Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing Society
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...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2015/625034 |
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| _version_ | 1832558768384114688 |
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| author | Karine Joulan Roland Brémond Nicolas Hautière |
| author_facet | Karine Joulan Roland Brémond Nicolas Hautière |
| author_sort | Karine Joulan |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-fb76abb1bbc14fbfbec9f60a00376a90 |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-fb76abb1bbc14fbfbec9f60a00376a902025-02-03T01:31:44ZengWileyThe Scientific World Journal2356-61401537-744X2015-01-01201510.1155/2015/625034625034Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing SocietyKarine Joulan0Roland Brémond1Nicolas Hautière2COSYS, IFSTTAR, Université Paris-Est, 77447 Marne-la-Vallée, FranceCOSYS, IFSTTAR, Université Paris-Est, 77447 Marne-la-Vallée, FranceCOSYS, IFSTTAR, Université Paris-Est, 77447 Marne-la-Vallée, FranceThe 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.http://dx.doi.org/10.1155/2015/625034 |
| spellingShingle | Karine Joulan Roland Brémond Nicolas Hautière Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing Society The Scientific World Journal |
| title | Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing Society |
| title_full | Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing Society |
| title_fullStr | Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing Society |
| title_full_unstemmed | Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing Society |
| title_short | Towards an Analytical Age-Dependent Model of Contrast Sensitivity Functions for an Ageing Society |
| title_sort | towards an analytical age dependent model of contrast sensitivity functions for an ageing society |
| url | http://dx.doi.org/10.1155/2015/625034 |
| work_keys_str_mv | AT karinejoulan towardsananalyticalagedependentmodelofcontrastsensitivityfunctionsforanageingsociety AT rolandbremond towardsananalyticalagedependentmodelofcontrastsensitivityfunctionsforanageingsociety AT nicolashautiere towardsananalyticalagedependentmodelofcontrastsensitivityfunctionsforanageingsociety |