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Interactive Multi-Character Motion Retargeting
Unified deformation-based framework preserves spatial relationships among multiple characters and environment during real-time interactive retargeting.
Abstract
A motion retargeting process is necessary as the body size and proportion of the actors are generally different from those of the target characters. However, the original spatial relationship between the multiple characters and the environment is easily broken when using previous motion retargeting methods, which are generally performed for each character independently. Therefore, time‐consuming manual adjustments by animators are usually required to obtain satisfactory results. To address these issues, we present a novel multicharacter motion retargeting method that preserves various types of spatial relationships between characters and environments. We establish a unified deformation‐based framework for the motion retargeting of multiple characters (more than two) or nonhuman characters with complex interactions. Also, an interactive motion editing interface with immediate feedback to the user is provided. We experimentally show that our method achieves a speedup when compared with previous motion retargeting methods.
How to read this
- Category
- Method: multi-character motion retargeting
- Contributions
- A unified deformation-based framework that retargets motion for multiple (more than two) or nonhuman characters while preserving spatial relationships between characters and environment
- An interactive motion editing interface with immediate feedback to the animator
- A reported speedup over previous retargeting methods that operate on each character independently
- Context
- Builds on the classic motion-retargeting lineage, notably Gleicher's Retargeting Motion to New Characters, extending it from single-character constraint solving to joint multi-character interaction preservation.Builds on: Retargeting Motion to New Characters
- Correctness
- The key assumption is that spatial relationships (contacts, relative poses) should be preserved jointly rather than per character; validation appears experimental with a speed comparison, so readers should treat the quality claims as demonstrated on the authors' interaction examples rather than a broad benchmark.
- Clarity
- Accessible problem statement; a first pass conveys the goal and interface, a second pass clarifies how the deformation framework encodes the relationships.
- How to read it
- Read pass one for the spatial-relationship problem and the unified deformation idea; a second pass pays off if you need the constraint formulation behind the interactive solver.
Builds on
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Related work
- Normalized Euclidean Distance Matrices for Human Motion Retargeting 2017 / MIG
- Dog Code: Human to Quadruped Embodiment Using Shared Codebooks 2024 / MIG
- Motion Retargeting for Crowd Simulation 2015 / DigiPro
- Retargeting Motion to New Characters 1998 / SIGGRAPH
Keywords
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