Dec 2, 2022
Skeleton-based action recognition attracts practitioners and researchers due to the lightweight, compact nature of datasets. Compared with RGB-video-based action recognition, skeleton-based action recognition is a safer way to protect the privacy of subjects while having competitive recognition performance. However, due to improvements in skeleton estimation algorithms as well as motion- and depth- sensors, more details of motion characteristics can be preserved in the skeleton dataset, leading to potential privacy leakage. To investigate the potential privacy leakage from skeleton datasets, we first train a classifier to categorize sensitive private information from trajectories of joints. Our preliminary experiments show that the gender classifier achieves 87
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