Venn diagrams of the total number of each kind of detection for all six spectral windows of the Apertif test pointing by each source-finding method prior to applying the random forest classifier. (a) Number of detected mock galaxies. (b) Number of detected real sources. (c) Number of detected false positives. SoFiA is represented by the blue circle, MTO is represented by the orange circle, and the V-Net network is represented by the green circle.