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SketchiMo: Sketch-based Motion Editing for Articulated Characters
Byungkuk Choi, Roger Blanco i Ribiera, J P Lewis, Yeongho Seol, Seokpyo Hong, Haegwang Eom, Sunjin Jung, Junyong Noh
Sketch-based interface for editing articulated character motion, enabling intuitive spatial control over limb trajectories and poses.
Abstract
SketchiMo presents a sketch-based interface for expressive editing of articulated character motion, introducing sketch targets and sketch spaces as dynamic, view-dependent pictorial representations. The system solves for motion from projective constraints relating sketch inputs to unknown 3D poses, enabling seamless editing of diverse properties from joint trajectories to abstract coordinated motions through a unified optimization framework.
How to read this
- Category
- Method: a sketch-based interface for editing articulated character motion
- Contributions
- SketchiMo, a sketch-based interface for expressive editing of articulated character motion
- Introduces sketch targets and sketch spaces as dynamic, view-dependent pictorial representations of motion
- A unified optimization that solves for 3D poses from projective constraints relating sketch input to unknown poses, spanning joint trajectories to abstract coordinated motions
- Context
- Relates to sketch-based and trajectory-based animation editing, framing motion editing as recovering 3D poses from view-dependent 2D sketch constraints.
- Correctness
- Demonstrated on a range of editing tasks via the projective-constraint optimization; results depend on viewpoint and the under-constrained 2D-to-3D mapping, so edits may need disambiguation and the breadth of motions handled is shown by example rather than exhaustively.
- Clarity
- Interaction concept is accessible; a first pass conveys the idea, while the projective-constraint formulation rewards a second pass.
- How to read it
- First pass to grasp sketch targets and sketch spaces; do a second pass on the unified optimization and constraint setup if you want to understand or reproduce the solver.
Related work
- How the Rig Design Impacts the Animation Process 2021 / DigiPro
- Sketch express: A sketching interface for facial animation 2012 / C&G
- Retargeting Motion to New Characters 1998 / SIGGRAPH
- Pose and Skeleton-aware Neural IK for Pose and Motion Editing 2023 / SIGGRAPH Asia
Keywords
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