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Boundary IoU: Improving Object-Centric Image Segmentation Evaluation

CVPR 2021 · Detection and segmentation › CNN features · approach: Boundary-aware instance segmentation · 468 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use Boundary AP instead of Mask AP to evaluate low-resolution synthetic masksSynthetic 28×28 predictions on COCO val · COCO val synthetic 28×28AP_L: 95.0 -> 73.0Helped
Use Boundary PQ instead of Mask PQ for low-resolution predictionsSynthetic panoptic predictions on Cityscapes · Cityscapes val synthetic downscaling ratio 8SQ: 77.8 -> 58.6Helped
Use Boundary PQ instead of Mask PQSynthetic panoptic predictions on Cityscapes · Cityscapes val synthetic downscaling ratio 8RQ: 83.7 -> 80.2No clear effect
Increase PointRend output resolution from 28×28 to 224×224PointRend on COCO val · COCO valBoundary AP: 41.6 -> 42.1Helped
Add boundary supervision and higher-resolution mask-head featuresMask R-CNN on COCO val · COCO valBoundary AP: 36.1 -> 42.3Helped
Use 224×224 PointRend outputs rather than BMask R-CNN's 28×28 outputsPointRend and BMask R-CNN on COCO val · COCO val large objectsBoundary AP_L: 33.9 -> 34.4Helped
Use BMask R-CNN rather than PointRendInstance segmentation on COCO val · COCO val small objectsBoundary AP_S: 48.3 -> 48.7Helped
Replace Mask IoU with Boundary IoU in the evaluation measureLarge-object segmentation quality evaluation · COCO val synthetic 28×28AP_L: 95.0 -> 73.0Helped

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