Rect-ViT:通过特征归属来纠正注意力可以提高视觉转换器的对抗性强度
1State Key Laboratory of Integrated Services Networks, Xidian University, 710071, China.
概括
视觉转换器 (ViT) 通过使用与类相关的梯度纠正特征,对对抗性示例 (AE) 显示出更好的稳定性. Rect-ViT对准了代币激活分布,在对抗训练 (AT) 中增强了ViT的稳定性.
科学领域:
- 计算机视觉 计算机视觉
- 机器学习 机器学习
- 深度学习 (Deep Learning) 是一种深度学习.
背景情况:
- 深度神经网络 (DNN) 容易受到对抗性实例 (AE) 的攻击,原因是稳健和非稳健特征之间的分布差异.
- 视觉转换器 (ViT) 显示出比卷积神经网络 (CNN) 更强大的稳定性.
- 反对训练 (AT) 是提高模型稳定性的关键技术.
研究的目的:
- 研究ViT注意力机制中的激活分布和强大的特征之间的关系.
- 在预测AEs时解决ViTs中无关符号激活的问题,这阻碍了稳定性.
- 提出一种新的方法,Rect-ViT,以提高ViT对抗对方攻击的稳定性.
主要方法:
- 在ViTs的AT期间研究了自然和对抗性示例之间的代币分布差异.
- 开发了Rect-ViT,它利用与类相关的梯度来纠正强大的特征.
- 实施了辅助令牌的相关性反向传播,以对齐令牌激活分布.
主要成果:
- Rect-ViT有效地纠正和调整令牌激活分布,在AT期间提高ViT的稳定性.
- 拟议的纠正注意力机制可以适应各种ViT架构和AT方法 (TRADES,MART).
- 针对四种攻击方法,Rect-ViT实现了0.64%的CIFAR10和1.72%的Imagenette的平均强大的精度改进.
结论:
- Rect-ViT通过解决非强大的特征提取来提高视觉转换器在对抗实例的稳定性.
- 该方法对安全关键的应用和复杂的视觉任务具有实际意义.
- Rect-ViT代表了在提高ViT对敌对干扰的弹性方面取得的重大进展.
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