Author

Yujie Wei

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#machine learning May 2026

DiffusionOPD: A Unified Perspective of On-Policy Distillation in Diffusion Models

Theoretically, the OPD framework is lifted from discrete tokens to continuous-state Markov processes, deriving a closed-form per-step KL objective that unifies both stochastic SDE and deterministic ODE refinement via mean-matching, which provides lower variance and better generality compared to conventional PPO-style p...

Quanhao Li, Jun-Qiu Yu, Kai-Xun Jiang et al. · arXiv.org · 34 citations · ⚡10

Jul 2026

RefCaptioner: Multi-Reference Image-Grounded Video Captioning

Human evaluation confirms that RefCaptioner achieves the best overall performance among the open-source models while remaining competitive on standard video captioning benchmarks, and human evaluation further confirms that its captions are preferred by annotators and enable more source-faithful video reconstruction wit...

Teng-Fei Liu, Yang Shi, Yu-Ran Wang et al. · arXiv.org · 0 citations