论文标题
GAMA:生成对抗性多对象场景攻击
GAMA: Generative Adversarial Multi-Object Scene Attacks
论文作者
论文摘要
制作对抗性攻击的大多数方法都集中在具有单个主体对象的场景上(例如,来自Imagenet的图像)。另一方面,自然场景包括多个具有语义相关的主要对象。因此,探索设计攻击策略至关重要,这些攻击策略超出了在单对象场景上学习或攻击单对象受害者分类器。由于其固有的属性将扰动对未知模型的强大可传递性强,因此本文介绍了使用生成模型对多对象场景的对抗性攻击的第一种方法。为了代表输入场景中不同对象之间的关系,我们利用开源的预训练的视觉语言模型剪辑(对比性语言图像 - 预训练),并动机利用语言空间中的语言语义以及视觉空间以及视觉空间的动机。我们称这种攻击方法生成对手多对象场景攻击(GAMA)。 GAMA展示了剪辑模型作为攻击者的工具的实用性,以训练可强大的扰动发生器,以实现多对象场景。使用联合图像文本功能来训练发电机,我们表明GAMA可以在各种攻击环境中制作有效的可转移扰动,以欺骗受害者分类器。例如,GAMA触发的错误分类比在黑框设置中的最新生成方法高出约16%,在黑盒设置中,分类器体系结构和攻击者的数据分布都与受害者不同。我们的代码可在此处提供:https://abhishekaich27.github.io/gama.html
The majority of methods for crafting adversarial attacks have focused on scenes with a single dominant object (e.g., images from ImageNet). On the other hand, natural scenes include multiple dominant objects that are semantically related. Thus, it is crucial to explore designing attack strategies that look beyond learning on single-object scenes or attack single-object victim classifiers. Due to their inherent property of strong transferability of perturbations to unknown models, this paper presents the first approach of using generative models for adversarial attacks on multi-object scenes. In order to represent the relationships between different objects in the input scene, we leverage upon the open-sourced pre-trained vision-language model CLIP (Contrastive Language-Image Pre-training), with the motivation to exploit the encoded semantics in the language space along with the visual space. We call this attack approach Generative Adversarial Multi-object scene Attacks (GAMA). GAMA demonstrates the utility of the CLIP model as an attacker's tool to train formidable perturbation generators for multi-object scenes. Using the joint image-text features to train the generator, we show that GAMA can craft potent transferable perturbations in order to fool victim classifiers in various attack settings. For example, GAMA triggers ~16% more misclassification than state-of-the-art generative approaches in black-box settings where both the classifier architecture and data distribution of the attacker are different from the victim. Our code is available here: https://abhishekaich27.github.io/gama.html