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Effect of pupil dilation on biometric iris recognition systems for personal authentication
Tanushree Singh1, Simi Zaka-Ur-Rab1, Shazia Arrin1
1Institute of Ophthalmology, Jawaharlal Nehru Medical College and Hospital, Aligarh Muslim University, Aligarh, Uttar Pradesh, India.
Indian Journal of Ophthalmology
|January 2, 2023
Summary
Pupil dilation does not hinder biometric iris recognition (BIR) systems. A study found 100% correct recognition rates after dilation, confirming BIR reliability for authentication.
Area of Science:
- Ophthalmology
- Biometrics
- Computer Science
Background:
- Biometric iris recognition (BIR) systems are crucial for personal authentication.
- Understanding factors affecting BIR accuracy, like pupil dilation, is essential.
Purpose of the Study:
- To investigate the impact of pupil dilation on the performance of a biometric iris recognition system.
- To assess the reliability of BIR for identification and authentication post-dilation.
Main Methods:
- A prospective cohort study involved 321 participants undergoing routine eye check-ups.
- Iris scans were captured using an IRITECH-MK2120U device, both before and after topical pupil dilation.
- Hamming distance and recognition status were recorded, with eyes evaluated for changes.
Main Results:
- All 321 enrolled eyes were successfully matched after dilation.
- Pupil size significantly affected Hamming distance (P <0.05).
- A 100% correct recognition rate was achieved post-dilation with no false matches or observed loss of iris texture.
Conclusions:
- Biometric iris recognition systems are reliable for identification and authentication even after pupil dilation.
- Topical pupil dilation does not impede the non-recognition of iris scans in BIR systems.
