Figure 6:

The probability $P\left[{\sup }_{\mathbf{s}\in \partial A_c}|ϵ(\mathbf{s})/\sigma (\mathbf{s})|\le a\right]$ (the horizontal axis shows a) and approximations of it via the multiplier bootstrap or Taylor’s method based on a sample of size n. Here, the error field ϵ(s) has the distribution described in Noise 1 and A_c = A_c(μ) for the function μ shown in Figure 3a.