Recall, precision, and F₁ score for the brightness intensity threshold used to perform EB detection in SDO/AIA. The metric scores are shown as a function of the applied intensity threshold. The units of the thresholds is the number of standard deviation values (σ) above the local quiet-Sun average. For comparison, dashed and solid red lines indicate the maximum F₁ score achieved by the FNN and CNN SDO models respectively. The gray vertical line indicates the threshold value suggested by Vissers et al. (2019b) at 5σ. These metrics have been computed using the test set.