Mr Thomas Gittings

We present a novel method for generating robust adversarial image examples building upon the recent ‘deep image prior’ (DIP) that exploits convolutional network architectures to enforce plausible texture in image synthesis. Adversarial images are commonly generated by perturbing images to introduce high frequency noise that induces image misclassification, but that is fragile to subsequent digital manipulation of the image. We show that using DIP to reconstruct an image under adversarial constraint induces perturbations that are more robust to affine deformation, whilst remaining visually imperceptible. Furthermore we show that our DIP approach can also be adapted to produce local adversarial patches (‘adversarial stickers’). We demonstrate robust adversarial examples over a broad gamut of images and object classes drawn from the ImageNet dataset.