• 1987 (Vol.1)

A model of orientation recognition mechanisms for the 3-bar two-grade optotypes

© 2015 D.S.Lebedev

Institute for Information Transmission Problems (Kharkevich Institute), RAS 127994 Moscow, B.Karetny per., 19

Received 21 Apr 2015

The model of orientation recognition mechanism for the 3-bar two-grade optotypes is presented. It could be easily implemented (realized) by means of simple neuronal nets. The essential virtue of the model is its capability, due to minor change of settings, to simulate behavior of the three categories of subjects responding differently to the low- frequency components in the stimulus spectrum. Another advantage of the model is that it doesn’t require using stimulus samples for recognition of their orientation.

Key words: human vision, visual acuity, two-grade optotypes, modeling of recognition

Cite: Lebedev D. S. Model mekhanizma raspoznavaniya orientatsii 3-polosnykh dvukhgradatsionnykh optotipov [A model of orientation recognition mechanisms for the 3-bar two-grade optotypes]. Sensornye sistemy [Sensory systems]. 2015. V. 29(4). P. 309-320 (in Russian).

References:

  • Лебедев Д.С., Белозеров А.Е., Рожкова Г.И. Оптотипы для точной оценки остроты зрения // Патент на изобретение No 2447826. Зарегистрировано в Государственном реестре изобретений РФ 20.04.2012. Приоритет 07.12.2010.
  • Рожкова Г.И., Белозеров А.Е., Лебедев Д.С. Измерение остроты зрения: неоднозначность влияния низкочастотных составляющих спектра Фурье оптотипов // Сенсорные системы. 2012. Т. 26. No 2. С. 160–171.
  • Рожкова Г.И., Грачева М.А., Лебедев Д.С. Оптимизация тестовых знаков и таблиц для измерения остроты зрения // “Невские горизонты-2014”. Материалы научной конференции офтальмологов. СПбГПМУ. СПб.: Политехника-сервис, 2014. С. 563–567.
  • Хьюбел Д. Глаз, мозг, зрение: М.: Мир, 1990. 239 с.
  • Browm N.A.P., Sparrow J.M., Shun-Shin G.A., Franklin S.L. The acuityscope: a resolution test target projection ophthalmoscope // Int. Ophthalmol. 1991. V 15. P. 139–142.
  • Anderson R.S., Thibos L.N. The relationship between acuity for gratings and for tumbling-E letters in peripheral vision // JOSA. 1999. V. 16. P. 2321–2333.
  • Bondarko V.M., Danilova M.V. What spatial frequency do we use to detect the orientation of a Landolt C? // Vision Res. 1997. V. 37. P. 2153–2176.
  • Daugman J.G. Two-dimensional spectral analysis of cortical receptive field profiles //Vision Res. 1980. V. 20. No. 10. P. 847–856.
  • ISO 8596. International Standard. Ophthalmic optics. Visual acuity testing. Standard optotype and its presentation. Geneve, 1994. (2nd edition: Geneve, 2009.)
  • ISO 8597. International Standard. Optics and optical instruments. Visual acuity testing. Method of correlating optotypes. Geneve, 1994.
  • Hubel D.H., Wiesel T.N. Receptive fields of single neurones in the cat’s striate cortex // J. Physiol. 1959. V. 148. No. 3. P. 574–591.
  • Hubel D.H., Wiesel T.N. Ferrier lecture: Functional architecture of macaque monkey visual cortex //Proc. Royal Soc. London B: Biological Sciences. 1977. V. 198. No. 1130. P. 1–59.
  • Rozhkova G., Lebedev D. Visual acuity measurement: Account of the optotype structure // Perception. 2013. V. 43, Suppl. P. 69.
  • Rozhkova G., Lebedev D., Gracheva M., Rychkova S. Advantages of employing specially modified 3-bar stimuli for visual acuity monitoring in adults and children: Test-retest reliability // Perception. 2014. V. 43, Suppl. P. 34
  • USAF-1951. United States Air Force 3-bar resolution test chart.
  • Watson A.B. Detection and recognition of simple spatial forms. Springer Berlin Heidelberg, 1983. P. 100–114.
  • Watson A.B., Ahumada A.J., Jr. A standard model for foveal detection of spatial contrast // J. Vision. 2005. V. 5. No 9. P. 717–740.