arXiv Machine Learning By Danil Davydov, Bader Rasheed, Dmitriy Vatolin

Does an Illumination Prior Help Face-Swap Detection? A Controlled Study of Temporal Self-Blended Images

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The study examines whether adding illumination inconsistencies to self-blended images—creating Temporal Self-Blended Images (T‑SBI)—enhances face‑swap detection. Across five training regimes and multiple datasets, no significant improvement in detection accuracy was observed; AUC differences stayed within seed variability. However, T‑SBI altered prediction score distributions, shifting optimal thresholds, and did improve robustness to heavy JPEG compression on the DFDC dataset, suggesting a reliance on low‑frequency cues.

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