ACT-R: Adaptive Camera Trajectories for Single View 3D Reconstruction

Yizhi Wang, Mingrui Zhao, Hao Zhang

Keywords: 3D reconstruction, path planning

TL;DR: An adaptive camera trajectory that better generates multiviews for 3D reconstruction.

Abstract:

We introduce the simple idea of adaptive view planning to multi-view synthesis, aiming to improve both occlusion revelation
and 3D consistency for single-view 3D reconstruction. Instead of producing an unordered set of views independently or simultaneously, we
generate a sequence of views, leveraging temporal consistency to enhance 3D coherence. Importantly, our view sequence is not determined by a pre-determined and fixed camera setup. Instead, we compute an adaptive camera trajectory (ACT), to maximize the visibility of occluded regions of the 3D object to be reconstructed. Once the best orbit is found, we feed it to a video diffusion model to generate novel views around the orbit, which can then be passed to any multi-view 3D reconstruction model to obtain the final result. Our multi-view synthesis pipeline is quite efficient since it involves no run-time training/optimization, only forward inferences by applying pre-trained models for occlusion analysis and multi-view synthesis. Our method predicts camera trajectories that reveal occlusions effectively and produce consistent novel views, significantly improving 3D reconstruction over SOTA alternatives on the unseen GSO dataset.

Submission Number: 371