Three types of method were tested for calculating the variance: an uncorrelated estimate which used Equation ("Uncorrelated Estimate", equivalent to White's original MSER), window methods using Equation 19 with window sizes 5, 50, and N n 0 , and initial sequence methods based on Geyer's initial positive, monotone, and convex sequence rules. We tested the N n 0 window size due to its use in selecting batch and window sizes for variance estimation. We use triangular windows of the form