Biological Cybernetics

, Volume 62, Issue 5, pp 441–451 | Cite as

Changes with background in the linear model of the transient visual system

  • A. C. den Brinker


There is evidence that the transient channel of temporal human vision behaves as a linear filter for small excursions around a steady background level. The linear filter characteristics depend on the background level. From experimentally obtained impulse responses of the transient channel the linear filter can be modelled and parametrized. This has been done for two different background levels. The two sets of estimated parameters at these two levels show a shift in the parameters which can be described by a single multiplication factor. This result was extrapolated to arbitrary background levels by postulating that each change in background level can be described by a multiplication factor. This leads to an assumption on the variation of the parameters of the linear filter of the transient channel with changes in the background level. This assumption is tested by simulating the system for different parameter sets of the linear filter. The simulations give a good agreement with experimental data on threshold-versus-duration curves and de Lange curves. The (minor) quantitative differences in simulations and experimental data can be explained.


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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • A. C. den Brinker
    • 1
    • 2
  1. 1.Interdepartmental Group Retina ModelsIPO Institute for Perception ResearchEindhovenThe Netherlands
  2. 2.EE DepartmentEindhoven University of TechnologyEindhovenThe Netherlands

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