π§ πΈ️ Graph-SENet: Unsupervised Skeleton Extraction from Point Clouds
π Introduction
With the rapid growth of 3D sensing technologies such as LiDAR, RGB-D cameras, and laser scanners, point cloud data has become central to computer vision and geometric learning π. One of the key challenges is skeleton extraction—deriving a compact structural representation of complex 3D shapes π¦΄.
π What is Graph-SENet?
Graph-SENet is an unsupervised learning–based Graph Neural Network (GNN) designed to extract skeletal structures directly from raw point clouds π§©. Unlike supervised models, it does not require labeled skeleton data, making it scalable and cost-effective π.
π§ How It Works
Graph-SENet models point clouds as graphs πΈ️, where nodes represent points and edges capture local geometric relationships. Through graph convolution and structure-aware learning, the network identifies medial axes and topological connections while preserving shape integrity π.
π Key Features
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π Unsupervised Learning – No ground-truth skeletons required
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𧬠Topology Preservation – Maintains object structure and connectivity
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⚡ Efficient Representation – Reduces complex shapes to meaningful skeletons
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π Robust to Noise – Handles sparse and irregular point clouds
π§ͺ Applications
Graph-SENet has wide-ranging applications across domains:
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π€ Robotics & Motion Planning
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π₯ Medical Imaging (vascular and organ modeling)
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π️ 3D Reconstruction & CAD
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π Autonomous Driving & Scene Understanding
π Conclusion
By combining graph neural networks with unsupervised learning, Graph-SENet offers a powerful and flexible approach to skeleton extraction from point clouds π. It opens new pathways for efficient 3D shape analysis without the burden of labeled datasets ✨.
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