不确定性加权的多任务学习,以实现可靠的交通场景语义理解.
Zhiping Wan1, Shitong Ye2, Feng Wang1
1School of Information and Intelligence Engineering, Guangzhou Xinhua University, Dongguan, 523133, China.
Scientific reports
|November 20, 2025
概括
本研究引入了一个不确定性加权的多任务学习框架 (UW-MTL),以提高在天气和堵塞等不利条件下对交通场景的理解. 这种新的方法显著改善了感知任务,特别是在具有挑战性的场景中.
科学领域:
- 计算机视觉 计算机视觉
- 人工智能的人工智能
- 机器人技术 机器人技术 机器人技术
背景情况:
- 自动驾驶汽车的感知系统因恶劣天气,阻塞和异步采样而面临着降低的传感器数据.
- 对交通场景的强有力的语义理解对于安全的导航和决策至关重要.
研究的目的:
- 开发一个新的框架,不确定性加权多任务学习 (UW-MTL),在具有挑战性的交通场景中进行强有力的感知.
- 为了提高关键任务的性能,如3D对象检测,BEV语义细分和轨迹预测.
主要方法:
- 可差异化的多源时空对齐,将摄像头,LiDAR,雷达和IMU的数据合并到鸟视图 (BEV) 序列中.
- 一个混合骨干,结合了专家变压器和时空图神经网络的混合,以实现平衡的全球和本地特征学习.
- 有证据的预测可以明确输出任务的信心和不确定性,通过软温度加权和梯度冲突解决,实现稳定的联合优化.
主要成果:
- 在nuScenes基准测试中,UW-MTL的表现始终优于 BEVFusion 和 UniAD 等现有方法.
- 在3D物体检测,BEV语义细分和轨迹预测方面观察到显著的性能增长.
- 该框架显示了在具有挑战性的条件下明显的改善,包括远距离检测,重度遮蔽和低可见度场景.
结论:
- 拟议的UW-MTL框架提供了一个强大的解决方案,用于在不利条件下对交通场景的语义理解.
- 显式建模不确定性可以提高自动驾驶感知中的多任务学习的可靠性和性能.
- UW-MTL表现出卓越的性能,特别是在传统方法失败的场景中.
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