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Voxel Field Fusion for 3D Object Detection

CVPR 2022 · Detection and segmentation › 3D detection and driving · approach: Unified LiDAR 3D detection · 122 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Add voxel field fusionCenterPoint · nuScenes testmAP: 60.3 -> 68.4; 8.1% mAPHelped
Add voxel field fusionCenterPoint · nuScenes testNDS: 67.3 -> 72.4; 5.1% NDSHelped
Add voxel field fusionVoxel R-CNN · KITTI test, Car HardAP3D-R40: 77.06 -> 79.29; 2.2% APHelped
Use image-level flipping and rescaling aligned to point transformations rather than reproject alignment (ablation)PV-RCNN with single fusion · KITTI val, Car ModerateAP3D-R40: 82.50 -> 84.15Helped
Add the sample-added strategy to the mixed augmentor (ablation)PV-RCNN + VFF · KITTI val, Car ModerateAP3D-R40: 76.25 -> 82.53Helped
Add sample-static augmentation to sample-added augmentation (ablation)PV-RCNN + VFF · KITTI val, Car ModerateAP3D-R40: 82.53 -> 85.51Helped
Use learnable importance sampling instead of the strongest heuristic density sampling (ablation)PV-RCNN + VFF · KITTI val, Car ModerateAP3D-R40: 82.01 -> 82.10Helped
Extend local fusion to fusion along the whole ray (ablation)PV-RCNN + VFF · KITTI val, Car ModerateAP3D-R40: 82.12 -> 82.53Helped
Use Gaussian supervision with radius 1 instead of radius 0 without Gaussian supervision (ablation)PV-RCNN + VFF · KITTI val, Car ModerateAP3D-R40: 82.10 -> 82.53Helped
Expand Gaussian ray supervision radius from 1 to 2 (ablation)PV-RCNN + VFF · KITTI val, Car ModerateAP3D-R40: 82.53 -> 81.75Hurt
Apply fusion at Stage-1 rather than the no-fusion baseline (ablation)PV-RCNN · KITTI val, Car ModerateAP3D-R40: 79.19 -> 82.53; 3.34% APHelped
Move fusion from Stage-1 to Stage-3 (ablation)PV-RCNN · KITTI val, Car ModerateAP3D-R40: 82.53 -> 80.27Hurt

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