The same is solved by rotating the image in a fixed direction and aligning both models in the matching phase. 3.2 Implementation The Daugman rubber sheet model technique was adopted for normalization. The reference point is the center of the pupil and it is assumed that the radial vectors pass from the center to the border of the iris. Numerous characteristic points are selected on these vectors. The number of points on the radial line is called radial resolution and along the angular line is called angular resolution. A remapping function is used to resize the points on the corner lines. A fixed number of points are taken on each radial vector. The Cartesian coordinates that form the normalized model are traced back to obtain the radial and angular positions. The size of the rubber sheet was taken as 10 pixels on the radial vector and 40 on the angular vector. 3.3 Result The Daugman rubber sheet model was successfully implemented and the images were normalized. However, the process was not able to reconstruct the exact pattern as the levels of pupil dilation varied. Relational consistencies were not addressed at this stage, so various normalized samples appeared misaligned. This issue is addressed in matching