title: Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing Society.
abstract: The Contrast Sensitivity Function (CSF) describes how the visibility of a grating depends on the stimulus spatial frequency. Many published CSF data have demonstrated that contrast sensitivity declines with age. However, an age-dependent analytical model of the CSF is not available to date. In this paper, we propose such an analytical CSF model based on visual mechanisms, taking into account the age factor. To this end, we have extended an existing model from Barten (1999), taking into account the dependencies of this model's optical and physiological parameters on age. Age-dependent models of the cones and ganglion cells densities, the optical and neural MTF, and optical and neural noise are proposed, based on published data. The proposed age-dependent CSF is finally tested against available experimental data, with fair results. Such an age-dependent model may be beneficial when designing real-time age-dependent image coding and display applications.
authors.affiliation: COSYS, IFSTTAR, Université Paris-Est, 77447 Marne-la-Vallée, France ; Continental Automotive France SAS, 1 avenue Paul Ourliac, 31036 Toulouse, France.
authors.forename: Karine
authors.initials: K
authors.lastname: Joulan
authors.affiliation: COSYS, IFSTTAR, Université Paris-Est, 77447 Marne-la-Vallée, France.
authors.forename: Roland
authors.initials: R
authors.lastname: Brémond
authors.affiliation: COSYS, IFSTTAR, Université Paris-Est, 77447 Marne-la-Vallée, France.
authors.forename: Nicolas
authors.identifier: 0000-0002-4885-5919
authors.initials: N
authors.lastname: Hautière
mesh_terms: D000375:Aging; D000465:Algorithms; D015350:Contrast Sensitivity; D006801:Humans; D008954:Models, Biological