Lalor, Edmund C. and Reilly, Richard B. and Pearlmutter, Barak A. and Foxe, John J. (2006) A Spectrum of Colors: Investigating the Temporal Frequency Characteristics of the Human Visual System Using a System Identification Approach. Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE . pp. 3720-3723. ISSN 1557-170X

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Abstract

Noise input signals are commonly used in both linear and nonlinear system identification of physiological systems. This method can be applied to electrophysiological analysis of the human visual system by controlling the modulation of the contrast of a checkerboard stimulus using a pre-computed noise waveform. In this study we describe how one can obtain an estimate of the linear impulse response of the visual system using noise waveforms. Furthermore, we examine the impulse responses obtained using noise signals with different frequency characteristics, in an attempt to investigate the temporal frequency characteristics of the human visual system. We show that noise signals with frequency content greater than 15 Hz are more effective at evoking these responses than those with little or no power at high frequencies.

Item Type:	Article
Keywords:	checkerboard stimulus; color spectrum; electrophysiological analysis; human visual system; linear impulse response; noise input signal; noise waveform; physiological system; system identification; temporal frequency characteristics; colour vision; transient response; visual evoked potentials;
Academic Unit:	Faculty of Science and Engineering > Computer Science Faculty of Science and Engineering > Research Institutes > Hamilton Institute
Item ID:	2048
Depositing User:	Barak Pearlmutter
Date Deposited:	14 Jul 2010 15:49
Journal or Publication Title:	Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE
Publisher:	Institute of Electrical and Electronics Engineers (IEEE)
Refereed:	Yes
URI:	http://ieeexplore.ieee.org/Xplore/guesth...
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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