Image-to-image translation task has become a popular topic recently. Most works focus on either one-to-one mapping in an unsupervised way or many-to-many mapping in a supervised way. However, a more practical setting is many-to-many mapping in an unsupervised way, which is harder due to the lack of supervision and the complex inner and cross-domain variations. To alleviate these issues, we propose the Exemplar Guided UNsupervised Image-to-image Translation (EG-UNIT) network which conditions the image translation process on an image in the target domain. An image representation is assumed to comprise both content information which is shared across domains and style information specific to one domain. By applying exemplar-based adaptive instance normalization to the shared content representation, EG-UNIT manages to transfer the style information in the target domain to the source domain. Experimental results on various datasets show that EG-UNIT can indeed translate the source image to diverse instances in the target domain with semantic consistency.

本篇文章介绍了 Exemplar Guided & Semantically Consistent Image-to-image Translation (EGSC-IT)网络，并用 feature masks 实现了语义上的一致性。实验结果验证，EGSC-IT 能够保持语义上的一致性，从而有效地将源图像转换为目标域中的多样性实例。

具有语义一致性的示例引导无监督图像到图像翻译