Hirano, Shinnosuke, Yuiga Wada, Kazuki Matsuda, Seitaro Otsuki, and Komei Sugiura. “LLM-Free Image Captioning Evaluation in Reference-Flexible Settings”. Proceedings of the AAAI Conference on Artificial Intelligence 40, no. 6 (March 14, 2026): 4708–4716. Accessed May 15, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/42472.