FreeSplatter: Pose-free Gaussian Splatting for Sparse-view 3D Reconstruction

Sparse-view reconstruction models typically require precise camera poses, yet obtaining these parameters from sparse-view images remains challenging. We introduce \textbf{FreeSplatter}, a scalable feed-forward framework that generates high-quality 3D Gaussians from \textbf{uncalibrated} sparse-view images while estimating camera parameters within seconds. Our approach employs a streamlined transformer architecture where self-attention blocks facilitate information exchange among multi-view image tokens, decoding them into pixel-aligned 3D Gaussian primitives within a unified reference frame. This representation enables both high-fidelity 3D modeling and efficient camera parameter estimation using off-the-shelf solvers. We develop two specialized variants--for \textbf{object-centric} and \textbf{scene-level} reconstruction--trained on comprehensive datasets. Remarkably, FreeSplatter outperforms existing pose-dependent Large Reconstruction Models (LRMs) by a notable margin while achieving comparable or even better pose estimation accuracy compared to state-of-the-art pose-free reconstruction approach MASt3R in challenging benchmarks. Beyond technical benchmarks, FreeSplatter streamlines text/image-to-3D content creation pipelines, eliminating the complexity of camera pose management while delivering exceptional visual fidelity.