SoPE: Spherical Coordinate-Based Positional Embedding for Enhancing Spatial Perception of 3D LVLMs

Researchers introduce SoPE (Spherical Coordinate-based Positional Embedding), a new method that enhances 3D Large Vision-Language Models by mapping point-cloud data into spherical coordinate space. This approach overcomes limitations of existing Rotary Position Embedding (RoPE) by better preserving spatial structures and directional variations in 3D multimodal understanding.