A pose-conditioned large-margin contrastive encoder isolates persistent biometric identity cues from transmitted latents in talking-head videoconferencing to flag impersonation attacks via cosine similarity without inspecting the output video.
Cosface: Large margin cosine loss for deep face recognition
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KappaPlace learns hyperspherical uncertainty for VPR via prototype-anchored supervision on vMF distributions, cutting expected calibration error by up to 50% while preserving retrieval performance.
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Unmasking Puppeteers: Leveraging Biometric Leakage to Expose Impersonation in AI-Based Videoconferencing
A pose-conditioned large-margin contrastive encoder isolates persistent biometric identity cues from transmitted latents in talking-head videoconferencing to flag impersonation attacks via cosine similarity without inspecting the output video.
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KappaPlace: Learning Hyperspherical Uncertainty for Visual Place Recognition via Prototype-Anchored Supervision
KappaPlace learns hyperspherical uncertainty for VPR via prototype-anchored supervision on vMF distributions, cutting expected calibration error by up to 50% while preserving retrieval performance.