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Semi-Supervised Semantic Segmentation With Cross-Consistency Training

CVPR 2020 · Label-efficient and robust learning › Semi-supervised learning · approach: Consistency training for semi-supervised segmentation · 981 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Enforce prediction consistency across perturbed encoder representations using unlabeled examplesCCT · PASCAL VOC val, n=1000mIoU: CCT 58.6; baseline 51.4Helped
Add image-level labeled examples alongside pixel-level labelsCCT · PASCAL VOC valmIoU: 3.8 pointsHelped
Enforce consistency across domains with a shared encoderCCT · Cityscapes + CamVidaverage mIoU: 35.6 -> 44.4; 35.9 -> 47.9Helped
Enforce consistency across domains despite non-overlapping label spacesCCT · Cityscapes + SUN RGB-Daverage mIoU: 46.2 -> 52.1Helped
Apply input-level adversarial perturbations for consistency (ablation)PASCAL VOC semi-supervised segmentation · PASCAL VOC valmIoU: 51.4 -> 50.0; 59.2 -> 57.9Hurt
Use Mean Teachers consistency instead of cross-consistency on hidden representations (ablation)PASCAL VOC semi-supervised segmentation · PASCAL VOC valmIoU: 51.4 -> 51.3; 59.2 -> 59.4No clear effect
Replace MSE consistency distance with KL divergence (ablation)CCT · PASCAL VOC valmIoU: 58.6 -> 54.0; 64.4 -> 62.5Hurt
Replace MSE consistency distance with JS divergence (ablation)CCT · PASCAL VOC valmIoU: 58.6 -> 58.4; 64.4 -> 64.3No clear effect
Mask uncertain main predictions during unlabeled consistency training (ablation)CCT · PASCAL VOC valmIoU: 58.6 vs 58.4; 64.4 vs 63.3No clear effect
Add pairwise consistency loss between auxiliary predictions (ablation)CCT · PASCAL VOC valmIoU: 58.6 -> 55.6; 64.4 -> 61.2Hurt
Add adversarial domain-alignment loss (ablation)CCT · Cityscapes + CamVidaverage mIoU: 44.4 -> 42.2; 47.9 -> 45.2Hurt

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