Figure 6

Finger print map of the scale-space image of Figure4. Finger print map of the scale-space image of Figure 4 with intervals at layers k=40, 46, and 52, along with the graphs of the scale-space images (solid curve) and the second derivatives (dotted curve) for k=40, 46, and 52 from the bottom, respectively, where m^∗ + 3δ^∗, m^∗, and m^∗ − 3δ^∗ depicted by horizontal dotted lines in each of the graphs represented the corresponding baselines.