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

Algorithm 2

Procedure for boundary point selection algorithm.

(1) Use ten emitting rays with (for the other side ) to recover the boundary

   points for these angles by selecting points with maximal gradient on the rays.

(2) Determine distance threshold by taking the median value of the distance from these points to the

   pupillary center.

(3) Repeatedly do the following steps for a set of values even spaced within ():

  (A) Draw a new emitting ray based on

  (B) Collect a set of candidate points based on local maximal gradient. From this set, create a set of

    corresponding radiuses

  (C) Select the boundary point based on the equation:

  (D) Update with