light intensity

The waveform of the photoplethysmographic image (PPGi) signals may be significantly affected by the light spectra and intensity. The purpose of this study is to evaluate the performance of PPGi aveform acquisition in the red, green and blue channels using a commercial camera in different light conditions. The fitted curve of PPGi amplitudes in the RGB channels with different light intensity for 470 nm, 490 nm, 505 nm, 590 nm, 600 nm, 610 nm, 625 nm, 660 nm wavelengths and white light. X-axes represent averaging DC output form pixels and y-axes represent averaging AC output form pixels. These representative data are from one male, age 30 years old.

The Effect of Light Conditions on Photoplethysmographic Image Acquisition Using a Commercial Camera

Author(s): He Liu, Yadong Wang, Lei Wang
The Effect of Light Conditions on Photoplethysmographic Image Acquisition Using a Commercial Camera 540 211 IEEE Journal of Translational Engineering in Health and Medicine (JTEHM)

The waveform of the photoplethysmographic image (PPGi) signals may be significantly affected by the light spectra and intensity. The purpose of this study is to evaluate the performance of PPGi…

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