arXiv Computer Vision By Yunjiao Zhou, Junlang Qian, Lihua Xie, Jianfei Yang

Parasitic Co-Denoising: Unlocking 3D Human Motion Generation in a Frozen Video Diffusion Model

Read the original on arXiv Computer Vision →

The paper demonstrates that large text-to-video diffusion models contain implicit 3D motion information in their intermediate denoising states. By introducing parasitic co-denoising, the authors extract motion directly from the frozen model using a Parasitic Motion Decoder (PMD) that shares the noise schedule and fuses intermediate features. This approach yields efficient, aligned 3D motion generation without training a separate motion model, achieving comparable results to dedicated generators with far fewer parameters.

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