An evaluation of sensory noise in the human visual system. (English) Zbl 0743.92038
Two approximations for the probability of a level-crossing by a nonstationary stochastic process are introduced. The considered process is composed of a deterministic function to which an additive wide-sense stationary Gaussian noise is added. The presented approximations are used for estimation of the threshold \(S\) and of the second spectral moment of the noise. The method is applied in the case of the sinusoidal deterministic part of the process. The data compared with the theory comes from experiments on visual perception, and simultaneously Weibull approximation for level-crossing detection is criticised.
Reviewer: P.Lánský (Praha)
MSC:
| 91E30 | Psychophysics and psychophysiology; perception |
| 60G35 | Signal detection and filtering (aspects of stochastic processes) |
| 60G70 | Extreme value theory; extremal stochastic processes |
Keywords:
extreme value theory; Weibull distribution; nonstationary stochastic process; additive wide-sense stationary Gaussian noise; threshold; second spectral moment; sinusoidal deterministic part; visual perception; approximations for level-crossing detectionReferences:
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