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  Masking effect produced by Mach bands on the detection of narrow bars of random polarity

Henning g, G., Hoddinott, K., Wilson-Smith, Z., & Hill, N. (2004). Masking effect produced by Mach bands on the detection of narrow bars of random polarity. Journal of the Optical Society of America A, 21(8), 1379-1387. doi:10.1364/JOSAA.21.001379.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-D813-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-4BBB-5
Genre: Journal Article

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Henning g, GB, Author
Hoddinott, KT, Author
Wilson-Smith, ZJ, Author
Hill, NJ1, 2, Author              
Affiliations:
1Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497795              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: Difficulties arise in measuring masking by Mach bands because very-low-contrast signals distort the bands. [J. Opt. Soc. Am. A 17, 1147 (2000).] Adding narrow luminance increments (bright bars) in the dark Mach band widens the dark band; adding decrements (dark bars) narrows the dark band, and conversely in the bright bands. Randomizing signal polarity prevents observers from using the distortion of the Mach bands as a cue to the presence of the signal. We measured (two-alternative–forced-choice) Mach bands’ masking of randomly selected bright (incremental) or dark (decremental) bars. Detection was worse in both dark and bright Mach bands than on the neighboring plateaus. Separate analysis of trials containing only one polarity signal revealed 9-cycle/deg oscillations in performance as a function of location. Oscillations in the two polarities were approximately 180° out of phase.

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 Dates: 2004-08
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: -
 Identifiers: BibTex Citekey: 2792
DOI: 10.1364/JOSAA.21.001379
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Title: Journal of the Optical Society of America A
Source Genre: Journal
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Publ. Info: Washington, D.C. : The Society
Pages: - Volume / Issue: 21 (8) Sequence Number: - Start / End Page: 1379 - 1387 Identifier: ISSN: 0740-3232
CoNE: https://pure.mpg.de/cone/journals/resource/954925538151_1