Improving Subject-Driven Image Synthesis with Subject-Agnostic Guidance
This addresses a key limitation in personalized image generation for users, though it appears incremental as it builds on existing customization methods.
The paper tackles the problem of subject-driven text-to-image synthesis where reference images dominate over text prompts, proposing Subject-Agnostic Guidance (SAG) to balance subject and text alignment, resulting in substantial quality improvements validated through evaluations and user studies.
In subject-driven text-to-image synthesis, the synthesis process tends to be heavily influenced by the reference images provided by users, often overlooking crucial attributes detailed in the text prompt. In this work, we propose Subject-Agnostic Guidance (SAG), a simple yet effective solution to remedy the problem. We show that through constructing a subject-agnostic condition and applying our proposed dual classifier-free guidance, one could obtain outputs consistent with both the given subject and input text prompts. We validate the efficacy of our approach through both optimization-based and encoder-based methods. Additionally, we demonstrate its applicability in second-order customization methods, where an encoder-based model is fine-tuned with DreamBooth. Our approach is conceptually simple and requires only minimal code modifications, but leads to substantial quality improvements, as evidenced by our evaluations and user studies.