Paper Info
Title
Photoplethysmography Signal Analysis for Optimal Region-of-Interest Determination in Video Imaging on a Built-In Smartphone under Different Conditions.
Abstract
Smartphones and tablets are widely used in medical fields, which can improve healthcare and reduce healthcare costs. Many medical applications for smartphones and tablets have already been developed and widely used by both health professionals and patients. Specifically, video recordings of fingertips made using a smartphone camera contain a pulsatile component caused by the cardiac pulse equivalent to that present in a photoplethysmographic signal. By performing peak detection on the pulsatile signal, it is possible to estimate a continuous heart rate and a respiratory rate. To estimate the heart rate and respiratory rate accurately, which pixel regions of the color bands give the most optimal signal quality should be investigated. In this paper, we investigate signal quality to determine the best signal quality by the largest amplitude values for three different smartphones under different conditions. We conducted several experiments to obtain reliable PPG signals and compared the PPG signal strength in the three color bands when the flashlight was both on and off. We also evaluated the intensity changes of PPG signals obtained from the smartphones with motion artifacts and fingertip pressure force. Furthermore, we have compared the PSNR of PPG signals of the full-size images with that of the region of interests (ROIs).
Year
DOI
Venue
2017
10.3390/s17102385
SENSORS
Keywords
Field
DocType
healthcare,smartphone,photoplethysmography (PPG),motion artifact,ROI
Flashlight,Computer vision,Signal processing,Pulsatile flow,Signal quality,Photoplethysmogram,Pulse (signal processing),Electronic engineering,Pixel,Artificial intelligence,Region of interest,Engineering
Journal
Volume
Issue
ISSN
17
10.0
1424-8220
Citations 
PageRank 
References 
0
0.34
6
Authors
2
Name
Order
Citations
PageRank
Yunyoung Nam126639.60
Yun-Cheol Nam221.08