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A data hiding approach for the self-security of iris recognition

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Chinese Optics Letters 2008年第7期6卷 487-490页

作者：叶学义何志伟赵知劲 Laboratory of Pattern Recognition and Information Security Hangzhou Dianzi UniversityHangzhou 310018

Attacks to biometric data are the primary danger to the self-security of biometrics. To improve the iris feature template data security, a data hiding approach based on bit streams is proposed, in which an iris feature template is embedded into a face image. The proposed approach is applicable to present dominant techniques of iris recognition. With the low computation cost and the zero decoding-error-rate, this data hiding approach, embedding target biometrie data into other biometrie data for improving the security of target data in identity recognition, data storage and transmission, can deceive attackers more effectively. Furthermore, it does not degrade the iris recognition performances. Experimental results prove that the proposed approach can be used to protect iris feature templates and enhance the security of the iris recognition system itself.

关键词： iris Modulation techniques Pattern recognition Watermarking Wavelet transforms Wavelets

Embryology of iris sanguinea Donn ex Horn. and its systematic relationship

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Journal of Forestry Research 2019年第6期30卷 2007-2020页

作者： Lijuan Fan Karl H.Hasenstein Ling Wang College of Landscape Architecture Northeast Forestry UniversityHarbin 150040People’s Republic of China Department of Biology University of Louisiana at LafayetteLafayetteLA 70504USA

iris sangumea Dorm ex Horn. is a perennial cold-tolerant herbs of the iris genus of Iridaceae, which has a well-formed, bright color and adaptability. Through understanding the fl ower bud differentiation, Sporogenesis, gametogenesis, fertilization and embryogenesis of I. sangumea, we developed fl owering regulation and control breeding. I. sangumea fl ower bud differentiation was observed in April for 21 days; in this stage, the early differentiation process was slow, temperature was more than 5 °C, if the temperature is shorter than this, most fl ower bud will have no differentiation, and turn to vegetative growth; later differentiation is faster and required temperature is from 5 to 8 °C and gradually rose to 10-12 °C. The temperature in April plays the defi nitely role in the number of bud differentiation. Three stamina contain tetrasporangiate anthers and a glandular tapetum. The anther wall is composed of four cell layers inclduding the epidermis, the endothecium, one middle layer and the secretory tapetum. The type of anther wall development the dicotyledonous type. After pollen maturation, the anther wall forms a double-layer containing only epidermis and endothecium. Simultaneous cytokinesis is of the continuous type during meiosis of microspore mother cell results in a zygomorphous or tetragonal tetrad. Mature pollen grains are two-celled. I. sangumea ’s stylar canal is hollow, open type style, and the gynoecium has three carpels. The ovaries have axial placentas. The ovule is anatropous, bitegmic and crassinucellate. The primary sporogenous cell differentiates directly as the megaspore. The megaspore tetrads are linear, T-shaped or juxtaposed. Generally, the fi rst of the tetrad megaspores at the chalaza becomes functional while the other three degenerate. A mature embryo sac with seven cells and eight nuclei embryo sac is of the polygonum type. For dichogamy, the male gametophyte matures about 2 days earlier than the female gametophyte. The pollen tube e

关键词： iris sanguinea Donn ex Horn Flower bud diff erentiation Embryology

iris reactor core with thorium fuel

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Nuclear Science and Techniques 2011年第5期22卷 311-315页

作者： Alrwashdeh MOHAMMAD Department of Engineering physics Tsinghua University

This work is aimed at running the first iris reactor core with mixed thorium dioxide fuel（ThO2-UO2 and ThO2-PuO2）.Calculations are performed by using Dragon 4.0.4 and Citation *** results show the multiplication factor(Keff) for central and peripheral assemblies as a function of *** ensure the proliferation resistance,the value of 235U enrichment is iris core leads to high reserve of reactivity,which is compensated with an integral fuel burnable *** self-shielding of boron is in an iris reactor *** effect of increased enrichment to the burn-up rates,and burnable poison distribution on the reactor performance,are *** equipment used in traditional light water reactors is evaluated for designing a small unit iris reactor.

关键词：反应堆燃料钍燃料堆芯虹膜 ThO2 iris Keff 资讯系统

Auto-cortex of crystalline lens-induced iris neovascularization

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International Journal of Ophthalmology(English edition) 2012年第1期5卷 23-27页

作者： Lin Liu, Wen-Xin Zhang Guangzhou General Hospital of Guangzhou Military Command Guangzhou 510010 Guangdong Province China Zhongshan Ophthalmic Center Sun Yat-sen University Guangzhou 510060 Guangdong Province China

AIM:To investigate auto-cortex of crystalline lens induced iris neovascularization (INV). METHODS: Thirty-six eyes of 36 guinea-pigs were included and divided into three groups randomly in this cohort study. Group A: the right lens nucleus was extracted and the remaining cortical lens material was aspirated thoroughly.. Group B: the lens was removed and 30 mu L precipitated lens cortex was injected into the anterior chamber again. Group C: aspirated the lens cortex of the left eyes and inject them into the right anterior chambers about 10 mu L. Clinical changes were followed by slit-lamp examination and photograph. The eye balls were enucleated at the day of 2, 4, 7, 11, 13, 17 after operation. HE was used to detect the pathological changes. ' RESULTS:Group A:INV had not been observed until the end of empirical study. The stromal layer contained thick wall vessels, without expansion. Group B: All eyes developed INV. Postoperative (po) 7 days; the eyes developed intense and extensive INV. The vessels of iris expanded remarkably and neovascularization was observed erupting from it's lateral wall and stretching towards the anterior surface. Poll days, INV regressed gradually after lens cortex had been absorbed. Group C: Po four (4) days, new blood vessels liking red line were presented on the anterior surface of the iris and they were not obvious. CONCLUSION: Anterior chamber inside lens coriaceous can induce iris new blood vessels.

关键词： iris new vessels crystallins

Simplified pupilloplasty technique through a corneal paracentesis to manage small iris coloboma or traumatic iris defect

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Annals of Eye Science 2017年第1期2卷 140-145页

作者： Yong Yao Vishal Jhanji Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong Shantou 515041China Department of Ophthalmology and Visual Sciences The Chinese University of Hong KongHong Kong

Background:To report a new simplified surgical technique to manage small iris coloboma or traumatic iris ***:A new surgical technique in which simplified pupilloplasty technique through only a clear corneal paracentesis to manage the iris coloboma or traumatic iris defect within the 120°range was designed.A retrospective revision of the medical records of patients treated with this technique between the years 2013 and 2016 was *** eyes of six patients with iris coloboma or traumatic iris defect treated with this new technique were ***:All the operated eyes quickly recovered with central round pupil,negligible complications,inessential symptoms of photophobia and glare,and mild inflammation after a median follow-up time of 22 months(range:6-34 months).Conclusions:The simplified pupilloplasty technique presented here could be a good alternative for the management of small iris coloboma or traumatic iris defect.

关键词： iris pupilloplasty iris defect coloboma trauma

转炉出钢口闸板的新型红外摄像控制法iris

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钢铁 2002年第5期37卷 22-24,45页

作者： M.Borz P.Ortelt 奥钢联机电公司奥钢联钢铁公司

奥钢联机电公司开发了 iris新型红外摄像炉渣探测系统以尽量减少转炉出钢时的下渣量。与常规电磁探测系统相比具有许多优点。奥钢联林茨钢厂的所有 3台转炉都安装了该系统。

关键词： iris 红外摄像转炉出钢挡渣塞炉渣探测系统

Metastatic tumor to the iris and ciliary body as an initial sign of lung cancer: a case report

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Chinese Medical Journal 2005年第13期118卷 1131-1133页

作者： SUIRui-fang ZHAOJia-liang ZHANGShun-hua FENGRui-e CHENGGang-wei MAJian-min MAOJin DepartmentofOphthalmologyPekingUnionMedicalCollegeHospital ChineseAcademyofMedicalSciencesBeijing100730China DepartmentofPathologyPekingUnionMedicalCollegeHospital ChineseAcademyofMedicalSciencesBeijing100730China

The most common sites of lung cancer metastases are pleura, bone, brain,pericardium and liver. Tumor metastasis to the eye is a rare complication of lung cancer. Metastaticcancer to the ocular region most often involves the uveal tract, however, most uveal metastasesoccur in the posterior uvea, and iris metastases are relatively rare. We describe a patient withadenocarcinoma of the lung metastatic to the iris as the first clinical sign without symptoms oflung cancer.

关键词： metastatic tumor iris lung cancer

iris japonica和iris confusa杂种F_1花粉母细胞中的细胞融合现象

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四川大学学报（自然科学版） 2000年第S1期37卷 113-117页

作者：周永红颜济伍碧华四川农业大学小麦研究所四川都江堰市611830

对irisjaponica和irisconfusa杂种F1的小孢子发育过程进行细胞学观察 ,发现在花粉母细胞减数分裂前期I中 ,2 8.5%的细胞出现细胞融合现象 ,染色质增加的细胞占15.5% ,染色质减少的细胞占 13.0 % .中期I染色体配对频率高 ,平均有 13.90... 详细信息

对irisjaponica和irisconfusa杂种F1的小孢子发育过程进行细胞学观察 ,发现在花粉母细胞减数分裂前期I中 ,2 8.5%的细胞出现细胞融合现象 ,染色质增加的细胞占15.5% ,染色质减少的细胞占 13.0 % .中期I染色体配对频率高 ,平均有 13.90个二价体 ;后期I出现落后染色体 ;后期II基本正常 ,花粉育性为 76 % .细胞融合对整个花粉母细胞减数分裂的稳定性和有效性影响不大 ,细胞融合是一种自然发生现象 .

关键词： iris japonica iris confusa 杂种F_1 细胞融合减数分裂

Implementation of the Hough Transform for iris Detection and Segmentation

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Advances in Molecular Imaging 2019年第1期9卷 6-18页

作者： Francisco Javier Paulín-Martínez Alberto Lara-Guevara Rosa María Romero-González Hugo Jiménez-Hernández Facultad de Informática Universidad Autónoma de Querétaro Querétaro México

The iris is used as a reference for the study of unique biometric marks in people. The analysis of how to extract the iris characteristic information represents a fundamental challenge in image analysis, due to the implications it presents: detection of relevant information, data coding schemes, etc. For this reason, in the search for extraction of useful and characteristic information, approximations have been proposed for its analysis. In this article, it is presented a scheme to extract the relevant information based on the Hough transform. This transform helps to find primitive geometries in the irises, which are used to characterize each one of these. The results of the implementation of the algorithm of the Hough transform applied to the location and segmentation of the iris by means of its circumference are presented in the paper. Two public databases of iris images were used: UBiris V2 and CASIA-irisV4, which were acquired under the same conditions and controlled environments. In the pre-processing stage the edges are found from the noise elimination in the image through the Canny detector. Subsequently, to the images of the detected edges, the Hough transform is applied to the disposition of the geometries detected.

关键词： Image Processing iris Segmentation Hough Transform