Abstract

Modulation thresholds have been measured for sine-wave gratings at various spatial frequencies. At low frequencies, the threshold is determined in part by the gradient between adjacent bright and dark bars. This is related to the effect of blurring the border between the bright and dark halves of a bipartite field; the results obtained with a sine-wave grating have been compared to the results obtained with a single border. An attempt has been made to isolate the roles played by optical blur and physiological spread of excitation and inhibition.

© 1969 Optical Society of America

Effects of average-luminance surrounds on the visibility of sine-wave gratings

John J. McCann and John A. Hall
J. Opt. Soc. Am. 70(2) 212-219 (1980)

Flickering Patterns and Lateral Inhibition*

D. H. Kelly
J. Opt. Soc. Am. 59(10) 1361-1370 (1969)

Sine-Wave Response of the Visual System. II. Sine-Wave and Square-Wave Contrast Sensitivity*†

J. J. Depalma and E. M. Lowry
J. Opt. Soc. Am. 52(3) 328-335 (1962)

Sine-Wave Response of the Visual System. I. The Mach Phenomenon*

E. M. Lowry and J. J. DePalma
J. Opt. Soc. Am. 51(7) 740-746 (1961)

Visibility of a Stabilized Target as a Function of Frequency and Amplitude of Luminance Variation*

Ulker Tulunay Keesey
J. Opt. Soc. Am. 59(5) 604-610 (1969)