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Research map / Detection and segmentation / Open-set and few-shot detection

Expecting the Unexpected: Training Detectors for Unusual Pedestrians With Adversarial Imposters

CVPR 2017 · Detection and segmentation › Open-set and few-shot detection · approach: Open-set and unknown object detection · 50 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Add adversarial imposters during adaptation, then fine-tune on real target images (ablation)RPN+ pretrained on synthetic data · Precarious test, 50% overlapmiss rate: 48.45% -> 42.47%Helped
Add adversarial imposters during adaptation (ablation)RPN+ pretrained on synthetic data and adapted on T · Precarious test, 50% overlapmiss rate: 48.45% -> 45.97%Helped
Fine-tune on real target images after adaptation on T ∪ I (ablation)RPN+ pretrained on synthetic data · Precarious test, 50% overlapmiss rate: 45.97% -> 42.47%Helped
Add adversarial imposters and final real-target fine-tuning (ablation)RPN+ pretrained on synthetic data · Precarious test, 70% overlapmiss rate: 77.14% -> 73.70%Helped
Fine-tune on real target images after adaptation on T ∪ I (ablation)RPN+ pretrained on synthetic data · Precarious test, 70% overlapmiss rate: 74.94% -> 73.70%Helped
Use synthetic data only instead of real-target adaptation (ablation)RPN+ · Precarious test, 50% overlapmiss rate: 83.49% vs 42.47%Hurt
Use target data only instead of synthetic pretraining and imposter adaptation (ablation)RPN+ · Precarious test, 50% overlapmiss rate: 72.39% vs 42.47%Hurt
Set the imposter set size roughly equal to the 500 target training samples (ablation)Adversarial imposter training pipeline · Precarious testmiss rateHelped
Use a better-trained real-versus-synthetic discriminator to select imposters (ablation)Adversarial imposter training pipeline · Precarious testmiss rateHelped

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