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Special Section Technical Briefs

The PhysioCam: Cardiac Pulse, Continuously Monitored by a Color Video Camera1

[+] Author and Article Information
Maria I. Davila, Gregory F. Lewis

Department of Psychiatry,
School of Medicine,
University of North Carolina at Chapel Hill,
Chapel Hill, NC 27514

Stephen W. Porges

Department of Psychiatry,
School of Medicine,
University of North Carolina at Chapel Hill,
Chapel Hill, NC 27514;
Kinsey Institute,
Indiana University,
Bloomington, IN 47405

DOI: 10.1115/1.4033245Manuscript received March 1, 2016; final manuscript received March 17, 2016; published online May 12, 2016. Editor: William Durfee.

J. Med. Devices 10(2), 020951 (May 12, 2016) (2 pages) Paper No: MED-16-1173; doi: 10.1115/1.4033245 History: Received March 01, 2016; Revised March 17, 2016

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References

Lewis, G. F. , Gatto, R. G. , and Porges, S. W. , 2011, “ A Novel Method for Extracting Respiration Rate and Relative Tidal Volume From Infrared Thermography,” Psychophysiology, 48(7), pp. 877–887. [CrossRef] [PubMed]
Porges, S. W. , and Byrne, E. A. , 1992, “ Research Methods for Measurement of Heart Rate and Respiration,” Biol. Psychol., 34(2–3), pp. 93–130. [CrossRef] [PubMed]
Poh, M. Z. , McDuff, D. J. , and Picard, R. W. , 2011, “ Advancements in Noncontact, Multiparameter Physiological Measurements Using a Webcam,” IEEE Trans. Biomed. Eng., 58(1), pp. 7–11. [CrossRef] [PubMed]
Davila, M. I. , 2012, “ Noncontact Extraction of Human Arterial Pulse With a Commercial Digital Color Video Camera,” Ph.D. thesis, University of Illinois, Chicago, IL.
Reisner, A. , Shaltis, P. A. , McCombie, D. , and Asada, H. H. , 2008, “ Utility of the Photoplethysmogram in Circulatory Monitoring,” Anesthesiology, 108(5), pp. 950–958. [CrossRef] [PubMed]
Prahl, S. , 1998, “ Tabulated Molar Extinction Coefficient for Hemoglobin in Water,” Oregon Medical Laser Center, Portland, OR, http://omlc.org/spectra/hemoglobin/summary.html
Zonios, G. , Bykowski, J. , and Kollia, N. , 2001, “ Skin Melanin, Hemoglobin, and Light Scattering Properties Can be Quantitatively Assessed In Vivo Using Diffuse Reflectance Spectroscopy,” J. Invest. Dermatol., 117(6), pp. 1452–1457. [CrossRef] [PubMed]
Jones, M. J. , and Rehg, J. M. , 2002, “ Statistical Color Models With Application to Skin Detection,” Int. J. Comput. Vision, 6(1), pp. 81–96. [CrossRef]
Porges, S. W. , and Bohrer, R. E. , 1990, “ Analyses of Periodic Processes in Psychophysiological Research,” Principles of Psychophysiology: Physical, Social, and Inferential Elements, J. T. Cacioppo and L. G. Tassinary , eds., Cambridge University Press, New York, pp. 708–753.

Figures

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Fig. 1

Relative spectral absorption of Hb, HbO2, and two types of human skin within the camera sensor range

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Fig. 2

Process to obtain the arterial pulse from the video: (a) steps to transform one frame of live video into one sample of the cardiac pulse (large dot after step 6) and (b) the large dot represents one processed video frame, consecutive samples yield the arterial wave time-series

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Fig. 3

IBIs from one subject: PhysioCam and ECG

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Fig. 4

Scatter plot of resting baseline IBIs: ECG and PhysioCam

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Fig. 5

Scatter plot of resting baseline HRV magnitude: ECG and PhysioCam

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