Papers › Unite the People: Closing the Loop Between 3D and 2D Human Representations
Unite the People: Closing the Loop Between 3D and 2D Human Representations
Christoph Lassner, Javier Romero, Martin Kiefel, Federica Bogo, Michael J. Black, Peter V. Gehler
3D models provide a common ground for different representations of human bodies. In turn, robust 2D estimation has proven to be a powerful tool to obtain 3D fits "in-the- wild". However, depending on the level of detail, it can be hard to impossible to acquire labeled data for training 2D estimators on large scale. We propose a hybrid approach to this problem: with an extended version of the recently introduced SMPLify method, we obtain high quality 3D body model fits for multiple human pose datasets. Human annotators solely sort good and bad fits. This procedure leads to an initial dataset, UP-3D, with rich annotations. With a comprehensive set of experiments, we show how this data can be used to train discriminative models that produce results with an unprecedented level of detail: our models predict 31 segments and 91 landmark locations on the body. Using the 91 landmark pose estimator, we present state-of-the art results for 3D human pose and shape estimation using an order of magnitude less training data and without assumptions about gender or pose in the fitting procedure. We show that UP-3D can be enhanced with these improved fits to grow in quantity and quality, which makes the system deployable on large scale. The data, code and models are available for research purposes.
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Tasks
Datasets
Introduced by this paper, per the archive.
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| 3D Human Pose Estimation | HumanEva-I | SMPLify (dense) | Mean Reconstruction Error (mm) | 74.5 | #30 of 31 | Archive leaderboard | report |
| Monocular 3D Human Pose Estimation | Human3.6M | SMPLify (dense) | Frames Needed | 1 | #43 of 52 | Archive leaderboard | report |
| Monocular 3D Human Pose Estimation | Human3.6M | SMPLify (dense) | Need Ground Truth 2D Pose | No | #43 of 52 | Archive leaderboard | report |
| Monocular 3D Human Pose Estimation | Human3.6M | SMPLify (dense) | Use Video Sequence | No | #43 of 52 | Archive leaderboard | report |
| Monocular 3D Human Pose Estimation | Human3.6M | SMPLify (dense) | PA-MPJPE | 80.7 | #52 of 52 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
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