Customizing GAN Using Few-shot Sketches

Generative adversarial networks (GANs) have demonstrated remarkable success in image synthesis applications, but their performance deteriorates under limited data regimes. The fundamental challenge is that it is extremely difficult to synthesize photo-realistic and highly diversified images while capturing meaningful attributes of the targets under minimum supervision. Previous methods either fine-tune or rewrite the model weights to adapt to few-shot datasets. However, this either overfits or requires access to large-scale data on which they are trained. To tackle the problem, we propose a framework that repurposes the existing pre-trained generative models using only a few samples (e.g., <30) of sketches. Unlike previous works, we transfer the sample diversity and quality without accessing the source data using inter-domain distance consistency. By employing cross-domain adversarial learning, we encourage the model output to closely resemble the input sketches in both shape and pose. Extensive experiments show that our method significantly outperforms the existing approaches in terms of sample quality and diversity. The qualitative and quantitative results on various standard datasets also demonstrate its efficacy. On the most popularly used dataset, Gabled church, we achieve a Fréchet inception distance (FID) score of 15.63.