Skip to main content
. Author manuscript; available in PMC: 2018 May 2.
Published in final edited form as: J Neural Eng. 2016 Apr 21;13(3):036009. doi: 10.1088/1741-2560/13/3/036009

Figure 8.

Figure 8

SNR quantifies information content in V1. (a) The total number of threshold crossings is plotted against orientation angle for a single channel at a threshold of θ = 1. (For visualization purposes, the data points are jittered around the true orientation angle.) Signal is defined as the variance of the mean number of threshold crossings across each orientation (orange). Noise is defined as the mean of the variance of the number of threshold crossings across each orientation (black). (b) The calculations are performed at each threshold for orientation (blue) and contrast (red). Signal and noise both vary with threshold setting. The orange dot highlights the values that come from the tuning curve in A. (c) Combining the relationships in B shows that SNR exhibits an inverted-U shaped relationship with threshold.