Volume 6, Number 12, Article 4, Pages 1380-1395 doi:10.1167/6.12.4 http://journalofvision.org/6/12/4/ ISSN 1534-7362
Discrete color filling beyond luminance gaps along perceptual surfaces
Ryota Kanai
Psychonomics Division, Helmholtz Research Institute, Universiteit Utrecht, Utrecht, The Netherlands, & Division of Biology, California Institute of Technology, Pasadena, CA, USA
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Daw-An Wu
Division of Biology, California Institute of Technology, Pasadena, CA, USA
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Frans A. J. Verstraten
Psychonomics Division, Helmholtz Research Institute, Universiteit Utrecht, Utrecht, The Netherlands
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Shinsuke Shimojo
Division of Biology & Computation and Neural Systems, California Institute of Technology, Pasadena, CA, USA, & Human and Information Science Laboratory, NTT Communication Science Laboratories, Atsugi, Kanagawa, Japan
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Abstract

Perceived color at a point in space is not determined simply by the color directly stimulating the corresponding retinal position. Surface color is informed by flanking edge signals, which also serve to inhibit the intrusion of signals from neighboring surfaces. Spatially continuous local interactions among color and luminance signals have been implicated in a propagation process often referred to as filling-in. Here, we report a phenomenon of discrete color filling whereby color jumps over luminance gaps filling into disconnected regions of the stimulus. This color filling is found to be blocked at boundaries defined by texture. The color filling is also highly specific to the elements belonging to a common perceptual surface, even when multiple surfaces are transparently overlaid. Our results indicate that color filling can be governed by a host of visual cues outside the realm of first-order color and brightness, via their impact on perceptual surface segmentation and segregation.

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History
Received June 17, 2006; published December 5, 2006
Citation
Kanai, R., Wu, D.-A., Verstraten, F. A. J., & Shimojo, S. (2006). Discrete color filling beyond luminance gaps along perceptual surfaces. Journal of Vision, 6(12):4, 1380-1395, http://journalofvision.org/6/12/4/, doi:10.1167/6.12.4.
Keywords
filling-in, color, surface, perceptual fading, luminance gap
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