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Real-time Multi-Plane Segmentation Based on GPU Accelerated High-Resolution 3D Voxel Mapping for Legged Robot Locomotion

This paper proposes a real-time multi-plane segmentation method based on GPU-accelerated high-resolution 3D voxel mapping for legged robot locomotion. Existing online planar mapping approaches struggle to balance accuracy and computational efficiency: direct depth image segmentation from specific sensors suffers from poor temporal integration, height map-based methods cannot represent complex 3D structures like overhangs, and voxel-based plane segmentation remains unexplored for real-time applications. To address these limitations, we develop a novel framework that integrates vertex-based connected component labeling with random sample consensus based plane detection and convex hull, leveraging GPU parallel computing to rapidly extract planar regions from point clouds accumulated in high-resolution 3D voxel maps. Experimental results demonstrate that the proposed method achieves fast and accurate 3D multi-plane segmentation at over 30 Hz update rate even at a resolution of 0.01 m, enabling the detected planes to be utilized in real time for locomotion tasks. Furthermore, we validate the effectiveness of our approach through experiments in both simulated environments and physical legged robot platforms, confirming robust locomotion performance when considering 3D planar structures.

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