HSC grz-band images of the unlensed galaxies, quasars, and stars as the negatives, along with the mock lenses as the positive examples. The square-root stretching is applied to the cutouts with a size of 72 × 72 pixels (≈12″ on a side) to emphasize features with low fluxes and improve the visual appearance. We also present the ground-truth labels and the estimated lens probability for each source in the figure.