| 一种快速的虹膜定位算法 |
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| 引用本文： | 贺力文.一种快速的虹膜定位算法[J].信息技术,2007,31(8):61-62,80. |
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| 作者姓名： | 贺力文 |
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| 作者单位： | 电子科技大学通信与信息工程学院,成都,610054 |
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| 摘 要： | 针对虹膜定位存在速度慢,外边缘模糊导致提取困难等问题,提出一种利用灰度直方图增强对比度,粗定位与精定位结合的三步定位算法。首先利用灰度投影粗定位出瞳孔圆心,再根据灰度直方图将图像二值化后,用算子提取边缘,然后通过粗略搜索缩小搜索范围,最后实现精确定位。试验表明,本算法减少了传统方法中搜索的盲目性,解决了外边缘定位效果不佳的问题,对图像质量要求不高,且快速有效,精度高。
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| 关 键 词： | 虹膜识别 虹膜定位 瞳孔 虹膜 |
| 文章编号： | 1009-2552（2007）08-0061-02 |
| 修稿时间： | 2006-12-11 |
A fast iris location algorithm |
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| HE Li-wen.A fast iris location algorithm[J].Information Technology,2007,31(8):61-62,80. |
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| Authors: | HE Li-wen |
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| Affiliation: | School of Communication and Information Engineering, UESTC, Chengdu 610054, China |
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| Abstract: | In order to improve the accuracy of locating iris exterior edge and the speed of iris localization,this paper proposed an improved algorithm basing on histogram equalization and coarse-to-fine localization.First,the coarse center of pupil is detected through the projection of image intensity in the binary image.Then,the fine center of pupil is found out by using a Roberts mask.Finally,the location of iris' outer edge can be finished in the similar way.Through the experiments,the algorithm is proved to be valid and efficient.Furthermore, this algorithm is not sensitive to the quality of iris image. |
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| Keywords: | iris recognition iris location pupil iris |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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