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- W3048664086 abstract "Due to occlusion or detached markers, information can often be lost while capturing human motion with optical tracking systems. Based on three natural properties of human gait movement, this study presents two different approaches to recover corrupted motion data. These properties are used to define a reconstruction model combining low-rank matrix completion of the measured data with a group-sparsity prior on the marker trajectories mapped in the frequency domain. Unlike most existing approaches, the proposed methodology is fully unsupervised and does not need training data or kinematic information of the user. We evaluated our methods on four different gait datasets with various gap lengths and compared their performance with a state-of-the-art approach using principal component analysis (PCA). Our results showed recovering missing data more precisely, with a reduction of at least 2 mm in mean reconstruction error compared to the literature method. When a small number of marker trajectories is available, our findings showed a reduction of more than 14 mm for the mean reconstruction error compared to the literature approach." @default.
- W3048664086 created "2020-08-18" @default.
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- W3048664086 date "2020-08-13" @default.
- W3048664086 modified "2023-09-25" @default.
- W3048664086 title "Low-Rank and Sparse Recovery of Human Gait Data" @default.
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- W3048664086 doi "https://doi.org/10.3390/s20164525" @default.
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