DiGAN: Directional Generative Adversarial Network for Object Transfiguration

The concept of cycle consistency in couple mapping has helped CycleGAN illustrate remarkable performance in the context of image-to-image translation. However, its limitations in object transfiguration have not been ideally solved yet. In order to alleviate previous problems of wrong transformation position, degeneration, and artifacts, this work presents a new approach called Directional Generative Adversarial Network (DiGAN) in the field of object transfiguration. The major contribution of this work is threefold. First, paired directional generators are designed for both intra-domain and inter-domain generations. Second, a segmentation network based on Mask R-CNN is introduced to build conditional inputs for both generators and discriminators. Third, a feature loss and a segmentation loss are added to optimize the model. Experimental results indicate that DiGAN surpasses CycleGAN and AttentionGAN by 17.2% and 60.9% higher on Inception Score, 15.5% and 2.05% lower on Fréchet Inception Distance, and 14.2% and 15.6% lower on VGG distance, respectively, in horse-to-zebra mapping.