ConMo: Controllable Motion Disentanglement and Recomposition for Zero-Shot Motion Transfer
This addresses motion control challenges in video generation for applications like editing and simulation, though it appears incremental as it builds on existing T2V methods.
The paper tackles the problem of motion transfer in multi-subject videos, where existing methods struggle with transferring specific subject motion and preserving motion diversity across varying shapes, and introduces ConMo, a zero-shot framework that significantly outperforms state-of-the-art methods in motion fidelity and semantic consistency.
The development of Text-to-Video (T2V) generation has made motion transfer possible, enabling the control of video motion based on existing footage. However, current methods have two limitations: 1) struggle to handle multi-subjects videos, failing to transfer specific subject motion; 2) struggle to preserve the diversity and accuracy of motion as transferring to subjects with varying shapes. To overcome these, we introduce \textbf{ConMo}, a zero-shot framework that disentangle and recompose the motions of subjects and camera movements. ConMo isolates individual subject and background motion cues from complex trajectories in source videos using only subject masks, and reassembles them for target video generation. This approach enables more accurate motion control across diverse subjects and improves performance in multi-subject scenarios. Additionally, we propose soft guidance in the recomposition stage which controls the retention of original motion to adjust shape constraints, aiding subject shape adaptation and semantic transformation. Unlike previous methods, ConMo unlocks a wide range of applications, including subject size and position editing, subject removal, semantic modifications, and camera motion simulation. Extensive experiments demonstrate that ConMo significantly outperforms state-of-the-art methods in motion fidelity and semantic consistency. The code is available at https://github.com/Andyplus1/ConMo.