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A Generalized Analytic for the Detection of Synthetic Media

Descriptive Note:

[Technical Report, Master's Thesis]

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Convolutional neural networks CNNs and generative adversarial networks GANs have quickly become leading tools for the creation of convincing synthetic images. Such images increase the difficulty of discerning fact from fiction in the information space, where such challenges can degrade the quality and timeliness of decision-making. To compete, we must develop tools that can automatically detect artificially generated images. A major challenge in this area centers around the high number of unique image generation methods. We therefore seek a classification analytic that can successfully generalize when tested on images from multiple image generation algorithms. The 2020 paper CNN-Generated Images Are Surprisingly Easy to Spot... For Now by Wang et al. proposes such an approach. The study conducted here independently tests and validates this analytic in a variety of use cases. We begin by focusing on the reproducibility of the analytic using both publicly released and retrained models, the performance of the analytic on a dataset of images where generator type is unknown, and the analytics effectiveness in the detection of traditional deepfakes. We also examine the analytics robustness in response to reductions in image quality via compression and adversarial perturbations. Finally, we attempt to improve the analytics performance by using a state-of-the-art generator to produce a new image training set.


Subject Categories:

  • Optics
  • Cybernetics

Distribution Statement:

[A, Approved For Public Release]