1. Daugman, J.G.: High confidence visual recognition of person by a test of statistical independence. IEEE Trans. PAMI 15, 1148–1161 (1993)
2. Daugman, J.: How iris recognition works. IEEE Trans. Circuits Syst. Video Technol. 14(1), 21–30 (2004)
3. Bowyer, K., Hollingsworth, K., Flynn, P.: Image understanding for iris biometrics: A survey. Tech. rep., University of Notre Dame, CSE (2007)
4. Narayanswamy, R., Silveira, P.E.X., Setty, H., Pauca, V.P., van der Gracht, J.: Extended depth-of-field iris recognition system for a workstation environment. In: Proceedings of SPIE Biometric Technology for Human Identification II, vol. 5779. Orlando, FL (2005)
5. van der Gracht, J., Pauca, V.P., Setty, H., Jr., E.R.D., Plemmons, R.J., Torgersen, T.C., Prasad, S.: Iris recognition with enhanced depth-of-field image acquisition. In: Proceedings of SPIE Defense and Security Symposium, vol. 5358. SPIE, Orlando, FL (2004)