9 December 2005 Iris image acquirement and preprocessing in biometrics
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Proceedings Volume 6024, ICO20: Optical Devices and Instruments; 602414 (2005) https://doi.org/10.1117/12.666847
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
Abstract
As a biometrics, iris recognition is becoming an active topic in recent years. Due to constriction and dilation of iris sphincter muscle affected by illumination, iris images should be captured under steady illumination. The principles of our homemade iris capture device and real product are introduced first. This device can be used to capture fine iris images and store them into the computer. Due to changes of head orientation and binocular vergence at different iris acquirement time, a preprocessing method including iris location, normalization, image enhancement and rotation correction is then applied to achieve rotation, shift and scale invariance. Finally the correlation measurement is used to evaluate the performance of this processing.
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Xing Ming, Zhihui Li, Yuanning Liu, "Iris image acquirement and preprocessing in biometrics", Proc. SPIE 6024, ICO20: Optical Devices and Instruments, 602414 (9 December 2005); doi: 10.1117/12.666847; https://doi.org/10.1117/12.666847
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