Modern 3D human pose estimation techniques rely on deep networks, which require large amounts of training data. While weakly-supervised methods require less supervision, by utilizing 2D poses or multi-view imagery without annotations, they still need a sufficiently large set of samples with 3D annotations for learning to succeed. In this paper, we propose to overcome this problem by learning a geometry-aware body representation from multi-view images without annotations. To this end, we use an encoder-decoder that predicts an image from one viewpoint given an image from another viewpoint. Because this representation encodes 3D geometry, using it in a semi-supervised setting makes it easier to learn a mapping from it to 3D human pose. As evidenced by our experiments, our approach significantly outperforms fully-supervised methods given the same amount of labeled data, and improves over other semi-supervised methods while using as little as 1% of the labeled data.

本文提出使用多视角图像而无需注释，来学习一个具有几何感知能力的身体表示，通过使用该身体表示，我们的方法在仅使用少量标记数据的情况下，显著优于完全监督的方法，并且在使用仅 1% 标记数据时，也优于其他半监督方法。

无监督几何感知表示用于三维人体姿态估计