In this work, we introduce the Geometry-Aware Large Reconstruction Model (GeoLRM), an approach which can predict high-quality assets with 512k Gaussians and 21 input images in only 11 GB GPU memory. Previous works neglect the inherent sparsity of 3D structure and do not utilize explicit geometric relationships between 3D and 2D images. This limits these methods to a low-resolution representation and makes it difficult to scale up to the dense views for better quality. GeoLRM tackles these issues by incorporating a novel 3D-aware transformer structure that directly processes 3D points and uses deformable cross-attention mechanisms to effectively integrate image features into 3D representations. We implement this solution through a two-stage pipeline: initially, a lightweight proposal network generates a sparse set of 3D anchor points from the posed image inputs; subsequently, a specialized reconstruction transformer refines the geometry and retrieves textural details. Extensive experimental results demonstrate that GeoLRM significantly outperforms existing models, especially for dense view inputs. We also demonstrate the practical applicability of our model with 3D generation tasks, showcasing its versatility and potential for broader adoption in real-world applications.

该研究介绍了一种名为几何感知大型重建模型（GeoLRM）的方法，该方法可以使用512k个高斯函数和21个输入图像在仅需11 GB的GPU内存中预测高质量的资源。该模型通过引入一种新颖的三维感知变换器结构和可变形交叉注意机制来解决现有方法在表达低分辨率和提高质量的密集视图方面的局限性，实现了三维结构和二维图像之间的有效融合，并在三维生成任务中表现出显著的性能优势。

GeoLRM：几何感知大规模重建模型用于高质量三维高斯生成