Comparison of mROC curves produced with and without using the velocity dimension, using otherwise the same dataset, at two contrast levels (4 × 10⁻⁴ and 2 × 10⁻⁴) and for a separation of 3–4 FWHM. In the cases where the velocity dimension is not used, illustrated with the purple and yellow dashed lines for C3PO and C-LANDO, respectively, the velocity dimension is replaced by the central velocity bin. This makes the comparison to STCM a little more balanced as STCM does not have the capability to use the velocity dimension. A final noteworthy point is that given the data dimensionality used by both the ML algorithms and STCM, it is truly fair to compare the solid blue line in Fig. 7 and the dashed lines produced by the ML algorithms, and we note the TPRs produced by the ML algorithms are higher; however, the FPs produced by C-LANDO are similar, when reducing the threshold, to those produced by STCM (FP = 3). We note that the solid curves remain the same as in Fig. 5.