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Evaluating Worst Case Adversarial Weather Perturbations Robustness
Yihan Wang · Yunhao Ba · Howard Zhang · Huan Zhang · Achuta Kadambi · Stefano Soatto · Alex Wong · Cho-Jui Hsieh
Several algorithms are proposed to improve the robustness of deep neural networks against adversarial perturbations beyond $\ell_p$ cases, i.e. weather perturbations. However, evaluations of existing robust training algorithms are over-optimistic. This is in part due to the lack of a standardized evaluation protocol across various robust training algorithms, leading to ad-hoc methods that test robustness on either random perturbations or the adversarial samples from generative models that are used for robust training, which is either uninformative of the worst case, or is heavily biased.In this paper, we identify such evaluation bias in these existing works and propose the first standardized and fair evaluation that compares various robust training algorithms by using physics simulators for common adverse weather effects i.e. rain and snow.With this framework, we evaluated several existing robust training algorithms on two streetview classification datasets (BIC\_GSV, Places365) and show the evaluation bias in experiments.

#### Author Information

##### Stefano Soatto (UCLA)

Stefano Soatto received his Ph.D. in Control and Dynamical Systems from the California Institute of Technology in 1996; he joined UCLA in 2000 after being Assistant and then Associate Professor of Electrical Engineering and Biomedical Engineering at Washington University, and Research Associate in Applied Sciences at Harvard University. Between 1995 and 1998 he was also Ricercatore in the Department of Mathematics and Computer Science at the University of Udine - Italy. He received his D.Ing. degree (highest honors) from the University of Padova- Italy in 1992. His general research interests are in Computer Vision and Nonlinear Estimation and Control Theory. In particular, he is interested in ways for computers to use sensory information to interact with humans and the environment. Dr. Soatto is the recipient of the David Marr Prize for work on Euclidean reconstruction and reprojection up to subgroups. He also received the Siemens Prize with the Outstanding Paper Award from the IEEE Computer Society for his work on optimal structure from motion. He received the National Science Foundation Career Award and the Okawa Foundation Grant. He is a Member of the Editorial Board of the International Journal of Computer Vision (IJCV) and Foundations and Trends in Computer Graphics and Vision. He is the founder and director of the UCLA Vision Lab; more information is available at http://vision.ucla.edu