scholarly journals A light transport model for mitigating multipath interference in Time-of-flight sensors

2015 ◽  
Author(s):  
Nikhil Naik ◽  
Achuta Kadambi ◽  
Christoph Rhemann ◽  
Shahram Izadi ◽  
Ramesh Raskar ◽  
...  
Keyword(s):  
Transport Model ◽  
Time Of Flight ◽  
Light Transport ◽  
Multipath Interference

scholarly journals Decomposing Global Light Transport Using Time of Flight Imaging

2013 ◽  
Vol 107 (2) ◽  
pp. 123-138 ◽  
Author(s):  
Di Wu ◽  
Andreas Velten ◽  
Matthew O’Toole ◽  
Belen Masia ◽  
Amit Agrawal ◽  
...  
Keyword(s):  
Time Of Flight ◽  
Light Transport ◽  
Time Of Flight Imaging

scholarly journals Synthetic Photoplethysmography (PPG) of the radial artery through parallelized Monte Carlo and its correlation to Body Mass Index (BMI)

2020 ◽  
Author(s):  
Tananant Boonya-ananta ◽  
Andres J. Rodriguez ◽  
Ajmal Ajmal ◽  
Vinh Nguyen Du Le ◽  
Anders K. Hansen ◽  
...  
Keyword(s):  
Cardiovascular Disease ◽  
Body Mass Index ◽  
Monte Carlo ◽  
Body Mass ◽  
Radial Artery ◽  
Transport Model ◽  
The United States ◽  
Light Transport ◽  
Signal Ratio ◽  
Experimental Stage

ABSTRACTCardiovascular disease is one of the leading causes of death in the United States and obesity significantly increases the risk of cardiovascular disease. The measurement of blood pressure (BP) is critical in monitoring and managing cardiovascular disease hence new wearable devices are being developed to make the BP metric mode accessible to physicians and patients. Several wearables utilize photoplethysmography from the wrist vasculature to derive BP assessment although many of these devices are still at the experimental stage. With the ultimate goal of supporting instrument development, we have developed a model the photoplethysmographic waveform derived from the radial artery at the volar surface of the wrist. To do so we have utilized the relation between vessel biomechanics through Finite Element Method and Monte Carlo light transport model. The model shows similar features to that seen in PPG waveform captured using an off the shelf device. We observe the influence of body mass index (BMI) on the PPG signal. A degradation the PPG signal of up to 40% in AC to DC signal ratio was thus observed.

scholarly journals Resolving multipath interference in time-of-flight imaging via modulation frequency diversity and sparse regularization

2014 ◽  
Vol 39 (6) ◽  
pp. 1705 ◽  
Author(s):  
Ayush Bhandari ◽  
Achuta Kadambi ◽  
Refael Whyte ◽  
Christopher Barsi ◽  
Micha Feigin ◽  
...  
Keyword(s):  
Modulation Frequency ◽  
Time Of Flight ◽  
Frequency Diversity ◽  
Sparse Regularization ◽  
Multipath Interference ◽  
Time Of Flight Imaging
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