Author

Xiao-Huan Pei

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Preprint Sep 2026

Region-Level Policy Optimization for Fine-grained MLLM Perception

Fine-grained visual perception in MLLMs is commonly improved by raising the resolution, but the added visual tokens inflate vision-encoding and language-model prefilling costs. We show that the two operations underlying fine-grained perception, localizing the region of interest (RoI) and recognizing its content, have d...

Yuheng Shi, Xiao-Huan Pei, Min-Jing Dong et al. · 0 citations

#artificial intelligence Preprint Sep 2026

SlackDrive: Reclaiming Runtime Slack for Adaptive Driving Inference

SlackDrive is proposed, a pre-inference compute allocator that reuses realized latency to select the compute budget of each control step before model execution, complementing existing profiling and resource scheduling while preserving the driving backbone and its compute actuator.

Xiao-Huan Pei, Heng-Guang Zhou, Yuan-Hao Ban et al. · 0 citations

Preprint Aug 2026

Stream4D: 4D-Consistency for Streaming Autoregressive Diffusion Video Models

This work replaces the static critic with a feed-forward 4D reconstruction reward that explicitly models scene dynamics, allowing coherent motion to receive high consistency rewards, and adds a motion prior that rewards natural scene-flow magnitude while penalizing jitter and non-rigid artifacts.

Yuan-Hao Ban, Jia-Qi Feng, Heng-Guang Zhou et al. · 0 citations