Journal
PHYSIOLOGICAL MEASUREMENT
Volume 37, Issue 5, Pages N27-N37Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0967-3334/37/5/N27
Keywords
heart rate; motion artefact; non-contact; panning; photoplethysmography (PPG)
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/K503101/1]
- Cooperative Awards in Science and Engineering (CASE) scheme with Tioga Ltd (Derby, UK)
- Engineering and Physical Sciences Research Council [1223240] Funding Source: researchfish
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Non-contact photoplethysmography (PPG) provides multiple benefits over in-contact methods, but is not as tolerant to motion due to the lack of mechanical coupling between the subject and sensor. One limitation of non-contact photoplethysmography is discussed here, specifically looking at the topology and optical variations of the skin and how this impacts upon the ability to extract a photoplethysmogram when a subject moves horizontally across the field of view of the detector (a panning motion). When this occurs it is shown that whilst the general relationships between the speed of traversal, detection area and resultant signal quality can be found, the quality of signal in each individual case is determined by the properties of the area of skin chosen.
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