Iris recognition at a distance with expanded imaging volume
Ramkumar Narayanswamy, Paulo E. X. Silveira · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2006
The human iris is an attractive biometric due to its high discrimination capability. However, capturing good quality images of human irises is challenging and requires considerable user cooperation. Iris capture systems with large depth of field, large field of view and excellent capacity for light capture can help considerably in such scenarios. In this paper we apply Wavefront Coding to increase the depth of field without increasing the optical F/# of an iris recognition system when the subject is at least 2 meters away. This computational imaging system is designed and optimized using the spectral-SNR as the fundamental metric. We present simulation and experimental results that show the benefits of this technology for biometric identification.