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.

介绍一种使用混合方法，利用人工判断区分出好和坏的 3D 拟合方法，构建了一个多维度的人体姿态数据集 UP-3D，用于训练区分模型，获得了 31 个部位和 91 个标记点的 3D 人体姿态模型，其训练数据量比现有技术减小一个数量级，并且不需要关于性别或姿态方面的先验知识。