Journal
COMPUTERS & GRAPHICS-UK
Volume 89, Issue -, Pages 11-23Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cag.2020.04.002
Keywords
Motion retargeting; Rigging-free animation; Mesh deformation; Shape transfer; Surface-based retargeting; Character animation
Categories
Funding
- Inria IPL AVATAR project
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We present an automatic method that allows to retarget poses from a source to a target character by transferring the shape of the target character onto the desired pose of the source character. By considering shape instead of pose transfer our method allows to better preserve the contextual meaning of the source pose, typically contacts between body parts, than pose-based strategies. To this end, we propose an optimization-based method to deform the source shape in the desired pose using three main energy functions: similarity to the target shape, body part volume preservation, and collision management to preserve existing contacts and prevent penetrations. The results show that our method allows to retarget complex poses with several contacts to different morphologies, and is even able to create new contacts when morphology changes require them, such as increases in body size. To demonstrate the robustness of our approach to different types of shapes, we successfully apply it to basic and dressed human characters as well as wild animal models, without the need to adjust parameters. (C) 2020 Elsevier Ltd. All rights reserved.
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