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cs.CV2026
Seeing What Matters: Visual Preference Policy Optimization for Visual Generation
Ziqi Ni, Yuanzhi Liang, Rui Li +4
Reinforcement learning (RL) has become a powerful tool for post-training visual generative models, with Group Relative Policy Optimization (GRPO) increasingly used to align generat…
cs.CV2025
FREAK: Frequency-modulated High-fidelity and Real-time Audio-driven Talking Portrait Synthesis
Ziqi Ni, Ao Fu, Yi Zhou
Achieving high-fidelity lip-speech synchronization in audio-driven talking portrait synthesis remains challenging. While multi-stage pipelines or diffusion models yield high-qualit…