Black-box Targeted Adversarial Attack on Segment Anything (SAM)
CoRR(2023)
Abstract
Deep recognition models are widely vulnerable to adversarial examples, which
change the model output by adding quasi-imperceptible perturbation to the image
input. Recently, Segment Anything Model (SAM) has emerged to become a popular
foundation model in computer vision due to its impressive generalization to
unseen data and tasks. Realizing flexible attacks on SAM is beneficial for
understanding the robustness of SAM in the adversarial context. To this end,
this work aims to achieve a targeted adversarial attack (TAA) on SAM.
Specifically, under a certain prompt, the goal is to make the predicted mask of
an adversarial example resemble that of a given target image. The task of TAA
on SAM has been realized in a recent arXiv work in the white-box setup by
assuming access to prompt and model, which is thus less practical. To address
the issue of prompt dependence, we propose a simple yet effective approach by
only attacking the image encoder. Moreover, we propose a novel regularization
loss to enhance the cross-model transferability by increasing the feature
dominance of adversarial images over random natural images. Extensive
experiments verify the effectiveness of our proposed simple techniques to
conduct a successful black-box TAA on SAM.
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