Contrast sensitivity model of the human eye

Andras Roka, Peter Galambos, Peter Baranyi

Research output: Conference contribution

3 Citations (Scopus)

Abstract

In this paper, we propose a mathematical model of human photopic contrast sensitivity. The model is based on a novel functional block diagram, focusing more on the information theoretical nature of human contrast sensitivity. At the same time, several other aspects of human vision are also considered. In order to obtain an estimate of the nonlinear projection of the retinal image, the numerical results of Drasdo and Fowler were used. Cone density measurements along the major meridians of the retina, performed by Curcio & Allen, were also used. Retinal midget ganglion cell receptive field density was extended to the far periphery, based on the results of Drasdo and colleagues and Curcio & Allen. Considering cell densities and optical properties of the human eye, the low-pass filtering components of human contrast sensitivity have been characterized by a simple but adequate mathematical formula. The high-pass filtering of neural origin was also estimated based on midget receptive field densities as well as other experimental results. Further models are presented for the calculation of photon noise, neural noise and spatial integration, according to the previous results in the literature. The model presented in this paper has been validated by several experimental measurements, both for foveal and peripheral vision, at several luminance levels and experimental set-ups. Results were shown to be better fitting than the model of Barten [2] and Rovamo et al [37].

Original languageEnglish
Title of host publicationISCIII '09 - 4th International Symposium on Computational Intelligence and Intelligent Informatics, Proceedings
Pages93-99
Number of pages7
DOIs
Publication statusPublished - dec. 28 2009
EventISCIII '09 - 4th International Symposium on Computational Intelligence and Intelligent Informatics - Luxor, Egypt
Duration: okt. 21 2009okt. 25 2009

Publication series

NameISCIII '09 - 4th International Symposium on Computational Intelligence and Intelligent Informatics, Proceedings

Other

OtherISCIII '09 - 4th International Symposium on Computational Intelligence and Intelligent Informatics
CountryEgypt
CityLuxor
Period10/21/0910/25/09

ASJC Scopus subject areas

  • Artificial Intelligence
  • Computational Theory and Mathematics
  • Information Systems
  • Software

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    Roka, A., Galambos, P., & Baranyi, P. (2009). Contrast sensitivity model of the human eye. In ISCIII '09 - 4th International Symposium on Computational Intelligence and Intelligent Informatics, Proceedings (pp. 93-99). [5342274] (ISCIII '09 - 4th International Symposium on Computational Intelligence and Intelligent Informatics, Proceedings). https://doi.org/10.1109/ISCIII.2009.5342274