracted by another encoder (shared across different domains), are used to generate an image in the target domain. Experiments on multiple hair color translation, multiple identity translation and conditional edges-to-shoes/handbags demonstrate the effectiveness of our method. In addition, we transfer the domain feature extractor obtained on the Facescrub dataset with domain supervision information, to the CelebA dataset without domain supervision information, and succeed achieving conditional translation with any two images in CelebA, while previous models like StarGAN cannot handle this task. Our code is available at \url{https://github.com/linjx-ustc1106/DosGAN-PyTorch}.

本文提出了一种基于显式域监督的非配对图像翻译框架DosGAN，该框架使用分类网络提取每个图像的域特定特征，并使用另一个编码器提取域无关的特征，二者结合生成目标域的图像。该方法在多个数据集上进行了实验，证明了其有效性，并且可以进行任何两个图像之间的有条件翻译，而以前的模型不能处理此任务。

探索显式领域监督在无配对图像翻译中的潜在空间解缠