NoPo-Avatar: Generalizable and Animatable Avatars from Sparse Inputs without Human Poses

Jing Wen, Alex Schwing, Shenlong Wang

Keywords: Human modeling; generalizable rendering

Abstract:

We tackle the task of recovering an animatable 3D human avatar from a single or a sparse set of images. For this task, beyond a set of images, many prior state-of-the-art methods use accurate “ground-truth” camera poses and human poses as input to guide reconstruction at test-time. We show that pose‑dependent reconstruction degrades results significantly if pose estimates are noisy.
To overcome this, we introduce NoPo-Avatar, which reconstructs avatars solely from images, without any pose input.
By removing the dependence of test-time reconstruction on human poses, NoPo-Avatar is not affected by noisy human pose estimates, making it more widely applicable. Experiments on challenging THuman2.0, XHuman, and HuGe100K data show that NoPo-Avatar outperforms existing baselines in practical settings (without ground‑truth poses) and delivers comparable results in lab settings (with ground‑truth poses).

Primary Area: Applications (e.g., vision, language, speech and audio, Creative AI)

Submission Number: 2072