Do You Guys Want to Dance: Zero-Shot Compositional Human Dance
  Generation with Multiple Persons
Zhe Xu Kun Wei Xu Yang Cheng Deng
Human dance generation (HDG) aims to synthesize realistic videos from images
and sequences of driving poses. Despite great success, existing methods are
limited to generating videos of a single person with specific backgrounds,
while the generalizability for real-world scenarios with multiple persons and
complex backgrounds remains unclear. To systematically measure the
generalizability of HDG models, we introduce a new task, dataset, and
evaluation protocol of compositional human dance generation (cHDG). Evaluating
the state-of-the-art methods on cHDG, we empirically find that they fail to
generalize to real-world scenarios. To tackle the issue, we propose a novel
zero-shot framework, dubbed MultiDance-Zero, that can synthesize videos
consistent with arbitrary multiple persons and background while precisely
following the driving poses. Specifically, in contrast to straightforward DDIM
or null-text inversion, we first present a pose-aware inversion method to
obtain the noisy latent code and initialization text embeddings, which can
accurately reconstruct the composed reference image. Since directly generating
videos from them will lead to severe appearance inconsistency, we propose a
compositional augmentation strategy to generate augmented images and utilize
them to optimize a set of generalizable text embeddings. In addition,
consistency-guided sampling is elaborated to encourage the background and
keypoints of the estimated clean image at each reverse step to be close to
those of the reference image, further improving the temporal consistency of
generated videos. Extensive qualitative and quantitative results demonstrate
the effectiveness and superiority of our approach.