In this paper, we introduce a method to automatically reconstruct the 3D motion of a person interacting with an object from a single RGB video. Our method estimates the 3D poses of the person and the object, contact positions, and forces and torques actuated by the human limbs. The main contributions of this work are three-fold. First, we introduce an approach to jointly estimate the motion and the actuation forces of the person on the manipulated object by modeling contacts and the dynamics of their interactions. This is cast as a large-scale trajectory optimization problem. Second, we develop a method to automatically recognize from the input video the position and timing of contacts between the person and the object or the ground, thereby significantly simplifying the complexity of the optimization. Third, we validate our approach on a recent MoCap dataset with ground truth contact forces and demonstrate its performance on a new dataset of Internet videos showing people manipulating a variety of tools in unconstrained environments.

本文提出了一种从单个RGB视频自动重建与对象的人交互的3D运动的方法，估计人和物体的3D姿势，接触位置，被人类肢体激活的力和扭矩，方法主要集中在联合估计运动和动作力，运用大规模的轨迹优化问题，并且从输入视频自动识别出人与物体或地面之间的接触位置和时间，于真实数据集上验证了方法并展示了它在新的互联网视频数据集中的性能。

从单目视频中估计人-物交互的 3D 运动和力量