Fig. 7
Smoothing results. (a) Visual results. The blue boxplot corresponds to absence of smoothing, red dashing line – maximum obtained without smoothing, and blue dashed line – median. X-axis labels are smoothing values with corresponding filters written in parentheses. (b) OLS results for smoothing. Shades of green highlight significance, and the only combination that improves sensitivity and specificity (1D, GF 0.5). Shades of red represent severity of bad impact. Standard error (the standard deviation of the estimated Coefficient) for all rows is 0.00393. Summary: 1D, 2D and especially 3D smoothing generally lowers performance. 1D GF 0.5 is the sole configuration that delivers any accuracy gain, although its p-value is > 0.05.
