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Unified Trajectory Matching Policy Optimization: Diverse T2I Generation and VLA Generalization

Ma, Zhiyuan et al.
arXiv (All) · Papers
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computer-vision-and-pattern-recognition
Reward-maximizing reinforcement learning (RL) is widely used to post-train stochastic diffusion and flow policies for text-to-image (T2I) generation. However, reward-maximizing RL causes policy mode collapse even under reference KL or entropy regularization, reducing the policy to a single high-rewa
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