Spectral Matrix Decomposition-Based Motion Artifacts Removal in Multi-Channel PPG Sensor Signals

Xiong, Jiang; Cai, Lisang; Jiang, Dingde; Song, Houbing; He, Xiaowei

doi:10.1109/access.2016.2580594

Cited by 43 publications

(18 citation statements)

References 31 publications

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“…This approach could be combined with more sophisticated routines (e.g. a weighting scheme [38]) to combine input from PIR, radar and image processing to identify a ‘true‘ motion event with even greater accuracy [39]. …”

Section: Discussionmentioning

confidence: 99%

WiseEye: Next Generation Expandable and Programmable Camera Trap Platform for Wildlife Research

et al. 2017

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The widespread availability of relatively cheap, reliable and easy to use digital camera traps has led to their extensive use for wildlife research, monitoring and public outreach. Users of these units are, however, often frustrated by the limited options for controlling camera functions, the generation of large numbers of images, and the lack of flexibility to suit different research environments and questions. We describe the development of a user-customisable open source camera trap platform named ‘WiseEye’, designed to provide flexible camera trap technology for wildlife researchers. The novel platform is based on a Raspberry Pi single-board computer and compatible peripherals that allow the user to control its functions and performance. We introduce the concept of confirmatory sensing, in which the Passive Infrared triggering is confirmed through other modalities (i.e. radar, pixel change) to reduce the occurrence of false positives images. This concept, together with user-definable metadata, aided identification of spurious images and greatly reduced post-collection processing time. When tested against a commercial camera trap, WiseEye was found to reduce the incidence of false positive images and false negatives across a range of test conditions. WiseEye represents a step-change in camera trap functionality, greatly increasing the value of this technology for wildlife research and conservation management.

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Section: Discussionmentioning

confidence: 99%

WiseEye: Next Generation Expandable and Programmable Camera Trap Platform for Wildlife Research

et al. 2017

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“…It further improves the previous results by jointly exploiting the spectral structures of WPPG signal and the accelerometer signals. Motivated by the aforementioned model, Xiong et al [24] presented an approach, denoted by MC-SMD. In MC-SMD, a spectral matrix is constructed by using multi-channel WPPG sensor signals and simultaneous acceleration signals.…”

Section: Introductionmentioning

confidence: 99%

SVM-Based Spectral Analysis for Heart Rate from Multi-Channel WPPG Sensor Signals

Xiong

Cai

Wang

et al. 2017

Sensors

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Although wrist-type photoplethysmographic (hereafter referred to as WPPG) sensor signals can measure heart rate quite conveniently, the subjects’ hand movements can cause strong motion artifacts, and then the motion artifacts will heavily contaminate WPPG signals. Hence, it is challenging for us to accurately estimate heart rate from WPPG signals during intense physical activities. The WWPG method has attracted more attention thanks to the popularity of wrist-worn wearable devices. In this paper, a mixed approach called Mix-SVM is proposed, it can use multi-channel WPPG sensor signals and simultaneous acceleration signals to measurement heart rate. Firstly, we combine the principle component analysis and adaptive filter to remove a part of the motion artifacts. Due to the strong relativity between motion artifacts and acceleration signals, the further denoising problem is regarded as a sparse signals reconstruction problem. Then, we use a spectrum subtraction method to eliminate motion artifacts effectively. Finally, the spectral peak corresponding to heart rate is sought by an SVM-based spectral analysis method. Through the public PPG database in the 2015 IEEE Signal Processing Cup, we acquire the experimental results, i.e., the average absolute error was 1.01 beat per minute, and the Pearson correlation was 0.9972. These results also confirm that the proposed Mix-SVM approach has potential for multi-channel WPPG-based heart rate estimation in the presence of intense physical exercise.

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“…WSN is a complex network system and integrates data acquisition, processing and transmission, which consists of sensor module, wireless communication module, data processing module, power supply module and so on [6–9]. Compared with the traditional communication network, WSN has the advantages of small volume, high flexibility, strong self-organization and so on [10–13].…”

Section: Introductionmentioning

confidence: 99%

WSN-Based Space Charge Density Measurement System

Deng

Yuan

et al. 2017

PLoS ONE

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It is generally acknowledged that high voltage direct current (HVDC) transmission line endures the drawback of large area, because of which the utilization of cable for space charge density monitoring system is of inconvenience. Compared with the traditional communication network, wireless sensor network (WSN) shows advantages in small volume, high flexibility and strong self-organization, thereby presenting great potential in solving the problem. Additionally, WSN is more suitable for the construction of distributed space charge density monitoring system as it has longer distance and higher mobility. A distributed wireless system is designed for collecting and monitoring the space charge density under HVDC transmission lines, which has been widely applied in both Chinese state grid HVDC test base and power transmission projects. Experimental results of the measuring system demonstrated its adaptability in the complex electromagnetic environment under the transmission lines and the ability in realizing accurate, flexible, and stable demands for the measurement of space charge density.

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Spectral Matrix Decomposition-Based Motion Artifacts Removal in Multi-Channel PPG Sensor Signals

Cited by 43 publications

References 31 publications

WiseEye: Next Generation Expandable and Programmable Camera Trap Platform for Wildlife Research

WiseEye: Next Generation Expandable and Programmable Camera Trap Platform for Wildlife Research

SVM-Based Spectral Analysis for Heart Rate from Multi-Channel WPPG Sensor Signals

WSN-Based Space Charge Density Measurement System

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