Confusion matrices for the test set of galaxies at redshift zero, evaluated with threshold values of 0.5 (left), 0.75 (middle), and 0.85 (right). Each matrix corresponds to a subset of 105 test images. The top-left cell represents the true negative rate, the top-right cell the false positive rate, the bottom-left cell the false negative rate, and the bottom-right cell the true positive rate alongside the absolute counts (in parentheses). Further details on the performance metrics are provided in Table 1.