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Modulation frequency and orientation tuning of second-order texture mechanisms
Optical Society of America. Journal A: Optics, Image Science, and Vision
Modulation frequency and orientation tuning of second-order mechanisms underlying the detection of modulation in local spatial-frequency information are assessed by using an oblique-masking paradigm. Stimuli were Gabor-filtered noise patterns in which the local carrier spatial frequency was modulated about an average value of 4.7 cycles per degree (cpd) according to a sinusoidal function. Thresholds were determined for spatial-frequency modulated test patterns (0.2 and 0.8 cpd) with fixeddoi:10.1364/josaa.16.000427 pmid:10069048 fatcat:xo6fymcyn5hufajs2uy4slslfe