Illustration of the TP and FP counting process. Column 1 shows the detection map used to produce four different binary maps, thresholded at different intensity levels (Cols. 2–5), for the three algorithms (respectively STCM, C3PO, and C-LANDO from top to bottom). A fake companion was inserted at position ΔDec = 0.0 and ΔRA = −0.2. TPs and FPs are respectively shown in green and in red for the thresholds indicated in the titles of each image. Each red blob or point is counted as a single FP or TP, with blobs representing many connected pixels at the same binary intensity level.