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Few Could Be Better Than All: Feature Sampling and Grouping for Scene Text Detection

CVPR 2022 · Detection and segmentation › CNN features · approach: Arbitrary-shape scene text detection · 109 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use feature sampling at all three scales (64+128+256 features) instead of sampling only at L0 or L0+L1 (ablation)Feature sampling and grouping detector · ICDAR 2015 testF-measure: 67.0 -> 89.1; 82.2 -> 89.1Helped
Use feature sampling at all three scales (64+128+256 features) instead of sampling only at L0 or L0+L1 (ablation)Feature sampling and grouping detector · MLT-2017 valF-measure: 63.9 -> 79.5; 73.4 -> 79.5Helped
Increase sampled features from 16+32+64 to 32+64+128 (ablation)Feature sampling and grouping detector · ICDAR 2015 testF-measure: 77.8 -> 86.0Helped
Increase sampled features from 32+64+128 to 64+128+256 (ablation)Feature sampling and grouping detector · ICDAR 2015 testF-measure: 86.0 -> 89.1Helped
Increase sampled features from 64+128+256 to 128+256+512 (ablation)Feature sampling and grouping detector · ICDAR 2015 testF-measure: 89.1 -> 89.0Hurt
Use adaptive sampling of 25% of foreground features (ablation)Feature sampling and grouping detector · ICDAR 2015 testF-measure: 89.1 -> 88.9No clear effect
Replace transformer grouping with fully connected layers (ablation)Feature sampling and grouping detector · ICDAR 2015 testF-measure: 89.1 -> 85.7Hurt
Replace transformer grouping with GCN (ablation)Feature sampling and grouping detector · MTWI testF-measure: 75.2 -> 72.5Hurt
Add constrained deformable pooling instead of average pooling (ablation)Feature sampling and grouping detector · ICDAR 2015 testF-measure: 88.3 -> 89.1Helped
Add constrained deformable pooling instead of standard deformable pooling (ablation)Feature sampling and grouping detector · MLT-2017 valF-measure: 79.2 -> 79.5Helped
Use scale-invariant GWD loss instead of original GWD loss (ablation)Feature sampling and grouping detector · ICDAR 2015 testF-measure: 88.4 -> 89.1Helped
Use scale-invariant GWD loss instead of original GWD loss (ablation)Feature sampling and grouping detector · MLT-2017 valF-measure: 79.0 -> 79.5Helped

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