Noise Provides New Insights on Contrast Sensitivity Function
Figure 5
Results of perceptual template model analysis and contrast sensitivity functions.
Column A: contrast sensitivity functions at zero (circle) and the highest external noise (triangle) levels are plotted as functions of spatial frequency; at zero external noise, the contrast sensitivity functions show a typical band-pass or low-pass profile. At high external noise, the contrast sensitivity functions have much lower amplitudes and don’t vary much with spatial frequency. Column B, C, D and E: Nadd, β, Nmul, and γ as functions of spatial frequency, respectively.