Detection images produced by the software. Detection images from the analysis with DeTeCt3.1 of video observation of true impacts by (a) A.W., (b) C.G., (c) M.T., (d) M.I., (e) K.A., (f) G.H., (g) J.McK., (h) G.K., (i) T.R. Red-crosses are automatically generated by the software highlighting the impact detected in the photometry analysis. Green-crosses are automatically generated by the software analyzing the detection images. In robust detections, they point to the same location but sometimes only, the detection image finds the impact (h). In some cases of weak impacts or lower quality videos, none of the two methods find the impact (e) but a trained eye can distinguish a true impact in the detection image.