Simulating human cones from mid-mesopic up to high-photopic luminances

J.H. van Hateren, H.P. Snippe

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Abstract

A computational model of human cones for intensities ranging from 1 td up to full bleaching levels is presented. The model conforms well with measurements made in primate horizontal cells, follows Weber's law at high intensities, and performs range compression consistent with what is known of cones in other vertebrates. The model consists entirely of processes with a clear physiological interpretation: pigment bleaching, saturation of cGMP hydrolysis, calcium feedback on cGMP synthesis, and a nonlinear membrane. The model is implemented according to a very fast computational scheme useful for simulations, and sample programs in Matlab and Fortran are provided as supplementary material.

Original languageEnglish
Article number1
Number of pages11
JournalJOURNAL OF VISION
Volume7
Issue number4
DOIs
Publication statusPublished - 2007

Keywords

  • cones
  • light adaptation
  • computational model
  • Weber's law
  • bleaching
  • LIGHT ADAPTATION
  • PRIMATE CONES
  • BLEACHING EXPOSURES
  • PHOTOTRANSDUCTION
  • SENSITIVITY
  • RETINA
  • PHOTORECEPTORS
  • MECHANISMS
  • RESPONSES
  • KINETICS

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