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SMPL: A Skinned Multi-Person Linear Model

Loper, Matthew, Mahmood, Naureen, Romero, Javier, Pons-Moll, Gerard, Black, Michael J.·2023·Seminal Graphics Papers: Pushing the Boundaries, Volume 2

Abstract

We present a learned model of human body shape and posedependent shape variation that is more accurate than previous models and is compatible with existing graphics pipelines. Our Skinned Multi-Person Linear model (SMPL) is a skinned vertexbased model that accurately represents a wide variety of body shapes in natural human poses. The parameters of the model are learned from data including the rest pose template, blend weights, pose-dependent blend shapes, identity-dependent blend shapes, and a regressor from vertices to joint locations. Unlike previous models, the pose-dependent blend shapes are a linear function of the elements of the pose rotation matrices. This simple formulation enables training the entire model from a relatively large number of aligned 3D meshes of different people in different poses. We quantitatively evaluate variants of SMPL using linear or dual-quaternion blend skinning and show that both are more accurate than a Blend- SCAPE model trained on the same data. We also extend SMPL to realistically model dynamic soft-tissue deformations. Because it is based on blend skinning, SMPL is compatible with existing rendering engines and we make it available for research purposes.

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Metadata

Authors
Loper, M., Mahmood, N., Romero, J., Pons-Moll, G., & Black, M. J.
Venue
Seminal Graphics Papers: Pushing the Boundaries, Volume 2
Publisher
ACM
Published
2023-08
Pages
851-866
OpenAlex
W4385489997
Cited by
768
References
20
FWCI
587.39
Type
book chapter
Language
en
Open access
closed

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CoChat. (2026). Citation check: SMPL: A Skinned Multi-Person Linear Model. https://app.cochat.ai/papers/10.1145/3596711.3596800
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Loper, M., Mahmood, N., Romero, J., Pons-Moll, G., & Black, M. J. (2023). SMPL: A Skinned Multi-Person Linear Model. Seminal Graphics Papers: Pushing the Boundaries, Volume 2. https://doi.org/10.1145/3596711.3596800

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Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.