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LEGO: lifting-free exocentric-to-egocentric video generation

AI summary

An arXiv paper proposes LEGO, a method that generates egocentric video from a single exocentric recording without depth estimation, point-cloud lifting or reprojection. Instead, an LVSM-style transformer view synthesizer is fine-tuned to render the egocentric view directly, resolving cross-view correspondence internally; its probabilistic mapping averages each region over candidate source locations, which preserves structure but softens fine texture. The authors argue this trade-off suits a diffusion generator that restores detail during denoising, and that the concentration of the correspondence distribution also yields a per-region confidence used to mask low-confidence areas and guide early layout-forming steps. They report it consistently outperforms the explicit state-of-the-art pipeline and generalizes to other datasets without retraining.

In-depth insight

It sketches a simpler route to cross-view video generation that avoids explicit 3D reconstruction steps.

Computer Science > Computer Vision and Pattern Recognition

arXiv:2610.12442 (cs)

[Submitted on 8 Oct 2026]

Title:LEGO: A Lifting-Free Approach for Exocentric-to-Egocentric Video Generation

Authors:Suhwan Cho, Yonwoo Choi, Soongjin Kim, Jicheol Park, Taegyu Lim

View a PDF of the paper titled LEGO: A Lifting-Free Approach for Exocentric-to-Egocentric Video Generation, by Suhwan Cho and 4 other authors

#LEGO

Original · 3 min readRead the original
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