Title: NOVA3R: Non-pixel-aligned Visual Transformer for Amodal 3D Reconstruction
Primary area: applications to computer vision, audio, language, and other modalities
Keywords: Feed-forward 3D Reconstruction, Non-pixel-aligned 3D Reconstruction, 3D Completion

Abstract: We present NOVA3R, an effective approach for non-pixel-aligned 3D reconstruction from a set of unposed images, in a feed-forward manner. Unlike pixel-aligned methods that tie geometry to per-ray predictions, our formulation learns a global, view-agnostic scene representation that decouples reconstruction from pixel alignment. This addresses two key limitations in pixel-aligned 3D: (1) it recovers both visible and invisible regions with a complete scene representation, and (2) it produces physically plausible geometry with fewer duplicated structures in overlapping regions. To achieve this, we introduce a scene-token mechanism that aggregates information across unposed images and a diffusion-based 3D decoder that reconstructs complete, non-pixel-aligned point clouds. Extensive experiments on both scene-level and object-level datasets demonstrate that \method~outperforms state-of-the-art methods in terms of reconstruction accuracy and completeness.