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|Title:||Assessing 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.
Nascimento, Sérgio M. C.
|Publisher:||Optical Society of America|
|Journal:||Journal of the Optical Society of America A: Optics and Image Science, and Vision|
|Citation:||Linhares, 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.|
|Access:||Restricted access (UMinho)|
|Appears in Collections:||CDF - OCV - Artigos/Papers (with refereeing)|
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