Egocentric video: a new tool for capturing hand use of individuals with spinal cord injury at home

Journal of NeuroEngineering and Rehabilitation

Jirapat Likitlersuang¹  José Zariffa¹  Ryan J. Visée¹  Elizabeth R. Sumitro¹  Tianshi Cao²  Sukhvinder Kalsi-Ryan² 

[1] Institute of Biomaterials & Biomedical Engineering, University of Toronto;KITE, Toronto Rehabilitation Institute, University Health Network;

关键词: Tetraplegia;    Upper extremity;    Outcome measure;    Egocentric vision;    Community-based rehabilitation;    Rehabilitation engineering;   

DOI  :  10.1186/s12984-019-0557-1

来源: DOAJ

【 摘 要 】

Abstract Background Current upper extremity outcome measures for persons with cervical spinal cord injury (cSCI) lack the ability to directly collect quantitative information in home and community environments. A wearable first-person (egocentric) camera system is presented that aims to monitor functional hand use outside of clinical settings. Methods The system is based on computer vision algorithms that detect the hand, segment the hand outline, distinguish the user’s left or right hand, and detect functional interactions of the hand with objects during activities of daily living. The algorithm was evaluated using egocentric video recordings from 9 participants with cSCI, obtained in a home simulation laboratory. The system produces a binary hand-object interaction decision for each video frame, based on features reflecting motion cues of the hand, hand shape and colour characteristics of the scene. Results The output from the algorithm was compared with a manual labelling of the video, yielding F1-scores of 0.74 ± 0.15 for the left hand and 0.73 ± 0.15 for the right hand. From the resulting frame-by-frame binary data, functional hand use measures were extracted: the amount of total interaction as a percentage of testing time, the average duration of interactions in seconds, and the number of interactions per hour. Moderate and significant correlations were found when comparing these output measures to the results of the manual labelling, with ρ = 0.40, 0.54 and 0.55 respectively. Conclusions These results demonstrate the potential of a wearable egocentric camera for capturing quantitative measures of hand use at home.

【 授权许可】

Unknown