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Sequential Training of GANs Against GAN-Classifiers Reveals Correlated "Knowledge Gaps" Present Among Independently Trained GAN Instances

CVPR 2023 · Image generation › GANs · approach: Stabilized GAN training · 1 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Train SG2 to fool one ResNet-50 classifierStyleGAN2 on FFHQ · FFHQ, unseen ResNet-50 classifiersaccuracy on generated images: 0.993±0.002 -> 0.05±0.02Helped
Train SG2 to fool an Inception-v3 classifierStyleGAN2 on FFHQ · FFHQ, unseen Inception-v3 classifiersaccuracy on generated images: 0.16±0.26Helped
Train SG2 to fool one MobileNetV2 instanceStyleGAN2 on FFHQ · FFHQ, unseen MobileNetV2 classifiersaccuracy on generated images: 0.41±0.38Mixed
Train SG2 to fool multiple MobileNetV2 instances instead of one (ablation)StyleGAN2 on FFHQ · FFHQ, unseen MobileNetV2 classifiersaccuracy on generated images: 0.98 -> 0.04Helped
Add the classifier-augmented fool-all loss across sequential roundsStyleGAN2 on FFHQ · FFHQ, FID across iterations 0–4FID: 36.98, 36.62, 36.67, 36.39, 36.83No clear effect
Train later-iteration generators to fool classifiers from preceding iterationsStyleGAN2 on FFHQ · FFHQ, classifiers tested on later-iteration generatorsaccuracy: 0.993±0.002 -> 0.028±0.004Hurt
Use the memoryless loss, fooling only the immediately preceding classifier (ablation)StyleGAN2 on FFHQ · FFHQ, classifiers from two iterations earlierdetectabilityMixed
Train a DCGAN to fool a classifierDCGAN on MNIST · MNIST, held-out classifiers and image qualityfooling abilityMixed
Use truncated samples from one SG2 generator to train the classifier (ablation)StyleGAN2 on FFHQ · FFHQ, truncated samples from an independent generatorclassification accuracyHelped
Apply truncation with ψ=0.5 (ablation)StyleGAN2 on FFHQ · FFHQFID: ~37 -> ~81Hurt
Change the GAN-classifier architecture (ablation)StyleGAN2 on FFHQ · FFHQ, cross-architecture classifier generalizationaccuracy on generated images: 0.05±0.02; 0.74±0.12; 0.5±0.39Mixed
Finetune an iteration 0 GAN against a pre-trained detector instead of training from scratch (ablation)StyleGAN2 on FFHQ · FFHQ, next-iteration artifact behaviordetector behaviorNo clear effect

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