期刊
SENSORS
卷 20, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/s20051308
关键词
biometric recognition; visible light iris images; image quality assessment; image covariates; quality filtering
资金
- Exzellenzstrategie des Bundes und der Lander (the Excellence Strategy of the German Federal and State Governments)
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [251654672-TRR 161]
- Research Council of Norway [221073]
Image quality is a key issue affecting the performance of biometric systems. Ensuring the quality of iris images acquired in unconstrained imaging conditions in visible light poses many challenges to iris recognition systems. Poor-quality iris images increase the false rejection rate and decrease the performance of the systems by quality filtering. Methods that can accurately predict iris image quality can improve the efficiency of quality-control protocols in iris recognition systems. We propose a fast blind/no-reference metric for predicting iris image quality. The proposed metric is based on statistical features of the sign and the magnitude of local image intensities. The experiments, conducted with a reference iris recognition system and three datasets of iris images acquired in visible light, showed that the quality of iris images strongly affects the recognition performance and is highly correlated with the iris matching scores. Rejecting poor-quality iris images improved the performance of the iris recognition system. In addition, we analyzed the effect of iris image quality on the accuracy of the iris segmentation module in the iris recognition system.
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