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GSmooth: Certified Robustness against Semantic Transformations via Generalized Randomized Smoothing. (arXiv:2206.04310v2 [cs.LG] UPDATED)
June 30, 2022, 1:12 a.m. | Zhongkai Hao, Chengyang Ying, Yinpeng Dong, Hang Su, Jun Zhu, Jian Song
cs.CV updates on arXiv.org arxiv.org
Certified defenses such as randomized smoothing have shown promise towards
building reliable machine learning systems against $\ell_p$-norm bounded
attacks. However, existing methods are insufficient or unable to provably
defend against semantic transformations, especially those without closed-form
expressions (such as defocus blur and pixelate), which are more common in
practice and often unrestricted. To fill up this gap, we propose generalized
randomized smoothing (GSmooth), a unified theoretical framework for certifying
robustness against general semantic transformations via a novel dimension
augmentation strategy. …
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