Domaindiff: Boost out-of-Distribution Generalization with Synthetic Data

Qiaowei Miao, Junkun Yuan, Shengyu Zhang, Fei Wu, Kun Kuang

Abstract: In contemporary machine learning, enhancing model generalization through diversified datasets is essential. Yet, collecting additional data often faces prohibitive costs and privacy constraints, with no guarantee of improved diversity. In this paper, we propose Domain-Diff, featuring a pivotal Word-to-Image Mapping (WIM) mechanism. WIM constructs precise mapping between prompts and images, where the prompts only comprise style and class words. It generates intra-domain data by employing identical prompts to produce source-style images, preserving style and class consistency, thereby diversifying the dataset. Expanding on this innovation, we fuse multiple WIMs and use the prompts with multiple style words to create inter-domain data, which captures a fusion style of multiple source domains. Inter-domain data significantly widens the training data distribution, amplifying diversity. Experimental results demonstrate DomainDiff’s transformative potential, improving model performance on real-world data compared to using only real data. These findings highlight DomainDiff’s utility in enhancing generalization across diverse real-world scenarios.