The Best Fit (BF) and Best Fit Recompensate (BFRE) constructed circles have the option of filtering the deviations of the measured data points from the best fit circle computed from the measured data.
Apply Gauss Filter - If you mark this check box, PC-DMIS applies a Gaussian filter with a cutoff frequency input as undulations per revolution (UPR). Generally, a lower cutoff frequency produces smoother filtered data.
Remove Outliers - If you mark this check box and you are filtering the data, it removes the outlier data prior to filtering.