哈工大&理想PAGS：自驾闭环仿真新SOTA！

Core Viewpoint - The article discusses the advancements in 3D scene reconstruction for dynamic urban environments, emphasizing the introduction of the PAGS method, which addresses the inefficiencies in resource allocation by prioritizing semantic elements critical for driving safety [1][22]. Research Background and Core Issues - Dynamic large-scale urban environment 3D reconstruction is essential for autonomous driving systems, supporting simulation testing and digital twin applications [1]. - Existing methods face a bottleneck in resource allocation, failing to distinguish between critical elements (e.g., pedestrians, vehicles) and non-critical elements (e.g., distant buildings) [1]. - This leads to wasted computational resources on non-critical details while compromising the fidelity of critical object details [1]. Core Method Design - PAGS introduces a task-aware semantic priority embedded in the reconstruction and rendering process, consisting of three main modules: 1. Combination of Gaussian scene representation [4]. 2. Semantic-guided pruning [5]. 3. Priority-driven rendering pipeline [6]. Experimental Validation and Results Analysis - Experiments were conducted on the Waymo and KITTI datasets, measuring reconstruction fidelity and efficiency against mainstream methods [12]. - Quantitative results show that PAGS achieves a PSNR of 34.63 and an FPS of 353, significantly outperforming other methods in both fidelity and speed [17][22]. - The model size is 530 MB with a VRAM usage of 6.1 GB, making it suitable for in-vehicle hardware [17]. Conclusion - PAGS effectively breaks the inherent trade-off between fidelity and efficiency in dynamic driving scene 3D reconstruction through semantic-guided resource allocation and priority-driven rendering acceleration [22]. - The method ensures computational resources are focused on critical objects, enhancing rendering speed while maintaining high fidelity [23].