February 2016
Volume 16, Issue 4
Open Access
OSA Fall Vision Meeting Abstract  |   February 2016
Brightness Assimilation Predicted Already at Retinal Level Due to the Effect of Wide Receptive-fields of Inhibitory Feedback Cells
Author Affiliations
  • Jihyun Kim
    Universitat Pompeu Fabra
  • Marcelo Bertalmío
    Universitat Pompeu Fabra
Journal of Vision February 2016, Vol.16, 44-45. doi:https://doi.org/10.1167/16.4.47
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Jihyun Kim, Marcelo Bertalmío; Brightness Assimilation Predicted Already at Retinal Level Due to the Effect of Wide Receptive-fields of Inhibitory Feedback Cells. Journal of Vision 2016;16(4):44-45. https://doi.org/10.1167/16.4.47.

      Download citation file:

      © ARVO (1962-2015); The Authors (2016-present)

  • Supplements

Brightness depends on the spatial scale of the inducers. For example using a disk-and-ring stimulus, Ried & Shapley (1988) showed that a larger width of ring (the inducer) induced strong brightness contrast to the disk (the inducee) compared to a narrower ring, and brightness of the disk in a narrower ring was instead affected much by the luminance of the background field (assimilation). From these results, the authors argued that brightness depends not only on the local contrast between the inducer (ring) and the inducee (disk) but also on long-range interaction among surfaces (disk and background) that produces assimilation, counteracting contrast effect. The spatial scale of the inducer affects relative contributions of contrast and assimilation on brightness computation. It was further argued that the local contrast is readily attributed to the retinal lateral inhibition (antagonistic center-surround processing), but the origin of long-range interaction was deemed uncertain and perhaps post-retinal. However, recent neurophysiological studies discovered that the retinal inhibitory feedback interneurons, horizontal cells (Packer & Dacey, 2005) and some amacrine cell types (Kolb, 1997), manifest spatially extended receptive-fields (wide RFs). We simulated Ried & Shapley's experiment in two different biophysical retinal model platforms (van Hateren, 2007; Wilson, 1997) in consideration of wide RF of interneurons and obtained results that qualitatively replicate their behavioral data. To the best of our knowledge this would be the first evidence that the local contrast and long-range surface interaction share the same neural locus and that brightness assimilation may already be taking place at retinal level.

Kolb H. 1997 Amacrine cells of the mammalian retina: Neurocircuitry and functional roles Eye 11 904 [CrossRef] [PubMed]
Packer O. J., Dacey D. M. 2005 Synergistic center-surround receptive field model of monkey H1 horizontal cells Journal of Vision 5 1038 [CrossRef] [PubMed]
Reid R. C., Shapley R. 1988 Brightness induction by local contrast and the spatial dependence of assimilation Vision Research 28 115 [CrossRef] [PubMed]
van Hateren J. H. 2007 A model of spatiotemporal signal processing by primate cones and horizontal cells Journal of Vision 7 1 [CrossRef] [PubMed]
Wilson H. R. 1997 A neural model of foveal light adaptation and afterimage formation Visual Neuroscience 14 403 [CrossRef] [PubMed]
 This work was supported by the European Research Council, Starting Grant ref. 306337, by the Spanish government, grant ref. TIN2012-38112, and by the Icrea Academia Award.

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.