
104
IrIs BIometrIC modeL
• e image taken, I, is stored in JPEG to gain more detail
(Figure7.2 shows the image quality).
• e distance, d, from the eye to the camera should be between
5 and 10 cm.
• e angle α should be less than 60°.
• e projectors should be installed next to the camera without
directly illuminating the eye to keep the ambient illumination
intensity stable.
e first three points are considered by most researchers. We have
adopted the fourth, concerning the installation of projectors, in order
to have better lighting.
We also determined the value of the distance, d, in terms of the
taken image, I, because the current system camera ...