EditScore: Unlocking Online RL for Image Editing via High-Fidelity Reward Modeling - Luo, Xin; Wang, Jiahao; Wu, Chenyuan; Xiao, Shitao; Jiang, Xiyan; Lian, Defu; Zhang, Jiajun; Liu, Dong; Liu, Zheng (International Conference on Learning Representations, 2026)