An Accurate and Efficient User Authentication Mechanism on Smart Glasses Based on Iris Recognition

Figure 7

Illustration of the proposed procedure (MIGREP) for outer boundary localization. (a) The input eye image and six radial emitting paths (plotted in green) along different angles. (b)~(g) The pixel intensity plots along the corresponding green path shown in (a). The red square denotes the position where the maximal gradient of intensity occurs. Those positions correspond to the intersection points between the outer boundary and the radial emitting path.