2d-to-3d 2 3d-perception 2 3d-scene-understanding 2 artificial-intelligence 2 autonomous-driving 2 autonomous-vehicles 2 computer-vision 2 deep-learning 2 machine-learning 2 occupancy-grid-map 2 semantic-scene-completion 2 semantickitti 2 vision-transformer 2 voxel-proceessing 2