Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
Volume 37, Issue 4, Pages A133-A144Publisher
Optica Publishing Group
DOI: 10.1364/JOSAA.380088
Keywords
-
Categories
Funding
- National Eye Institute [R01 EY 024239]
- Agence Nationale de la Recherche (DUAL_STREAMS) [ANR-11-IDEX-0007, ANR-11LABX-0042, ANR-15-CE32-0016, ANR-17-NEUC-0004, ANR-19-CE37-0000]
- Agence Nationale de la Recherche (ANR) [ANR-15-CE32-0016, ANR-17-NEUC-0004] Funding Source: Agence Nationale de la Recherche (ANR)
Ask authors/readers for more resources
Maximum likelihood difference scaling was used to measure suprathreshold contrast response difference scales for low-frequency Gabor patterns, modulated along luminance and L-M color directions in normal, protanomalous, and deuteranomalous observers. Based on a signal-detection model, perceptual scale values, parameterized as d', were estimated by maximum likelihood. The difference scales were well fit by a Michaelis-Menten model, permitting estimates of response and contrast gain parameters for each subject. Anomalous observers showed no significant differences in response or contrast gain from normal observers for luminance contrast. For chromatic modulation, however, anomalous observers displayed higher contrast and lower response gain compared to normal observers. These effects cannot be explained by simple pigment shift models, and they support a compensation mechanism to optimize the mapping of the input contrast range to the neural response range. A linear relation between response and contrast gain suggests a neural trade-off between them. (C) 2020 Optical Society of America
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available