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Pre-Trained Image Processing Transformer

CVPR 2021 · Image generation › Autoregressive and latent generation · approach: Classical generative image synthesis · 2,102 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
add contrastive learning with λ=0.1 (ablation)IPT · Set4, ×2 super-resolutionPSNR: 38.27 -> 38.37Helped
set contrastive-loss weight to λ=0.05 rather than λ=0 (ablation)IPT · Set4, ×2 super-resolutionPSNR: 38.27 -> 38.32Helped
set contrastive-loss weight to λ=0.2 rather than λ=0 (ablation)IPT · Set4, ×2 super-resolutionPSNR: 38.27 -> 38.33Helped
set contrastive-loss weight to λ=0.5 rather than λ=0 (ablation)IPT · Set4, ×2 super-resolutionPSNR: 38.27 -> 38.26Hurt
use learnable position embeddings instead of fixed or no position embeddings (ablation)IPT · Image processing tasksPSNR: 0.2dB to 0.3dBHelped
add task embeddings (ablation)IPT · Image processing tasksaccuracy: 0.1dB to 0.5dBHelped
use multi-task pre-training rather than single-task pre-training (ablation)IPT · Pre-trained tasks and transfer to other tasksPSNR: about 0.3dBMixed
increase synthesized ImageNet pre-training data to a large-scale fraction (ablation)Transformer-based IPT versus CNN models · Image processing tasksperformanceHelped

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