[1] Poh M Z, McDuff D J, Picard R W. Opt. Express, 2010, 18(10): 10762.
[2] Monkaresi H, Calvo R A, Hong Y. IEEE Journal of Biomedical and Health Informatics, 2013, 18(4): 1153.
[3] Poh M, McDuff D J, Picard R W. IEEE Transactions on Biomedical Engineering, 2011, 58(1): 7.
[4] Balakrishnan G, Durand F, Guttag J. IEEE Conference on Computer Vision and Pattern Recognition, 2013, 6: 3430.
[5] McDuff D, Gontarek S, Picard R W. IEEE Transactions on Biomedical Engineering, 2014, 61(10): 2593.
[6] Rao Ruijian, Lai Xinquan, Li Yushan. Microelectronics, 2001(4): 272.
[7] Liu Zhi, Chai Hua, Li Nana. Optics and Precision Engineering, 2009, (8): 2017.
[8] Liu Dan, Liu Zhi, Sun Wei, et al. Journal of Jilin University, 2012, 30(6): 622.
[9] Xiong Hui, Yang Xue, Zhou Mei, et al. Spectroscopy and Spectral Analysis, 2014, 34(4): 1130.
[10] Wang Anmin, Chen liangfu. Application of Electronic Technique, 2006, 32(11): 118.
[11] Wang Wenjin, Sander Stuijk, Gerard de Haan. IEEE TBME, 2015, 6: 415.
