Adversarial Patch Adversarial Patch
Paper summary Brown et al. Introduce a universal adversarial patch that, when added to an image, will cause a targeted misclassification. The concept is illustrated in Figure 1; essentially, a “sticker” is computed that, when placed randomly on an image, causes misclassification. In practice, the objective function optimized can be written as $\max_p \mathbb{E}_{x\sim X, t \sim T, l \sim L} \log p(y|A(p,x,l,t))$ where $y$ is the target label and $X$, $T$ and $L$ are te data space, the transformation space and the location space, respectively. The function $A$ takes as input the image and the patch and places the adversarial patch on the image according to the transformation and the location $t$ and $p$. Note that the adversarial patch is unconstrained (in contrast to general adversarial examples). In practice, the computed patch might look as illustrated in Figure 1. Figure 1: Illustration of the optimization procedure to obtain adversarial patches. Also find this summary at [](

Summary by David Stutz 5 days ago
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