Documents
Research Manuscript
MULTI-LABEL OBJECT CLASSIFICATION IN POINT CLOUDS USING GRAPH CONVOLUTIONAL NETWORK
- DOI:
- 10.60864/25nt-ph17
- Citation Author(s):
- Submitted by:
- Md. Nahid Hasan
- Last updated:
- 2 October 2026 - 2:38am
- Document Type:
- Research Manuscript
- Event:
- Presenters:
- Md. Nahid Hasan
- Paper Code:
- 2953
- Categories:
- Log in to post comments
Point clouds are a fundamental representation for 3D perception in robotics, autonomous systems, and augmented reality; however, despite progress in single-label classification, multi-label object recognition in point clouds—where multiple object categories inherently co-exist—remains underexplored. This paper proposes Multi-ContexPoint-GCN, a context-aware framework that formulates point cloud classification as a multi-label problem by employing Binary Cross-Entropy loss with sigmoid activation and integrating a Graph Convolutional Network (GCN) branch — chosen for its ability to exploit sparse, structured label co-occurrence through localized message passing over a data-driven label graph — to model inter-label dependencies arising from the physical layout constraints of indoor 3D scenes. Extensive experiments on the S3DIS and ScanNet datasets demonstrate the effectiveness and generalizability of the proposed approach across different backbone architectures. On S3DIS, the GCN branch improves mean Average Precision (mAP) by 3.18% with PointNet and by 1.39% with PointNet++, while on ScanNet, gains of 2.05% and 1.33% mAP are achieved using PointNet and PointNet++ backbones, respectively. These results confirm that explicitly modeling label correlations consistently enhances multi-label point cloud recognition, establishing a robust paradigm for context-aware 3D scene understanding.