MNIST

The experiment focuses on showing numerical properties of fake MNIST samples and features therein, unknown to the naked eye, which can be used to identify them as produced by a GAN. We start by comparing the distribution of features computed over the MNIST training set to other datasets, including the MNIST test set, samples generated with the Least-Squares GAN (LSGAN) and the Improved Wasserstein GAN (IWGAN), and adversarial samples computed using the Fast Gradient Sign Method (FGSM). The training data is scaled to [0, 1] and the random baseline is sampled from a Bernoulli distribution with probability equal to the mean value of pixel intensities in the MNIST training data, 0.13. Each GAN model is trained until the loss plateaus and ...

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