Simple model for spatial-frequency masking and contrast discrimination

Peter G. J. Barten

doi:10.1117/12.207534

20 April 1995 Simple model for spatial-frequency masking and contrast discrimination

Peter G. J. Barten

Proceedings Volume 2411, Human Vision, Visual Processing, and Digital Display VI; (1995) https://doi.org/10.1117/12.207534
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

After some principal considerations about noise and the psychometric function,we present a model for the masking of a spatial frequency patten by nonwhite noise. From threshold elevation measurements by Stromeyer and Julesz, we derive a distribution function for the disturbing effect of one frequency on the detection of another frequency. We apply the resulting formulas on contrast sensitivity measurements with nonwhite noise by van Meeteren and Valeton. Next we use the same principles to derive a simple model for contrast discrimination. We consider the pedestal modulation as a nonwhite noise source of a single spatial frequency that hampers contrast detection. We show that contrast discrimination plots for different spatial frequencies will coincide if they are plotted in a normalized way. After a slight practical correction the model appears to be in very good agreement with measurements of various authors published in literature.

Citation Download Citation

Peter G. J. Barten "Simple model for spatial-frequency masking and contrast discrimination", Proc. SPIE 2411, Human Vision, Visual Processing, and Digital Display VI, (20 April 1995); https://doi.org/10.1117/12.207534

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