CN1885312A - Iris positioning method based on morphology and probability statistic - Google Patents
Iris positioning method based on morphology and probability statistic Download PDFInfo
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- CN1885312A CN1885312A CN 200610021366 CN200610021366A CN1885312A CN 1885312 A CN1885312 A CN 1885312A CN 200610021366 CN200610021366 CN 200610021366 CN 200610021366 A CN200610021366 A CN 200610021366A CN 1885312 A CN1885312 A CN 1885312A
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Abstract
本发明提供一种基于数学形态学和概率统计相结合的虹膜定位方法。它首先二值化虹膜图像,利用投影得到虹膜内圆粗定位圆心,然后用运用形态学进行边缘提取得到虹膜内圆的边缘,以内圆粗定位圆心(及其周围的点)到其边缘上每点的距离作为一个样本,从而将搜索圆心和半径三个参数转换为搜索最小均值的样本,而此样本的均值就是圆的半径。定出内圆后,用二值化和数学形态学方法得到外圆的边缘,然后以内圆圆心为外圆粗定位圆心,用定位内圆的方法定位外圆。采用本发明的虹膜定位方法,标准误差最小,精确度高,速度快。
The invention provides an iris positioning method based on the combination of mathematical morphology and probability statistics. It first binarizes the iris image, uses projection to obtain the iris inner circle and roughly locates the center of the circle, and then uses morphology to extract the edge of the iris inner circle, and uses the inner circle to roughly locate the center of the iris (and its surrounding points) to its edge every The distance of the point is used as a sample, so the three parameters of the search circle center and radius are converted into a sample of the minimum mean value, and the mean value of this sample is the radius of the circle. After the inner circle is determined, the edge of the outer circle is obtained by binarization and mathematical morphology, and then the center of the inner circle is used as the center of the outer circle to roughly locate the center of the outer circle, and the method of locating the inner circle is used to locate the outer circle. By adopting the iris positioning method of the invention, the standard error is the smallest, the precision is high, and the speed is fast.
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104408409A (en) * | 2014-11-12 | 2015-03-11 | 重庆大学 | Pupil location method suitable for astigmatic lens environment |
CN106204542A (en) * | 2016-06-29 | 2016-12-07 | 上海晨兴希姆通电子科技有限公司 | Visual identity method and system |
CN107315012A (en) * | 2017-06-22 | 2017-11-03 | 福建省万龙新材料科技有限公司 | Composite polycrystal-diamond end face collapses the intelligent detecting method at angle |
CN108256522A (en) * | 2018-01-09 | 2018-07-06 | 北京航空航天大学 | A kind of SPR and the two-dimentional recognition methods of waveguide blended absorbent spectrum signature position |
CN108846802A (en) * | 2018-01-25 | 2018-11-20 | 湖南省自兴人工智能研究院 | A kind of removal chromosomal G-banding mid-term gray level image Noise Method |
CN109766818A (en) * | 2019-01-04 | 2019-05-17 | 京东方科技集团股份有限公司 | Pupil center's localization method and system, computer equipment and readable storage medium storing program for executing |
CN110956590A (en) * | 2019-11-04 | 2020-04-03 | 中山市奥珀金属制品有限公司 | Denoising device and method for iris image and storage medium |
CN112183556A (en) * | 2020-09-27 | 2021-01-05 | 长光卫星技术有限公司 | Port ore heap contour extraction method based on spatial clustering and watershed transformation |
CN117291208A (en) * | 2023-11-24 | 2023-12-26 | 四川数盾科技有限公司 | Two-dimensional code extraction method and system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101539991B (en) * | 2008-03-20 | 2011-07-06 | 中国科学院自动化研究所 | Efficient Image Region Detection and Segmentation Method for Iris Recognition |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1209732C (en) * | 2002-10-09 | 2005-07-06 | 中国科学院自动化研究所 | Iris identifying method based on ripple analysis and zero passage description |
KR20050025927A (en) * | 2003-09-08 | 2005-03-14 | 유웅덕 | The pupil detection method and shape descriptor extraction method for a iris recognition, iris feature extraction apparatus and method, and iris recognition system and method using its |
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2006
- 2006-07-11 CN CNB2006100213662A patent/CN100351851C/en not_active Expired - Fee Related
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104408409A (en) * | 2014-11-12 | 2015-03-11 | 重庆大学 | Pupil location method suitable for astigmatic lens environment |
CN106204542B (en) * | 2016-06-29 | 2019-04-19 | 上海晨兴希姆通电子科技有限公司 | Visual identity method and system |
CN106204542A (en) * | 2016-06-29 | 2016-12-07 | 上海晨兴希姆通电子科技有限公司 | Visual identity method and system |
CN107315012A (en) * | 2017-06-22 | 2017-11-03 | 福建省万龙新材料科技有限公司 | Composite polycrystal-diamond end face collapses the intelligent detecting method at angle |
CN107315012B (en) * | 2017-06-22 | 2019-10-18 | 福建省万龙新材料科技有限公司 | Composite polycrystal-diamond end face collapses the intelligent detecting method at angle |
CN108256522B (en) * | 2018-01-09 | 2020-05-19 | 北京航空航天大学 | Two-dimensional identification method for SPR (surface plasmon resonance) and waveguide mixed absorption spectrum characteristic position |
CN108256522A (en) * | 2018-01-09 | 2018-07-06 | 北京航空航天大学 | A kind of SPR and the two-dimentional recognition methods of waveguide blended absorbent spectrum signature position |
CN108846802A (en) * | 2018-01-25 | 2018-11-20 | 湖南省自兴人工智能研究院 | A kind of removal chromosomal G-banding mid-term gray level image Noise Method |
CN109766818A (en) * | 2019-01-04 | 2019-05-17 | 京东方科技集团股份有限公司 | Pupil center's localization method and system, computer equipment and readable storage medium storing program for executing |
CN110956590A (en) * | 2019-11-04 | 2020-04-03 | 中山市奥珀金属制品有限公司 | Denoising device and method for iris image and storage medium |
CN110956590B (en) * | 2019-11-04 | 2023-11-17 | 张杰辉 | Iris image denoising device, method and storage medium |
CN112183556A (en) * | 2020-09-27 | 2021-01-05 | 长光卫星技术有限公司 | Port ore heap contour extraction method based on spatial clustering and watershed transformation |
CN112183556B (en) * | 2020-09-27 | 2022-08-30 | 长光卫星技术股份有限公司 | Port ore heap contour extraction method based on spatial clustering and watershed transformation |
CN117291208A (en) * | 2023-11-24 | 2023-12-26 | 四川数盾科技有限公司 | Two-dimensional code extraction method and system |
CN117291208B (en) * | 2023-11-24 | 2024-01-23 | 四川数盾科技有限公司 | Two-dimensional code extraction method and system |
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CN100351851C (en) | 2007-11-28 |
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Assignee: Zhongshan Giordon Audio Alarm Equipment Co., Ltd. Assignor: University of Electronic Science and Technology of China Contract record no.: 2010440000966 Denomination of invention: Iris positioning method based on morphology and probability statistic Granted publication date: 20071128 License type: Exclusive License Open date: 20061227 Record date: 20100721 |
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