End-to-End Visual Autonomous Parking via Control-Aided Attention

• URL: http://arxiv.org/abs/2509.11090v1
• Date: Sun, 14 Sep 2025 04:51:19 GMT
• Title: End-to-End Visual Autonomous Parking via Control-Aided Attention
• Authors: Chao Chen, Shunyu Yao, Yuanwu He, Tao Feng, Ruojing Song, Yuliang Guo, Xinyu Huang, Chenxu Wu, Ren Liu, Chen Feng,
• Abstract summary: CAA-Policy is an end-to-end imitation learning system for precise parking.<n>It allows control signal to guide the learning of visual attention via a novel Control-Aided Attention mechanism.
• Score: 30.52881549605385
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Precise parking requires an end-to-end system where perception adaptively provides policy-relevant details-especially in critical areas where fine control decisions are essential. End-to-end learning offers a unified framework by directly mapping sensor inputs to control actions, but existing approaches lack effective synergy between perception and control. We find that transformer-based self-attention, when used alone, tends to produce unstable and temporally inconsistent spatial attention, which undermines the reliability of downstream policy decisions over time. Instead, we propose CAA-Policy, an end-to-end imitation learning system that allows control signal to guide the learning of visual attention via a novel Control-Aided Attention (CAA) mechanism. For the first time, we train such an attention module in a self-supervised manner, using backpropagated gradients from the control outputs instead of from the training loss. This strategy encourages the attention to focus on visual features that induce high variance in action outputs, rather than merely minimizing the training loss-a shift we demonstrate leads to a more robust and generalizable policy. To further enhance stability, CAA-Policy integrates short-horizon waypoint prediction as an auxiliary task, and introduces a separately trained motion prediction module to robustly track the target spot over time. Extensive experiments in the CARLA simulator show that \titlevariable~consistently surpasses both the end-to-end learning baseline and the modular BEV segmentation + hybrid A* pipeline, achieving superior accuracy, robustness, and interpretability. Code is released at https://github.com/Joechencc/CAAPolicy.

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