A generative adversarial network (GAN) is a system composed of two neural networks: a generator and a discriminator. The discriminator takes a data instance as input, and classifies it as ‘Real’ or ‘Fake’ with respect to a training data set. The generator takes Gaussian noise and transforms it into a synthetic data sample with the goal of fooling the discriminator. The discriminator learns to classify samples as real or fake. The generator learns from errors in failed attempts at fooling the discriminator.
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