October 2003
Volume 3, Issue 9
Free
Vision Sciences Society Annual Meeting Abstract  |   October 2003
Interactions of afterimages for orientation and color: New results force model revisions
Author Affiliations
  • Gregory Francis
    Purdue University
Journal of Vision October 2003, Vol.3, 599. doi:10.1167/3.9.599
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      Gregory Francis, Wade Schoonveld; Interactions of afterimages for orientation and color: New results force model revisions. Journal of Vision 2003;3(9):599. doi: 10.1167/3.9.599.

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

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Abstract

We describe experimental and modeling work related to a recently discovered orientation afterimage (Vidyasagar, et al, 1999). In this afterimage, sequential viewing of two orthogonally related patterns produces an afterimage of the first pattern. In recent work (Francis & Rothmayer, in press), we reported experimental measurements of this afterimage and modeled the effects with Grossberg's BCS-FCS theory. We now report new experimental results that both validate the basic explanation provided by the BCS-FCS theory and suggest that new mechanisms are required for the theory to remain consistent with the data. In particular, the experimental results suggest that the filling-in process in the FCS cannot be isotropic diffusion. We show how an alternative neural mechanism can account for our new results and continue to act much like diffusive filling-in for other contexts.

Francis, G., Schoonveld, W.(2003). Interactions of afterimages for orientation and color: New results force model revisions [Abstract]. Journal of Vision, 3( 9): 599, 599a, http://journalofvision.org/3/9/599/, doi:10.1167/3.9.599. [CrossRef] [PubMed]
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