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Auflistung nach Schlagwort "Deepfake"

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  • Konferenzbeitrag
    A Generalizable Deepfake Detector based on Neural Conditional Distribution Modelling
    (BIOSIG 2020 - Proceedings of the 19th International Conference of the Biometrics Special Interest Group, 2020) Khodabakhsh, Ali; Busch, Christoph
    Photo- and video-realistic generation techniques have become a reality following the advent of deep neural networks. Consequently, there are immense concerns regarding the difficulty in differentiating what content is real from what is synthetic. An example of video-realistic generation techniques is the infamous Deepfakes, which exploit the main modality by which humans identify each other. Deepfakes are a category of synthetic face generation methods and are commonly based on generative adversarial networks. In this article, we propose a novel two-step synthetic face image detection method in which general-purpose features are extracted in a first step, trivializing the task of detecting synthetic images. The anomaly detector predicts the conditional probabilities for observing every individual pixel in the image and is trained on pristine data only. The extracted anomaly features demonstrate true generalization capacity across widely different unknown synthesis methods while showing a minimal loss in performance with regard to the detection of known synthetic samples.
  • Magazinartikel
    Wenn aus Worten Bilder werden
    (.inf: Vol. 1, No. 1, 2023) Steinebach, Martin
    Ein paar Begriffe eintippen, kurz warten und schon entsteht ein Bild, das nie eine Kamera aufgenommen hat: Text-to-Image-Verfahren stellen die Mediensicherheit vor neue Herausforderungen. Ein Bildforensiker erklärt, was die neue Technologie kann und was - noch - nicht.