September 2011
Volume 11, Issue 11
Vision Sciences Society Annual Meeting Abstract  |   September 2011
Object Surface Completion: Filling-Out by Incremental Filling-In
Author Affiliations
  • Bruno Breitmeyer
    Department of Psychology, University of Houston, USA
  • Jane Jacob
    Department of Psychology, University of Houston, USA
Journal of Vision September 2011, Vol.11, 1102. doi:
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      Bruno Breitmeyer, Jane Jacob; Object Surface Completion: Filling-Out by Incremental Filling-In. Journal of Vision 2011;11(11):1102.

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

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In two experiments we used bilateral and unilateral backward masking to investigate the time course of a a rectangular target's surface completion. Our results show in both the bilateral and unilateral masking conditions that surface completion proceeds as a “filling out” from the interior middle region of the target toward its edges. Both masking procedures yield similar estimates of a filling-out speed at about 25 deg/sec in retinal coordinates, a value about 20% of the filling-in speed reported in prior studies. Moreover, using the relationship (based on human cortical magnification estimates) between retinal distance and cortical distance, our results show that the cortical filling-out speed proceeds at about 0.4 m/sec. Using Watt's MIRAGE model, we offer an explanation of our results in terms of a spatiotemporal process of filling-out by progressive filling-in.


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