Spontaneous Pupillary Oscillation Signal Analysis Applying Hilbert Huang Transform

Fabiola M. Villalobos-Castaldi, José Ruiz-Pinales, Nicolás C. Kemper-Valverde, Mercedes Flores-Flores, Laura G. Ramírez-Sánchez, Metztli G. Ortiz-Hernández
2016 Proceedings of the 9th International Joint Conference on Biomedical Engineering Systems and Technologies  
This paper proposes a new application of the Hilbert-Huang transform (HHT). Pupillogram recordings were analyzed through the non-traditional HHT to investigate patterns in the time-frequency parameters of Spontaneous Pupillary Oscillation (SPO) signals. The traditional Fourier transform is only useful for linear stationary signals analysis, but the HHT was designed for the analysis of non-linear and non-stationary signals. However, the HHT is a more suitable tool to study SPO signals which are
more » ... undamentally nonstationary. The intrinsic properties of the Spontaneous Pupillary Oscillation signals were highlighted by the HHT scheme and the results showed that SPO waves present local and intermittent variations through the time span. The numerical parameters demonstrated that it is a wide inter-subject variation in the intrinsic timefrequency parameters contribution from each yielding mode to the total signal content.
doi:10.5220/0005697400670077 dblp:conf/biostec/Villalobos-Castaldi16 fatcat:plqep5ungzelzlv3y2oyo3zi2y