Published October 1, 2020 | Version Accepted pre-print
Conference paper Open

Adult2child: Motion Style Transfer using CycleGANs

  • 1. University of Florida
  • 2. University of Cyprus and RISE Research Centre
  • 3. The Interdisciplinary Center Herzliya
  • 4. Carnegie Mellon University


Child characters are commonly seen in leading roles in top-selling video games. Previous studies have shown that child motions are
perceptually and stylistically different from those of adults. Creating motion for these characters by motion capturing children is
uniquely challenging because of confusion, lack of patience and regulations. Retargeting adult motion, which is much easier to record, onto child skeletons, does not capture the stylistic differences. In this paper, we propose that style translation is an effective way to transform adult motion capture data to the style of child motion. Our method is based on CycleGAN, which allows training on a relatively small number of sequences of child and adult motions that do not even need to be temporally aligned. Our adult2child
network converts short sequences of motions called motion words from one domain to the other. The network was trained using a
motion capture database collected by our team containing 23 locomotion and exercise motions. We conducted a perception study to
evaluate the success of style translation algorithms, including our algorithm and recently presented style translation neural networks.
Results show that the translated adult motions are recognized as child motions significantly more often than adult motions.


This work has been partly supported by the project that has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 739578 (RISE – Call: H2020-WIDESPREAD-01-2016-2017-TeamingPhase2) and the Government of the Republic of Cyprus through the Directorate General for European Programmes, Coordination and Development.



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RISE – Research Center on Interactive Media, Smart System and Emerging Technologies 739578
European Commission