Abstract

We define a grain modulation transfer function (MTF) using unstructured grain images. This MTF is found to be similar in shape to the sine-wave MTF, but about 1/25 as sensitive. The higher sensitivity of the one-dimensional sine-wave grating is due to its highly structured pattern. In a second experiment, the results show that no simple unichannel linear model of vision can explain the visibility of the grain images. However, the results are consistent with a simple multichannel linear model.

© 1973 Optical Society of America

Effect of spatial frequency on the visibility of unstructured patterns

O. R. Mitchell
J. Opt. Soc. Am. 66(4) 327-332 (1976)

Invariance of visual receptive-field size and visual acuity with viewing distance

C. R. Cavonius and R. Hilz
J. Opt. Soc. Am. 63(8) 929-933 (1973)

Interaction of vision with optical aids*

Ian Overington
J. Opt. Soc. Am. 63(9) 1043-1049 (1973)

Image-detector model and parameters of the human visual system*

Alvin D. Schnitzler
J. Opt. Soc. Am. 63(11) 1357-1368 (1973)

Heterochromatic additivity, foveal spectral sensitivity, and a new color model*

Sherman L. Guth and Howard R. Lodge
J. Opt. Soc. Am. 63(4) 450-462 (1973)