mark-dou/forensics

This is the official implementation of MIFAE-Forensics for DeepFake detection.

MIFAE-Forensics

This is the official implementation of MIFAE-Forensics for DeepFake detection.

Catalog

• Visualization demo.
• Pre-training code.
• Fine-tuning code.

Network Structure.

Two pretext tasks, i.e. facial region guided masking in the spatial domain and high-frequency components masking in the frequency domain.

Visualization Results.

1. Frequency Visualization

Original image -> High-frequency components masking -> Network prediction -> Full reconstruction

2. Spatial Visualization

• We first visualizae the MAE with facial region guiaded masking strategy in our paper.

Original image -> Facial region guided masking -> Network prediction -> Full reconstruction

• We also visualize the vanilla MAE reconstruction without facial region guided masking strategy as comparison.

Original image -> Random masking -> Network prediction -> Full reconstruction

3. DeepFake detection via the reconstruction discrepancy.

Usage

Pre-training instruction

To pre-train ViT-B/16 (recommended default) with multi-node distributed training, run the following on 8 nodes with 8 GPUs each:

python submitit_pretrain.py \
    --job_dir ${JOB_DIR} \
    --nodes 8 \
    --use_volta32 \
    --batch_size 64 \
    --model mae_vit_base_patch16 \
    --norm_pix_loss \
    --mask_ratio 0.75 \
    --mask_radius 16 \
    --epochs 800 \
    --warmup_epochs 40 \
    --blr 1.5e-4 --weight_decay 0.05 \
    --data_path ${IMAGENET_DIR}

Fine-tuning instruction

You can choose different reconstruction strategies through:

1. args.recon_real (reconstruction of real faces only),
2. args.recon_dual (positive reconstruction on real faces and negative construction on fake faces)
3. direct fine-tuning without reconstruction.

python partial_finetuning_with_reconstruction.py \
    --finetune ""\
    --decoder ""\
    --recon_real

Ackownledgement

This repository is built on MAE.