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Learning What Not To Segment: A New Perspective on Few-Shot Segmentation

CVPR 2022 · Label-efficient and robust learning › Zero-/few-shot and meta-learning · approach: Meta-learning analysis and benchmarks · 330 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Add a base-class learner and ensemble its predictions with the meta learnerBAM · PASCAL-5ᵢ, 1-shot, ResNet50mIoU: 65.40 -> 67.81Helped
Add a base-class learner and ensemble its predictions with the meta learnerBAM · COCO-20ᵢ, 1-shot, ResNet50mIoU: 43.09 -> 46.23Helped
Pre-train the base learner (ablation)PASCAL-5ᵢ 1-shot model · PASCAL-5ᵢ, 1-shot, VGG16mIoU: 57.61 -> 59.12Helped
Add the meta learner loss (ablation)PASCAL-5ᵢ 1-shot model · PASCAL-5ᵢ, 1-shot, VGG16mIoU: 59.12 -> 59.76Helped
Initialize ensemble weights specifically rather than randomly (ablation)BAM ensemble · PASCAL-5ᵢ, 1-shot, VGG16mIoU: 2.73% mIoU improvementsHelped
Add the scene-difference adjustment factor ψ (ablation)BAM ensemble · PASCAL-5ᵢ, 1-shot, VGG16mIoU: 62.49 -> 64.41Helped
Use adaptive support reweighting instead of alternative 5-shot fusion schemes (ablation)BAM · PASCAL-5ᵢ, 5-shot, VGG16mIoU: 64.41 -> 68.76; Mask-OR 65.15; Mask-Avg 65.92; Feature-Avg 66.83Helped
Replace pixel-wise support labels with bounding boxes (ablation)BAM · PASCAL-5ᵢ, 1-shot, VGG16mIoU: 64.41 -> 62.25Hurt
Replace pixel-wise support labels with bounding boxes (ablation)BAM · PASCAL-5ᵢ, 5-shot, VGG16mIoU: 68.76 -> 66.17Hurt
Add the ensemble module (ablation)BAM generalized FSS · PASCAL-5ᵢ generalized FSS, 1-shot, VGG16novel-class mIoU: 37.54 -> 43.19Helped
Add the ensemble module (ablation)BAM generalized FSS · PASCAL-5ᵢ generalized FSS, 1-shot, VGG16all-class mIoU: 59.65 -> 61.07Helped
Train the base and meta learners separately rather than jointly (ablation)BAM · PASCAL-5ᵢ, 1-shot, VGG16mIoUHelped

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