Abstract
Estimating the 3-D human body shape and pose under clothing is important for many applications, including virtual try-on, noncontact body measurement, and avatar creation for virtual reality. Existing body shape estimation methods formulate this task as an optimization problem by fitting a parametric body model to a single dressed-human scan or a sequence of dressed-human meshes for a better accuracy. This is impractical for many applications that require fast acquisition, such as gaming and virtual try-on due to the expensive computation. In this article, we propose the first learning-based approach to estimate the human body shape under clothing from a single dressed-human scan, dubbed Body PointNet. The proposed Body PointNet operates directly on raw point clouds and predicts the undressed body in a coarse-to-fine manner. Due to the nature of the data—aligned paired dressed scans and undressed bodies; and genus-0 manifold meshes (i.e., single-layer surfaces)—we face a major challenge of lacking training data. To address this challenge, we propose a novel method to synthesize the dressed-human pseudoscans and corresponding ground truth bodies. A new large-scale dataset, dubbed body under virtual garments, is presented, employed for the learning task of body shape estimation from 3-D dressed-human scans. Comprehensive evaluations show that the proposed Body PointNet outperforms the state-of-the-art methods in terms of both accuracy and running time.
Pengpeng Hu
Senior Lecturer (Associate Professor)
Pengpeng Hu is currently a Senior Lecturer (Associate Professor) with The University of Manchester. His research interests include biometrics, geometric deep learning, 3D human body reconstruction, point cloud processing, and vision-based measurement. He serves as an Associate Editor for IEEE Transactions on Neural Networks and Learning Systems, IEEE Transactions on Automation Science and Engineering, and Engineering and Mathematics in Medical and Life Sciences, as well as an Academic Editor for PLOS ONE and a member of the editorial board for Scientific Reports. He is also the Programme Chair for the 25th UK Workshop on Computational Intelligence (UKCI 2026) and an Area Chair for the 35th British Machine Vision Conference (BMVC 2024). He is the recipient of the Emerald Literati Award for an outstanding paper in 2019.