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Perpetual Motion: Generating Unbounded Human Motion | | Yan Zhang
; Michael J. Black
; Siyu Tang
; | | Date: |
27 Jul 2020 | | Abstract: | The modeling of human motion using machine learning methods has been widely
studied. In essence it is a time-series modeling problem involving predicting
how a person will move in the future given how they moved in the past. Existing
methods, however, typically have a short time horizon, predicting a only few
frames to a few seconds of human motion. Here we focus on long-term prediction;
that is, generating long sequences (potentially infinite) of human motion that
is plausible. Furthermore, we do not rely on a long sequence of input motion
for conditioning, but rather, can predict how someone will move from as little
as a single pose. Such a model has many uses in graphics (video games and crowd
animation) and vision (as a prior for human motion estimation or for dataset
creation). To address this problem, we propose a model to generate
non-deterministic, extit{ever-changing}, perpetual human motion, in which the
global trajectory and the body pose are cross-conditioned. We introduce a novel
KL-divergence term with an implicit, unknown, prior. We train this using a
heavy-tailed function of the KL divergence of a white-noise Gaussian process,
allowing latent sequence temporal dependency. We perform systematic experiments
to verify its effectiveness and find that it is superior to baseline methods. | | Source: | arXiv, 2007.13886 | | Services: | Forum | Review | PDF | Favorites | |
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