Title: EgoWorld: Translating Exocentric View to Egocentric View using Rich Exocentric Observations
Primary area: applications to computer vision, audio, language, and other modalities
Keywords: Egocentric Vision, Diffusion Models

Abstract: Egocentric vision is essential for both human and machine visual understanding, particularly in capturing the detailed hand-object interactions needed for manipulation tasks. Translating third-person views into first-person views significantly benefits augmented reality (AR), virtual reality (VR) and robotics applications. However, current exocentric-to-egocentric translation methods are limited by their dependence on 2D cues, synchronized multi-view settings, and unrealistic assumptions such as the necessity of an initial egocentric frame and relative camera poses during inference.  To overcome these challenges, we introduce EgoWorld, a novel two-stage framework that reconstructs an egocentric view from rich exocentric observations, including projected point clouds, 3D hand poses, and textual descriptions. Our approach reconstructs a point cloud from estimated exocentric depth maps, reprojects it into the egocentric perspective, and then applies diffusion-based inpainting to produce dense, semantically coherent egocentric images. Evaluated on 4 datasets (i.e., H2O, TACO, Assembly101, and Ego-Exo4D), EgoWorld achieves state-of-the-art performance and demonstrates robust generalization to new objects, actions, scenes, and subjects.  Moreover, EgoWorld exhibits robustness on in-the-wild examples, underscoring its practical applicability.

TL;DR: We introduce EgoWorld, a novel framework that reconstructs egocentric world from rich exocentric observations, including projected point clouds, 3D hand poses, and textual descriptions.