The goal of I2I(image-to-image) is to convert an input image $x_A$ frim the socurce domain $A$ to a target domain $B$ with the intrinsic source content preserved and the extrinsic target style transferred

1. Backbone of I2I
1-1. Variational AutoEncoder
1-2. Generative Adversarial Networks
1-3. Evaluation Metrics
2. Two-Domain Image-To-Image Translation

2-1. Supervised I2I Translation
2-1-1. Single-modal Output
2-1-2. Multi-modal Output
2-2. Unsupervised I2I Translation (UI2I)
2-2-1. Single-modal Output
- Translation using Cycle-consistency Constraint
- Translation beyond Cycle-consistency Constraint
- Translation of Fine-grained Objects
- Translation by combining knowledge in other fields
2-2-2. Multi-modal Output