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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2015 Sep 15;63(3):463–477. doi: 10.1109/TBME.2015.2476337

Fig. 5.

Fig. 5

A cellphone based IPPG system with (a) showing position of the video unit comprising a white LED (WLED) and camera; (b) showing light PPG imaging of the index finger positioned to cover the cellphone video unit (modified from [77]).