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Lips Don't Lie: A Generalisable and Robust Approach To Face Forgery Detection

CVPR 2021 · Video › Video segmentation and tracking · approach: Deepfake video detection · 501 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
use lipreading-pretrained features and finetune only the temporal networkLipForensics · FF++ HQ cross-manipulation averageAUC (%): 94.9 -> 97.1Helped
pretrain the detector on lipreading rather than training from scratch (ablation)LipForensics · FF++ cross-manipulationAUC (%): 86.7 -> 94.4; 86.7 -> 97.1Helped
freeze the feature extractor instead of finetuning the whole network (ablation)LipForensics · FF++ cross-manipulationAUC (%): 94.4 -> 97.1Helped
add the MS-TCN to model long-term temporal information (ablation)LipForensics · FaceShifter and DeeperForensicsVideo-level accuracy (%): 67.1 -> 83.2; 74.6 -> 84.6Helped
add short-term temporal modeling with ResNet-3D/2D (ablation)LipForensics · FaceShifterVideo-level accuracy (%): 59.3 -> 67.1Helped
add short-term temporal modeling with ResNet-3D/2D (ablation)LipForensics · DeeperForensicsVideo-level accuracy (%): 75.7 -> 74.6Hurt
pretrain on lipreading instead of other tested pretraining datasets (ablation)LipForensics · FaceShifter and DeeperForensicsVideo-level accuracy (%): Kinetics: 65.7 / 68.2; LRW: 83.2 / 84.6Helped
use frozen features rather than finetuning the whole network (ablation)LipForensics · FaceShifter and DeeperForensicsVideo-level accuracy (%): 83.2 -> 87.5; 84.6 -> 90.4Helped
use mouth crops instead of full-face crops with lipreading pretraining (ablation)LipForensics · FaceShifterVideo-level accuracy (%): 84.3 -> 87.5Helped
use mouth crops instead of full-face crops with lipreading pretraining (ablation)LipForensics · DeeperForensicsVideo-level accuracy (%): 90.0 -> 90.4Helped
train on more diverse forgery methods (ablation)LipForensics · FaceSwapAUC (%): 95.1Helped
increase the number of frames per clip (ablation)LipForensics · FaceShifter and DeeperForensicsVideo-level performanceHelped

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