EX-4D

What it does

EX-4D is an open-source framework by Pico/Bytedance that turns a single video into a camera-controllable 4D experience. Its novel Depth Watertight Mesh ensures consistency even at extreme viewpoints.

Generating high-quality camera-controllable videos from monocular input is challenging, particularly under extreme viewpoints. Existing methods often struggle with geometric inconsistencies and occlusion artifacts. We introduce EX-4D , a novel framework that addresses these challenges through a Depth Watertight Mesh representation that explicitly models both visible and occluded regions, ensuring geometric consistency even in extreme camera poses. Our approach includes a simulated masking strategy that generates effective training data from monocular videos, eliminating the need for paired multi-view datasets. A lightweight LoRA-based video diffusion adapter synthesizes high-quality,…from tau-yihouxiang.github.io

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