arXiv Computer Vision By Zeping Zhang, Zhuoya Zhao, Robert Lagani\`ere

Let LiDAR Decide Where to Look: Geometry-Measured Token Selection for Efficient Sparse Latent World Models

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The paper introduces Geometry-Aware Token Selection (GATS), a method that uses LiDAR and radar point projections to filter image tokens before they enter a vision backbone, thereby reducing computational load. By encoding only the selected patches, GATS cuts FLOPs by up to 18× while maintaining or improving performance on nuScenes and NAVSIM benchmarks. Even with a 10% token budget, the approach outperforms dense models in displacement error and collision rate on intent‑critical scenarios.

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