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SPATIAL FREQUENCY TUNED COVARIANCE CHANNELS UNDERLYING SCOTOPIC CONTRAST SENSITIVITY

DAVID H. PETERZELL, BROOKE E. SCHEFRIN, STEPHEN J. TREGEAR, and JOHN S. WERNER

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Abstract

The processes underlying photopic contrast sensitivity functions (CSFs) have been modeled in terms of multiple channels selective for spatial frequency (De Valois & De Valois, 1988). The lowest frequency channel obtained foveally using stational sinusoidal gratings typically has its peak sensitivity near 1 c/deg (Greenlee et al. 1988; Peterzell & Teller, 1996, 2000; Tolhurst, 1973).

© 2000 Optical Society of America

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