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SPATIAL FREQUENCY RANGE IN THE DETECTION PROCESS—1. NARROW BARS
Author(s) -
Brogan David
Publication year - 1985
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1985.tb00647.x
Subject(s) - spatial frequency , linearity , grating , sensitivity (control systems) , range (aeronautics) , acoustics , computer science , channel (broadcasting) , optics , physics , electronic engineering , telecommunications , materials science , engineering , composite material
— The effect upon the detectability of narrow bars of ideal low‐pass and high‐pass filters was investigated. The results indicate that for optimum detection of the stimulus, spatial frequency components up to about 10 c/deg need to be transmitted. Two models (a multi‐channel model, incorporating probability summation across spatial frequency, and a Grating Sensitivity Curve model) were used in attempting to fit the results. The multi‐channel model provided a more realistic fit, but both models ultimately failed because of non‐linearity in the summation of responses to frequency components.