ROC curve for a 5 mas minimum separation and a contrast of up to one magnitude. The curves for the single channel (e₁, e₂, and R², denoted N(e₁), N(e₂), and N(R²)) are shown along with the combined three-channel classifier (denoted ACF) and the RF method. All curves are colour-coded with the F₁ score computed at each threshold. The dashed line shows the performance of a random-guess algorithm. The numerical value in the legend is the AUC of the method.