About the Authors

Yong Liu

liuyo@i2r.a-star.edu.sg

Affiliations Joint NTU-UBC Research Centre of Excellence in Active Living for the Elderly (LILY), and School of Computer Engineering, Nanyang Technological University, Singapore, Institute for Infocomm Research (I2R), Agency for Science, Technology and Research (A*STAR), Singapore

Min Wu

Affiliation Institute for Infocomm Research (I2R), Agency for Science, Technology and Research (A*STAR), Singapore

Chunyan Miao

Affiliation Joint NTU-UBC Research Centre of Excellence in Active Living for the Elderly (LILY), and School of Computer Engineering, Nanyang Technological University, Singapore

Peilin Zhao

Affiliation Institute for Infocomm Research (I2R), Agency for Science, Technology and Research (A*STAR), Singapore

Xiao-Li Li

Affiliation Institute for Infocomm Research (I2R), Agency for Science, Technology and Research (A*STAR), Singapore

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YL MW PZ XLL. Performed the experiments: YL. Analyzed the data: YL MW. Contributed reagents/materials/analysis tools: YL CM. Wrote the paper: YL MW CM PZ XLL. Designed the software used in analysis: YL.