| 扩大焦深的虹膜采集方法及实现技术研究 |
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| 引用本文： | 李宏周,王华,任明放,丘伟,彭智勇. 扩大焦深的虹膜采集方法及实现技术研究[J]. 光电子技术, 2006, 26(4): 242-245 |
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| 作者姓名： | 李宏周 王华 任明放 丘伟 彭智勇 |
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| 作者单位： | 桂林电子科技大学通信与信息工程系;桂林电子科技大学信息材料科学与工程系,广西桂林,541004 |
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| 摘 要： | 针对传统的虹膜采集系统采集距离短、采集不灵敏的情况，在设计中通过在光学系统光路中加入一个特殊设计的非球面位相掩膜板，对非相干波前进行编码，使光学系统的MTF在一定范围内对离焦变化不敏感，经后期的图像处理，得到清晰的图片。实验表明，这种技术在保持图像质量的情况下，增大了采集的距离，提高了采集速度。
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| 关 键 词： | 虹膜识别 焦深扩大 位相掩膜板 采集 |
| 文章编号： | 1005-488X(2006)04-0242-04 |
| 收稿时间： | 2006-08-04 |
| 修稿时间： | 2006-08-04 |
Research on an Iris Capturing Technology by Extending the Depth of Focus |
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| LI Hong-zhou,WANG Hua,REN Ming-fang,QIU Wei,PENG Zhi-yong. Research on an Iris Capturing Technology by Extending the Depth of Focus[J]. Optoelectronic Technology, 2006, 26(4): 242-245 |
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| Authors: | LI Hong-zhou WANG Hua REN Ming-fang QIU Wei PENG Zhi-yong |
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| Affiliation: | 1. Department of Telecommunication and Information Engineering; 2. Department of , Information Material Science and Engineering ;Guilin University of Electronic Technology, Guilin , Guangxi , 541004, CHN |
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| Abstract: | In this paper, we describe a novel technology for iris capturing. This technology uses generalized aspheric optics to encode images,and the MTF of the optic system is invariant to defocus. A pleasing image is acquird by applying digital signal processing to decode the images. These new approaches can greatly improve the interfaces and decrease the system complexity. |
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| Keywords: | iris recognition extended depth-of-field phase mask plate capture |
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