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SiamRPN++: Evolution of Siamese Visual Tracking With Very Deep Networks

CVPR 2019 · Architectures and efficiency › CNN design · approach: Dense matching and estimation CNNs · 2,558 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Train with spatial-aware random translations to reduce center biasResNet-50 Siamese tracker · VOT2018EAO: 0.14Helped
Replace AlexNet with ResNet-50 (ablation)SiamRPN++ · VOT2018EAO: 0.332 -> 0.371Helped
Fine-tune the backbone (ablation)ResNet-50 Siamese tracker with L3–L5 and UP-XCorr · VOT2018EAO: 0.371 -> 0.390Helped
Replace UP-XCorr with DW-XCorr (ablation)ResNet-50 Siamese tracker with L3–L5 and fine-tuning · VOT2018EAO: 0.390 -> 0.414Helped
Aggregate features from L3, L4, and L5 rather than a single layer (ablation)ResNet-50 SiamRPN++ · VOT2018EAO: 4.0% higher than that of the single layer baselineHelped
Use only L5 instead of L4 (ablation)Fine-tuned ResNet-50 tracker with DW-XCorr · VOT2018EAO: 0.374 -> 0.320Hurt
Aggregate L4 and L5 features (ablation)Fine-tuned ResNet-50 tracker with DW-XCorr · VOT2018EAO: 0.374 -> 0.383Helped
Aggregate L3 and L4, or L3 and L5, rather than using L4 alone (ablation)Fine-tuned ResNet-50 tracker with DW-XCorr · VOT2018EAO: 0.374 -> 0.346; 0.374 -> 0.336Hurt
Replace UP-XCorr with DW-XCorr (ablation)AlexNet Siamese tracker · VOT2018EAO: 0.332 -> 0.355Helped
Increase backbone depth from AlexNet to ResNet-50 (ablation)SiamRPN++ · OTB2015AUC: 0.658 -> 0.696Helped
Use the deeper SiamRPN++ tracker instead of DaSiamRPNVisual tracking on OTB2015 · OTB2015overlap: 3.8%Helped
Use SiamRPN++ instead of DaSiamRPNVisual tracking on TrackingNet test · TrackingNet testAUC: 9.5%Helped

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