GauU-Scene V2: Assessing the Reliability of Image-Based Metrics with Expansive Lidar Image Dataset Using 3DGS and NeRF

We introduce a novel, multimodal large-scale scene reconstruction benchmark that utilizes newly developed 3D representation approaches: Gaussian Splatting and Neural Radiance Fields (NeRF). Our expansive U-Scene dataset surpasses any previously existing real large-scale outdoor LiDAR and image dataset in both area and point count. GauU-Scene encompasses over 6.5 square kilometers and features a comprehensive RGB dataset coupled with LiDAR ground truth. Additionally, we are the first to propose a LiDAR and image alignment method for a drone-based dataset. Our assessment of GauU-Scene includes a detailed analysis across various novel viewpoints, employing image-based metrics such as SSIM, LPIPS, and PSNR on NeRF and Gaussian Splatting based methods. This analysis reveals contradictory results when applying geometric-based metrics like Chamfer distance. The experimental results on our multimodal dataset highlight the unreliability of current image-based metrics and reveal significant drawbacks in geometric reconstruction using the current Gaussian Splatting-based method, further illustrating the necessity of our dataset for assessing geometry reconstruction tasks. We also provide detailed supplementary information on data collection protocols and make the dataset available on the following anonymous project page

GauU-Scene V2: Expanse Lidar Image Dataset Shows Unreliable Geometric Reconstruction Using Gaussian Splatting and NeRF

We introduce a novel large-scale scene reconstruction benchmark that utilizes newly developed 3D representation approaches: Gaussian Splatting and Neural Radiance Fields, on our expansive GauU-Scene V2 dataset. GauU-Scene V2 encompasses over 6.5 square kilometers and features a comprehensive RGB dataset coupled with LiDAR ground truth. This dataset offers a unique blend of urban and academic environments for advanced spatial analysis, covering more than 6.5 km2. We also provide detailed supplementary information on data collection protocols. Furthermore, we present an easy-to-follow pipeline to align the COLMAP sparse point cloud with the detailed LiDAR dataset. Our evaluation of U-Scene, which includes a detailed analysis across various novel viewpoints using image-based metrics such as SSIM, LPIPS, and PSNR, shows contradictory results when applying geometric-based metrics, such as Chamfer distance. This leads to doubts about the reliability of current image-based measurement matrices and geometric extraction methods on Gaussian Splatting. We also make the dataset available on the following anonymous project page

GauU-Scene: A Scene Reconstruction Benchmark on Large Scale 3D Reconstruction Dataset Using Gaussian Splatting

We introduce a novel large-scale scene reconstruction benchmark using the newly developed 3D representation approach, Gaussian Splatting, on our expansive U-Scene dataset. U-Scene encompasses over one and a half square kilometres, featuring a comprehensive RGB dataset coupled with LiDAR ground truth. For data acquisition, we employed the Matrix 300 drone equipped with the high-accuracy Zenmuse L1 LiDAR, enabling precise rooftop data collection. This dataset, offers a unique blend of urban and academic environments for advanced spatial analysis convers more than 1.5 km$^2$. Our evaluation of U-Scene with Gaussian Splatting includes a detailed analysis across various novel viewpoints. We also juxtapose these results with those derived from our accurate point cloud dataset, highlighting significant differences that underscore the importance of combine multi-modal information