Yu-Fei Jiao

SCOPE: Semantic Bounded Credit Optimization for Prompt Engineering in Text-to-image Generation

Reinforcement learning (RL) enables language models to improve text-to-image (T2I) generation by rewriting prompts for a frozen image generator. Existing methods typically apply a single signal derived from the image to individual subword tokens, although objects, counts, attributes, and relations form coherent semanti...