Gaussian Splatting for Large‐Scale Aerial Scene Reconstruction From Ultra‐High‐Resolution Images
Qiulin Sun, Wei Lai, Yixian Li, Yanci Zhang · Computer Graphics Forum · 2025
Abstract Using 3D Gaussian splatting to reconstruct large‐scale aerial scenes from ultra‐high‐resolution images is still a challenge problem because of two memory bottlenecks ‐ excessive Gaussian primitives and the tensor sizes for ultra‐high‐resolution images. In this paper, we propose a task partitioning algorithm that operates in both object and image space to generate a set of small‐scale subtasks. Each subtask's memory footprints is strictly limited, enabling training on a single high‐end consumer‐grade GPU. More specifically, Gaussian primitives are clustered into blocks in object space, and the input images are partitioned into sub‐images according to the projected footprints of these blocks. This dual‐space partitioning significantly reduces training memory requirements. During subtask training, we propose a depth comparison method to generate a mask map for each sub‐image. This mask map isolates pixels primarily contributed by the Gaussian primitives of the current subtask, excluding all other pixels from training. Experimental results demonstrate that our method successfully achieves large‐scale aerial scene reconstruction using 9K resolution images on a single RTX 4090 GPU. The novel views synthesized by our method retain significantly more details than those from current state‐of‐the‐art methods.