VDT visual fatigue monitoring based on feature extraction from unconstrained BCG

Autor: Lin Weimin, Sun Guifen, Peng Wang, Yongxiang Jiang, Jinjing Cao, Hongchao Zhou
Jazyk: angličtina
Rok vydání: 2019
Předmět:
sd subjective evaluation
computer displays
wavelet algorithm
vdt visual fatigue monitoring
signal denoising
Computer science
electrocardiography
Fast Fourier transform
Feature extraction
lf
Energy Engineering and Power Technology
Interval (mathematics)
vdt visual fatigue test
unconstrained bcg
Display device
unconstrained visual display terminal visual fatigue monitoring method
Acceleration
Computer vision
acceleration signals
medical signal processing
display devices
jj interval
business.industry
feature extraction
General Engineering
Wavelet transform
rr interval
time-domain analysis
Confidence interval
fast fourier transforms
frequency-domain analysis
wavelet transforms
lcsh:TA1-2040
Frequency domain
human computer interaction
ifft
fatigue
Artificial intelligence
business
unconstrained monitoring
lcsh:Engineering (General). Civil engineering (General)
virtual instrumentation
Software
Zdroj: The Journal of Engineering (2019)
DOI: 10.1049/joe.2018.9197
Popis: An unconstrained visual display terminal (VDT) visual fatigue monitoring method based on BCG is studied. A VDT visual fatigue test is designed and implemented in this study, also acceleration signals are obtained by using an acceleration sensor, which is installed on the seat back. Then, BCG is obtained by adaptive threshold wavelet denoising, FFT, frequency domain filtering in the range of heart rate, and IFFT. Low frequency (LF) is extracted after the RR interval and JJ interval are calculated by the wavelet algorithm. Curves of two kinds of LF with the usage of VDT were obtained and were identical. Thus, the authors can draw conclusions that BCG can replace ECG to achieve unconstrained monitoring of VDT visual fatigue and LF gradually increases with VDT visual fatigue becoming more and more serious. Finally, we compare LF curves of BCG and ECG during use VDT to draw a conclusion that BCG can replace ECG to monitor VDT visual fatigue in an unconstrained way. Also, the confidence interval is used to verify the reliability of SD subjective evaluation, and the conclusion is reliable.
Databáze: OpenAIRE
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