Current training of motion style transfer systems relies on consistency losses across style domains to preserve contents, hindering its scalable application to a large number of domains and private data. Recent image transfer works show the potential of independent training on each domain by leveraging implicit bridging between diffusion models, with the content preservation, however, limited to simple data patterns. We address this by imposing biased sampling in backward diffusion while maintaining the domain independence in the training stage. We construct the bias from the source domain keyframes and apply them as the gradient of content constraints, yielding a framework with keyframe manifold constraint gradients (KMCGs). Our validation demonstrates the success of training separate models to transfer between as many as ten dance motion styles. Comprehensive experiments find a significant improvement in preserving motion contents in comparison to baseline and ablative diffusion-based style transfer models. In addition, we perform a human study for a subjective assessment of the quality of generated dance motions. The results validate the competitiveness of KMCGs.

通过在训练阶段保持域的独立性，我们通过在向后扩散中施加偏向采样，从而构造了源域关键帧生成的偏置，并将其应用为内容约束的梯度，以实现关键帧流形约束梯度（KMCGs）的框架，我们的验证结果表明，训练单独的模型在多达十种舞蹈动作风格之间进行转换，相比基线和消融的基于扩散的风格转换模型，在保留动作内容方面取得了显著的改进。此外，我们进行了主观评估的人类研究，以评估生成的舞蹈动作的质量，结果验证了KMCGs的竞争力。

基于限制扩散生成的可扩展动作风格迁移