Improving Text-to-Image Generation with Intrinsic Self-Confidence Rewards

Text-to-image generation powers content creation across design, media, and data augmentation.Post-training of text-to-image generative models is a promising path to better match human preferences, factuality, and improved aesthetics.We introduce ARC (\textbf{A}daptive \textbf{R}ewarding by Self-\textbf{C}onfidence), a post-training framework that replaces external reward supervision with an internal self-confidence signal, obtained by evaluating how accurately the model recovers injected noise under self-denoising probes.ARC converts this intrinsic signal into scalar rewards, enabling fully unsupervised optimization without additional datasets, annotators, or reward models.Empirically, by reinforcing high-confidence generations, ARC delivers consistent gains in compositional generation, text rendering and text-image alignment over the baseline. We also find that integrating ARC with external rewards results in a complementary improvement, with alleviated reward hacking.