Multi-Object Sketch Animation with Grouping and Motion Trajectory Priors
Guotao Liang, Juncheng Hu, Ximing Xing, Jing Zhang, Qian Yu

TL;DR
GroupSketch is a new two-stage vector sketch animation method that effectively manages multi-object interactions and complex motions, improving temporal consistency and generalization over previous approaches.
Contribution
It introduces a novel two-stage pipeline with a Group-based Displacement Network and specialized modules for enhanced multi-object sketch animation.
Findings
Outperforms existing methods in animation quality and consistency.
Effectively handles complex multi-object interactions.
Demonstrates practical applicability in sketch animation tasks.
Abstract
We introduce GroupSketch, a novel method for vector sketch animation that effectively handles multi-object interactions and complex motions. Existing approaches struggle with these scenarios, either being limited to single-object cases or suffering from temporal inconsistency and poor generalization. To address these limitations, our method adopts a two-stage pipeline comprising Motion Initialization and Motion Refinement. In the first stage, the input sketch is interactively divided into semantic groups and key frames are defined, enabling the generation of a coarse animation via interpolation. In the second stage, we propose a Group-based Displacement Network (GDN), which refines the coarse animation by predicting group-specific displacement fields, leveraging priors from a text-to-video model. GDN further incorporates specialized modules, such as Context-conditioned Feature…
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Taxonomy
TopicsHuman Motion and Animation · Generative Adversarial Networks and Image Synthesis · 3D Shape Modeling and Analysis
