Confusion matrix of Lens Detector 15 plotted for various thresholds. Class 0 represents the non-lensed images, and Class 1 represents the lensed images. Lower right: square in each confusion matrix represents the true positives for which Lens Detector 15 identified strong lenses correctly. Upper left: square in each confusion matrix represents the true negatives for which Lens Detector 15 identified non-strong lenses correctly. Lower left: square in each confusion matrix represents the false negatives or the missed true lenses by Lens Detector 15. Upper right: square in each confusion matrix represents the false positives or the non-lenses identified by Lens Detector 15 as strong lenses.