Intriguing Frequency Interpretation of Adversarial Robustness for CNNs and ViTs

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Main Authors: Chen, Lu, Yang, Han, Wang, Hu, Cao, Yuxin, Li, Shaofeng, Luo, Yuan
Format: Preprint
Published: 2025
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author Chen, Lu
Yang, Han
Wang, Hu
Cao, Yuxin
Li, Shaofeng
Luo, Yuan
author_facet Chen, Lu
Yang, Han
Wang, Hu
Cao, Yuxin
Li, Shaofeng
Luo, Yuan
contents Adversarial examples have attracted significant attention over the years, yet understanding their frequency-based characteristics remains insufficient. In this paper, we investigate the intriguing properties of adversarial examples in the frequency domain for the image classification task, with the following key findings. (1) As the high-frequency components increase, the performance gap between adversarial and natural examples becomes increasingly pronounced. (2) The model performance against filtered adversarial examples initially increases to a peak and declines to its inherent robustness. (3) In Convolutional Neural Networks, mid- and high-frequency components of adversarial examples exhibit their attack capabilities, while in Transformers, low- and mid-frequency components of adversarial examples are particularly effective. These results suggest that different network architectures have different frequency preferences and that differences in frequency components between adversarial and natural examples may directly influence model robustness. Based on our findings, we further conclude with three useful proposals that serve as a valuable reference to the AI model security community.
format Preprint
id arxiv_https___arxiv_org_abs_2506_12875
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Intriguing Frequency Interpretation of Adversarial Robustness for CNNs and ViTs
Chen, Lu
Yang, Han
Wang, Hu
Cao, Yuxin
Li, Shaofeng
Luo, Yuan
Computer Vision and Pattern Recognition
Machine Learning
Adversarial examples have attracted significant attention over the years, yet understanding their frequency-based characteristics remains insufficient. In this paper, we investigate the intriguing properties of adversarial examples in the frequency domain for the image classification task, with the following key findings. (1) As the high-frequency components increase, the performance gap between adversarial and natural examples becomes increasingly pronounced. (2) The model performance against filtered adversarial examples initially increases to a peak and declines to its inherent robustness. (3) In Convolutional Neural Networks, mid- and high-frequency components of adversarial examples exhibit their attack capabilities, while in Transformers, low- and mid-frequency components of adversarial examples are particularly effective. These results suggest that different network architectures have different frequency preferences and that differences in frequency components between adversarial and natural examples may directly influence model robustness. Based on our findings, we further conclude with three useful proposals that serve as a valuable reference to the AI model security community.
title Intriguing Frequency Interpretation of Adversarial Robustness for CNNs and ViTs
topic Computer Vision and Pattern Recognition
Machine Learning
url https://arxiv.org/abs/2506.12875