June 2004
Volume 4, Issue 8
Free
Vision Sciences Society Annual Meeting Abstract  |   August 2004
The spatial spread of filling-in for afterimages produced from orthogonal pairs of stimuli
Author Affiliations
  • Justin M. Ericson
    Purdue University, USA
Journal of Vision August 2004, Vol.4, 482. doi:10.1167/4.8.482
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      Justin M. Ericson, Gregory Francis, Joshua M. Shive; The spatial spread of filling-in for afterimages produced from orthogonal pairs of stimuli. Journal of Vision 2004;4(8):482. doi: 10.1167/4.8.482.

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

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Abstract

Sequential viewing of two orthogonally related patterns produces an afterimage related to the first pattern (Vidyasagar, et al, 1999). Thus, viewing a horizontal grating and then a vertical grating produces an afterimage of a horizontal grating. Francis & Rothmayer (2003) interpreted this finding in terms of Grossberg's BCS-FCS theory. In this theory the afterimage percept is the result of color-complement after responses in the FCS system interacting with orientation after responses in the BCS system. The two types of after responses interact at a stage of neural filling-in to produce the afterimage percept. In the current experiments we introduced a gap running vertically through the horizontal grating. Observers were asked to report whether the afterimage had a visible gap between the left and right sides. When the gap was small (16 minutes of visual arc) observers reported seeing a gap in the afterimage only 22% of the time. As the gap increased in size observers were more likely to report seeing a gap in the afterimage (64% of the time for a gap of 45 minutes). We used these findings to parameterize a mechanism of filling-in that interpolates brightness information across the gap. The findings help identify the spatial range of the filling-in mechanism in this context.

Ericson, J. M., Francis, G., Shive, J. M.(2004). The spatial spread of filling-in for afterimages produced from orthogonal pairs of stimuli [Abstract]. Journal of Vision, 4( 8): 482, 482a, http://journalofvision.org/4/8/482/, doi:10.1167/4.8.482. [CrossRef]
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