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OneFormer3D: One Transformer for Unified Point Cloud Segmentation

2023/11/24 by Maxim Kolodiazhnyi, Kolodiazhnyi, Maxim, Анна Воронцова +5 · 17 citations
Engineering · Environmental Science · Computer Science · #3D Shape Modeling and Analysis #Remote Sensing and LiDAR Applications #Advanced Neural Network Applications

paper · pdf · doi:10.48550/arxiv.2311.14405

Abstract

Semantic, instance, and panoptic segmentation of 3D point clouds have been addressed using task-specific models of distinct design. Thereby, the similarity of all segmentation tasks and the implicit relationship between them have not been utilized effectively. This paper presents a unified, simple, and effective model addressing all these tasks jointly. The model, named OneFormer3D, performs instance and semantic segmentation consistently, using a group of learnable kernels, where each kernel is responsible for generating a mask for either an instance or a semantic category. These kernels are trained with a transformer-based decoder with unified instance and semantic queries passed as an input. Such a design enables training a model end-to-end in a single run, so that it achieves top performance on all three segmentation tasks simultaneously. Specifically, our OneFormer3D ranks 1st and sets a new state-of-the-art (+2.1 mAP50) in the ScanNet test leaderboard. We also demonstrate the state-of-the-art results in semantic, instance, and panoptic segmentation of ScanNet (+21 PQ), ScanNet200 (+3.8 mAP50), and S3DIS (+0.8 mIoU) datasets.

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