Modeling and prediction of human motion dynamics has long been a challenging
problem in computer vision, and most existing methods rely on the end-to-end
supervised training of various architectures of recurrent neural networks.
Inspired by the recent success of deep reinforcement learning methods, in this
paper we propose a new reinforcement learning formulation for the problem of
human pose prediction, and develop an imitation learning algorithm for
predicting future poses under this formulation through a combination of
behavioral cloning and generative adversarial imitation learning. Our
experiments show that our proposed method outperforms all existing
state-of-the-art baseline models by large margins on the task of human pose
prediction in both short-term predictions and long-term predictions, while also
enjoying huge advantage in training speed.

提出了一种新的基于增强学习的姿势预测模型，结合行为克隆和生成对抗学习，通过这种模型对未来的人体姿势进行预测，实验结果表明该模型在短期和长期预测方面优于现有方法。

人体姿态预测的模仿学习

Imitation Learning for Human Pose Prediction

Predicting and understanding human motion dynamics has many applications,
such as motion synthesis, augmented reality, security, and autonomous vehicles.
Due to the recent success of generative adversarial networks (GAN), there has
been much interest in probabilistic estimation and synthetic data generation
using deep neural network architectures and learning algorithms.
We propose a novel sequence-to-sequence model for probabilistic human motion
prediction, trained with a modified version of improved Wasserstein generative
adversarial networks (WGAN-GP), in which we use a custom loss function designed
for human motion prediction. Our model, which we call HP-GAN, learns a
probability density function of future human poses conditioned on previous
poses. It predicts multiple sequences of possible future human poses, each from
the same input sequence but a different vector z drawn from a random
distribution. Furthermore, to quantify the quality of the non-deterministic
predictions, we simultaneously train a motion-quality-assessment model that
learns the probability that a given skeleton sequence is a real human motion.
We test our algorithm on two of the largest skeleton datasets: NTURGB-D and
Human3.6M. We train our model on both single and multiple action types. Its
predictive power for long-term motion estimation is demonstrated by generating
multiple plausible futures of more than 30 frames from just 10 frames of input.
We show that most sequences generated from the same input have more than 50\%
probabilities of being judged as a real human sequence. We will release all the
code used in this paper to Github.

本文章提出了一种基于序列到序列模型的、名为 HP-GAN 的人体运动预测方法，用于深度神经网络建模和学习算法中的概率估计和合成数据生成任务；该方法利用改进的 Wasserstein GAN 和自定义损失函数进行训练，并进行了多种动作类型和数据集的测试，其预测能力的表现可通过只用 10 帧输入生成超过 30 帧的多个合理预测结果来体现。