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The detection of gratings in narrow‐band visual noise *
Author(s) -
Carter Barbara E.,
Henning G. Bruce
Publication year - 1971
Publication title -
the journal of physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.802
H-Index - 240
eISSN - 1469-7793
pISSN - 0022-3751
DOI - 10.1113/jphysiol.1971.sp009666
Subject(s) - grating , spatial frequency , optics , contrast (vision) , luminance , noise (video) , physics , diffraction grating , high contrast , materials science , computer science , artificial intelligence , image (mathematics)
1. The detectability of sinusoidal gratings comprised of either one or many cycles was measured in veiling luminances the spatial frequencies of which were either narrow‐ or broad‐band. 2. In narrow‐band noise, the single‐cycle grating was detected with approximately 0·6 log units less contrast than the many‐cycle grating. On the other hand when both broad‐band and narrow‐band noise were present, there was no measurable difference in the detectability of the two types of grating. 3. The results are interpreted as supporting the hypothesis of Campbell & Robson (1968) that spatially varying luminance patterns are processed by mechanisms selectively sensitive to limited ranges of spatial frequencies.