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Luminance cues constrain chromatic blur discrimination in natural scene stimuli

Sharman, Rebecca J.; McGraw, Paul V.; Peirce, Jonathan W.

Authors

Rebecca J. Sharman

Paul V. McGraw

Jonathan W. Peirce

Abstract

Introducing blur into the color components of a natural scene has very little effect on its percept, whereas blur introduced into the luminance component is very noticeable. Here we quantify the dominance of luminance information in blur detection and examine a number of potential causes. We show that the interaction between chromatic and luminance information is not explained by reduced acuity or spatial resolution limitations for chromatic cues, the effective contrast of the luminance cue, or chromatic and achromatic statistical regularities in the images. Regardless of the quality of chromatic information, the visual system gives primacy to luminance signals when determining edge location. In natural viewing, luminance information appears to be specialized for detecting object boundaries while chromatic information may be used to determine surface properties.

Journal Article Type Article
Publication Date Mar 22, 2013
Journal Journal of Vision
Electronic ISSN 1534-7362
Publisher Association for Research in Vision and Ophthalmology
Peer Reviewed Peer Reviewed
Volume 13
Issue 4
Article Number 14
Institution Citation Sharman, R. J., McGraw, P. V., & Peirce, J. W. (2013). Luminance cues constrain chromatic blur discrimination in natural scene stimuli. Journal of Vision, 13(4), doi:10.1167/13.4.14
DOI https://doi.org/10.1167/13.4.14
Publisher URL http://www.journalofvision.org/content/13/4/14.abstract
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf




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