Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/43971

TitleAssessing the effects of dynamic luminance contrast noise masking on a color discrimination task
Author(s)Linhares, João M. M.
João, Catarina Alexandra Rodrigues
Silva, Eva D. G.
de Almeida, Vasco M. N.
Santos, Jorge L. A.
Álvaro, Leticia
Nascimento, Sérgio M. C.
Issue date2016
PublisherOptical Society of America
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
CitationLinhares, J. M. M., Joao, C. A. R., Silva, E. D. G., de Almeida, V. M. N., Santos, J. L. A., Alvaro, L., & Nascimento, S. M. C. (2016). Assessing the effects of dynamic luminance contrast noise masking on a color discrimination task. Journal of the Optical Society of America a-Optics Image Science and Vision, 33(3), A178-A183. doi: 10.1364/josaa.33.00a178
Abstract(s)The aim of this work was to assess the influence of dynamic luminance contrast noise masking (LCNM) on color discrimination for color normal and anomalous trichromats. The stimulus was a colored target on a background presented on a calibrated CRT display. In the static LCNM condition, the background and target consisted of packed circles with variable size and static random luminance. In the dynamic LCNM condition, a 10 Hz square luminance signal was added to each circle. The phase of this signal was randomized across circles. Discrimination thresholds were estimated along 20 hue directions concurrent at the color of the background. Six observers with normal colorvision, six deuter anomalous observers, and three prot anomalous observers performed the test in both conditions. With dynamic LCNM, thresholds were significantly lower for anomalous observers but not for normal observers, suggesting a facilitation effect of the masking for anomalous trichromats.
TypeArticle
URIhttp://hdl.handle.net/1822/43971
DOI10.1364/JOSAA.33.00A178
ISSN1084-7529
1520-8532
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - OCV - Artigos/Papers (with refereeing)

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