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Generalizable Pedestrian Detection: The Elephant in the Room

CVPR 2021 · Detection and segmentation › Open-set and few-shot detection · approach: Open-set and unknown object detection · 137 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use a general object detector rather than the pedestrian-specific BGCNet designCascade R-CNN vs BGCNet with HRNet · Caltech→CityPersonslog-average miss rate: 41.4 -> 36.5Helped
Use a general object detector rather than CSPCascade R-CNN vs CSP with HRNet · ECP→ECP Reasonablelog-average miss rate: 19.4 -> 6.9Helped
Use a general object detector rather than CSPCascade R-CNN vs CSP with HRNet · ECP→CityPersons Reasonablelog-average miss rate: 11.5 -> 10.9Helped
Replace the pedestrian-specific FRCNN adaptations with vanilla FRCNN (ablation)VGG-16 FRCNN · CityPersons→Caltechlog-average miss rate: 17.8 -> 17.6Helped
Pretrain Cascade R-CNN on CrowdHumanCascade R-CNN with HRNet · Caltech Reasonablelog-average miss rateHelped
Train on CrowdHuman rather than CityPersonsCascade R-CNN · ECP Reasonablelog-average miss rate: 6.9 -> 17.9Hurt
Progressively fine-tune from Wider Pedestrian to ECP instead of training on ECP alone (ablation)Cascade R-CNN with HRNet · CityPersons Reasonablelog-average miss rate: 10.9 -> 9.7Helped
Progressively fine-tune from CrowdHuman to ECP instead of training on ECP alone (ablation)Cascade R-CNN with HRNet · CityPersons Reasonablelog-average miss rate: 10.9 -> 10.3Helped
Progressively fine-tune on ECP after pretraining on Wider Pedestrian and CrowdHuman rather than merging all three datasets (ablation)Cascade R-CNN with HRNet · CityPersons Reasonablelog-average miss rate: 10.9 -> 9.7Helped
Use ECP alone rather than progressive pretraining on Wider Pedestrian followed by ECP (ablation)MobileNet Cascade R-CNN · CityPersons Reasonablelog-average miss rate: 11.4 -> 19.1Hurt
Progressively fine-tune from CrowdHuman to ECP (ablation)MobileNet Cascade R-CNN · CityPersons Reasonablelog-average miss rate: 12.0 -> 11.9Helped
Progressively fine-tune from Wider Pedestrian to ECP (ablation)MobileNet Cascade R-CNN · CityPersons Reasonablelog-average miss rate: 12.0 -> 11.4Helped

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