论文标题
在对抗攻击下,深3D点云模型的等距鲁棒性
On Isometry Robustness of Deep 3D Point Cloud Models under Adversarial Attacks
论文作者
论文摘要
尽管3D领域的深度学习在许多任务中都取得了革命性的表现,但这些模型的鲁棒性尚未得到充分研究或探索。关于3D对抗样本,大多数现有作品都集中在对局部点的操纵上,这些点可能无法调用全局几何特性,例如在线性投影下保持欧几里得距离的稳健性,即等距。在这项工作中,我们表明现有的最新深3D模型极易受到等轴测转换的影响。在汤普森(Thompson)的采样中,我们开发了一个黑盒攻击,成功率超过95%,在ModelNet40数据集上。与限制的等轴测特性合并,我们提出了一个新型的在基于光谱规范扰动之上的白盒攻击的框架。与以前的作品相反,我们的对抗样本在实验上被证明是可转移的。通过一系列流行的3D模型进行了评估,我们的白盒攻击将成功率从98.88%提高到100%。即使在不可察觉的旋转范围内,它仍然保持超过95%的攻击率$ [\ pm 2.81^{\ circ}] $。
While deep learning in 3D domain has achieved revolutionary performance in many tasks, the robustness of these models has not been sufficiently studied or explored. Regarding the 3D adversarial samples, most existing works focus on manipulation of local points, which may fail to invoke the global geometry properties, like robustness under linear projection that preserves the Euclidean distance, i.e., isometry. In this work, we show that existing state-of-the-art deep 3D models are extremely vulnerable to isometry transformations. Armed with the Thompson Sampling, we develop a black-box attack with success rate over 95% on ModelNet40 data set. Incorporating with the Restricted Isometry Property, we propose a novel framework of white-box attack on top of spectral norm based perturbation. In contrast to previous works, our adversarial samples are experimentally shown to be strongly transferable. Evaluated on a sequence of prevailing 3D models, our white-box attack achieves success rates from 98.88% to 100%. It maintains a successful attack rate over 95% even within an imperceptible rotation range $[\pm 2.81^{\circ}]$.