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arXiv 2106.04066cs.CVcs.AI
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基于显式知识引导的语义对抗场景生成

Semantically Adversarial Scenario Generation with Explicit Knowledge Guidance

Carnegie Mellon University(卡内基梅隆大学);University of Illinois Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校)

Wenhao Ding, Haohong Lin, Bo Li, Ding Zhao

AI总结:

本研究针对自动驾驶场景鲁棒性测试需求,提出显式融入领域知识的语义对抗生成方法,通过树结构变分自编码器实现可控生成,可高效识别攻击3D点云分割模型的对抗驾驶场景。

摘要:

生成可能导致自动驾驶系统失效的对抗场景,是提升系统鲁棒性的有效途径。近年来的专用模型在纯数据驱动生成模型的基础上进行拓展,通过在神经元层面隐式操控模式,满足了诸如将交通标志嵌入驾驶场景等额外可控需求。本文提出一种在生成过程中显式融入领域知识的方法,以实现语义对抗生成(Semantically Adversarial Generation,SAG)。为契合驾驶场景的构成逻辑,我们首先将知识划分为两类:物体属性与物体间关系。随后提出树结构变分自编码器(tree-structured variational auto-encoder,T-VAE)用于学习分层场景表征。通过在树结构的节点属性和边属性上施加语义规则,显式知识集成实现了可控生成。我们构建了一个合成示例,在简洁设置下阐释了本方法的可控性与可解释性。我们进一步将方法拓展至自动驾驶的真实环境:本方法能高效识别出可攻击多种前沿3D点云分割模型的对抗驾驶场景,且满足以显式知识形式定义的交通规则。

英文摘要:

Generating adversarial scenarios, which have the potential to fail autonomous driving systems, provides an effective way to improve robustness. Extending purely data-driven generative models, recent specialized models satisfy additional controllable requirements such as embedding a traffic sign in a driving scene by manipulating patterns implicitly in the neuron level. In this paper, we introduce a method to incorporate domain knowledge explicitly in the generation process to achieve the Semantically Adversarial Generation (SAG). To be consistent with the composition of driving scenes, we first categorize the knowledge into two types, the property of objects and the relationship among objects. We then propose a tree-structured variational auto-encoder (T-VAE) to learn hierarchical scene representation. By imposing semantic rules on the properties of nodes and edges in the tree structure, explicit knowledge integration enables controllable generation. We construct a synthetic example to illustrate the controllability and explainability of our method in a succinct setting. We further extend to realistic environments for autonomous vehicles: our method efficiently identifies adversarial driving scenes against different state-of-the-art 3D point cloud segmentation models and satisfies the traffic rules specified as the explicit knowledge.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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