Готові списки джерел за темами / Fast biometry

Добірка наукової літератури з теми "Fast biometry"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Fast biometry"

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Turczynowska, Magdalena, Katarzyna Koźlik-Nowakowska, Magdalena Gaca-Wysocka, and Andrzej Grzybowski. "Effective Ocular Biometry and Intraocular Lens Power Calculation." European Ophthalmic Review 10, no. 02 (2016): 94. http://dx.doi.org/10.17925/eor.2016.10.02.94.

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Анотація:
Since the introduction of phacoemulsification, cataract surgery has evolved remarkably. The use of premium intraocular lenses (IOLs) (aspheric, toric, multifocal), refractive lens exchange and patients after refractive surgery procedures require extremely precise clinical measurements and IOL calculation formulas to achieve desired postoperative refraction. For many years, ultrasound biometry has been the standard for measurement of ocular parameters. The introduction of optical biometry (fast and non-invasive) has replaced ultrasound methods and is now considered as the clinical standard for ocular biometry. Recently, several modern optical instruments have been commercially launched and there are new methods available, including the empirical, analytical, numerical or combined methods to determine IOL power. The aim of this review is to present current techniques of ocular biometry and IOL power calculation formulas, which will contribute to achieve highly accurate refractive outcomes.
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Herbadji, Abderrahmane, Zahid Akhtar, Kamran Siddique, Noubeil Guermat, Lahcene Ziet, Mohamed Cheniti, and Khan Muhammad. "Combining Multiple Biometric Traits Using Asymmetric Aggregation Operators for Improved Person Recognition." Symmetry 12, no. 3 (March 10, 2020): 444. http://dx.doi.org/10.3390/sym12030444.

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Анотація:
Biometrics is a scientific technology to recognize a person using their physical, behavior or chemical attributes. Biometrics is nowadays widely being used in several daily applications ranging from smart device user authentication to border crossing. A system that uses a single source of biometric information (e.g., single fingerprint) to recognize people is known as unimodal or unibiometrics system. Whereas, the system that consolidates data from multiple biometric sources of information (e.g., face and fingerprint) is called multimodal or multibiometrics system. Multibiometrics systems can alleviate the error rates and some inherent weaknesses of unibiometrics systems. Therefore, we present, in this study, a novel score level fusion-based scheme for multibiometric user recognition system. The proposed framework is hinged on Asymmetric Aggregation Operators (Asym-AOs). In particular, Asym-AOs are estimated via the generator functions of triangular norms (t-norms). The extensive set of experiments using seven publicly available benchmark databases, namely, National Institute of Standards and Technology (NIST)-Face, NIST-Multimodal, IIT Delhi Palmprint V1, IIT Delhi Ear, Hong Kong PolyU Contactless Hand Dorsal Images, Mobile Biometry (MOBIO) face, and Visible light mobile Ocular Biometric (VISOB) iPhone Day Light Ocular Mobile databases have been reported to show efficacy of the proposed scheme. The experimental results demonstrate that Asym-AOs based score fusion schemes not only are able to increase authentication rates compared to existing score level fusion methods (e.g., min, max, t-norms, symmetric-sum) but also is computationally fast.
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Taha, Mohammed A., and Hanaa M. Ahmed. "A fuzzy vault development based on iris images." EUREKA: Physics and Engineering, no. 5 (September 13, 2021): 3–12. http://dx.doi.org/10.21303/2461-4262.2021.001997.

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Анотація:
Biometric systems gather information from the person's biometric attributes, used extensively to authorize the individuals. Due to the obvious convenience of using specific individual traits such as face, fingerprints, palm veins, and irises, biometric authentication is becoming more common. In particular, Iris systems are in high demand for high-assurance applications, because they contain a broad feature set and remain stable. Authentication methods based on iris biometrics are now commonly used in a variety of fields. This is due to the fact that iris biometric authentication is both safer and more comfortable than conventional passwords. Template Security is a major concern in biometric systems. The template security mechanism ensures reusable, permanent, and un-linkable models. The Fuzzy Vault strategy is one of the most popular security schemes for Template protection. Fuzzy vault has demonstrated to be an effective protection method but lacks revocability and security attacks. This article introduced an improved fuzzy vault system. The improved fuzzy vault system was introduced, which uses more than one key to protect biometric data. Different keys make the search space more detailed. The additional key was used to encrypt vault data, which stopped the intruder from accessing the information on the person's biometry. The system was tested using CASIA.v1 and IITD.v1 datasets, and findings showed that the system ensures the protection and authentication of the iris templates without compromising performance. The proposed modification gave a 0.0 % False Accepted Rate (FAR) for both the dataset and False Rejected Rate (FRR), 0.14 % for CASIA v1 and 0.12 % for ITTD v1 False Rejected rate
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Behrensen, Maren. "Identity as convention: biometric passports and the promise of security." Journal of Information, Communication and Ethics in Society 12, no. 1 (March 4, 2014): 44–59. http://dx.doi.org/10.1108/jices-08-2013-0029.

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Анотація:
Purpose – The paper is a conceptual investigation of the metaphysics of personal identity and the ethics of biometric passports. The paper aims to discuss these issues. Design/methodology/approach – Philosophical argument, discussing both the metaphysical and the social ethics/computer ethics literature on personal identity and biometry. Findings – The author argues for three central claims in this paper: passport are not simply representations of personal identity, they help constitute personal identity. Personal identity is not a metaphysical fact, but a set of practices, among them identity management practices (e.g. population registries) employed by governments. The use of biometry as part of these identity management practices is not an ethical problem as such, nor is it something fundamentally new and different compared to older ways of establishing personal identity. It is worrisome, however, since in the current political climate, it is systematically used to deny persons access to specific territories, rights, and benefits. Originality/value – The paper ties together strands of philosophical inquiry that do not usually converse with one another, namely the metaphysics of personal identity, and the topic of identity in social philosophy and computer ethics.
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Rana, Humayan Kabir, Md Shafiul Azam, Mst Rashida Akhtar, Julian M. W. Quinn, and Mohammad Ali Moni. "A fast iris recognition system through optimum feature extraction." PeerJ Computer Science 5 (April 8, 2019): e184. http://dx.doi.org/10.7717/peerj-cs.184.

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Анотація:
With an increasing demand for stringent security systems, automated identification of individuals based on biometric methods has been a major focus of research and development over the last decade. Biometric recognition analyses unique physiological traits or behavioral characteristics, such as an iris, face, retina, voice, fingerprint, hand geometry, keystrokes or gait. The iris has a complex and unique structure that remains stable over a person’s lifetime, features that have led to its increasing interest in its use for biometric recognition. In this study, we proposed a technique incorporating Principal Component Analysis (PCA) based on Discrete Wavelet Transformation (DWT) for the extraction of the optimum features of an iris and reducing the runtime needed for iris template classification. The idea of using DWT behind PCA is to reduce the resolution of the iris template. DWT converts an iris image into four frequency sub-bands. One frequency sub-band instead of four has been used for further feature extraction by using PCA. Our experimental evaluation demonstrates the efficient performance of the proposed technique.
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Dey, Somnath, and Debasis Samanta. "Fast and accurate personal identification based on iris biometric." International Journal of Biometrics 2, no. 3 (2010): 250. http://dx.doi.org/10.1504/ijbm.2010.033389.

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Van Oort, Madison. "The Emotional Labor of Surveillance: Digital Control in Fast Fashion Retail." Critical Sociology 45, no. 7-8 (July 13, 2018): 1167–79. http://dx.doi.org/10.1177/0896920518778087.

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Анотація:
Rooted in critical labor studies and feminist surveillance studies, this article explores how big data and biometric surveillance impact fast fashion’s predominantly feminized and racialized workforce. Through ethnography and interviews, I find that automated flexible scheduling, a now widely documented phenomenon, not only disciplines just-in-time staff but also encourages additional forms of digital control—including biometric scanners and point-of-sale metrics. While the technologies described exhibit regular limitations, such as failure and vulnerability to sabotage, they nevertheless have the cumulative effect of exacerbating worker insecurity and reinforcing inequality. I argue that alongside the decline of interactive emotional service work in low-wage retail, emerges another kind of affective labor—that of working amid often invisible yet pervasive digital monitoring. I call this work “the emotional labor of surveillance.”
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Abiyev, Rahib Hidayat, and Koray Altunkaya. "Neural network based biometric personal identification with fast iris segmentation." International Journal of Control, Automation and Systems 7, no. 1 (February 2009): 17–23. http://dx.doi.org/10.1007/s12555-009-0103-1.

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Dobriban, E. "Fast closed testing for exchangeable local tests." Biometrika 107, no. 3 (February 10, 2020): 761–68. http://dx.doi.org/10.1093/biomet/asz082.

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Анотація:
Summary Multiple hypothesis testing problems arise naturally in science. This note introduces a new fast closed testing method for multiple testing which controls the familywise error rate. Controlling the familywise error rate is state-of-the-art in many important application areas and is preferred over false discovery rate control for many reasons, including that it leads to stronger reproducibility. The closure principle rejects an individual hypothesis if all global nulls of subsets containing it are rejected using some test statistics. It takes exponential time in the worst case. When the tests are symmetric and monotone, the proposed method is an exact algorithm for computing the closure, is quadratic in the number of tests, and is linear in the number of discoveries. Our framework generalizes most examples of closed testing, such as Holm’s method and the Bonferroni method. As a special case of the method, we propose the Simes and higher criticism fusion test, which is powerful both for detecting a few strong signals and for detecting many moderate signals.
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KOHN, ROBERT, and CRAIG F. ANSLEY. "Fast filtering for seasonal moving average models." Biometrika 73, no. 2 (1986): 522–24. http://dx.doi.org/10.1093/biomet/73.2.522.

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Більше джерел

Дисертації з теми "Fast biometry"

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Грушко, Ярослав Володимирович. "Система голосової біометрії, економна до обчислювальних ресурсів". Master's thesis, КПІ ім. Ігоря Сікорського, 2019. https://ela.kpi.ua/handle/123456789/32176.

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Анотація:
Мета даної роботи – створити економну до обчислювальних ресурсів систему голосової біометрії. Основною ціллю роботи стали побудова загальної схеми такої системи, визначення її компонент та оптимальних параметрів. Об’єктом дослідження даної магістерської дипломної роботи є розпізнавання голосу людини комп’ютером. Предмет дослідження – голосова біометрія, тобто голосове розпізнавання особи. Спроєктована система складається з трьох основних модулів. Перший модуль – це алгоритм отримання голосового відбитку MFCCs. Другий модуль – це класифікатор, який має навчатися голосовими відбитками отриманими за допомогою першого модуля. Третій, і останній, модуль є верифікатором, який вдруге (після класифікатора) перевіряє правильність визначення особи. Задля підбору параметрів було розроблено окрему систему. Виходячи з підібраних оптимальних параметрів було створено консольний додаток голосової біометрії на мові програмування python та окремий мобільний додаток на java. Точність консольного додатку на вибірці 80 зразків 40-ка різних дикторів склала 93%. При проходженні аутентифікації, коли оброблювалося 6 секунд промови, тривалість роботи консольного додатку склала 2 секунди. Виконано перший етап розроблення стартап-проєкту, а саме, виконано маркетинговий аналіз стартап-проекту.
The purpose of this work is to create a cost-effective system for voice biometrics. The main purpose of the work was to build a general scheme of such a system as well as determine its components and optimal parameters. The object of study of this master's work is the recognition of human voice by computer. The subject of the study is voice biometrics, ie voice recognition of the individual. Designed system contain three basic modules. The first module is the MFCCs, the algorithm that give off individual voiceprint. The second module is a classifier that has to learn the voiceprints obtained with the first module. The third, and last, module is the verifier, which for the second time (after the classifier) verifies the correct identification of the person. A separate system was developed for parameter selection. Based on the selected optimal parameters, console application of voice biometrics in the Python programming language and a separate java mobile application were created. The accuracy of the console application on a dataset of 80 samples of 40 different individuals was 93%. During authentication, when 6 seconds of speech were been processing, the duration of the console application working was 2 seconds. The first stage of the development of the startup project was completed, namely, the marketing analysis of the startup project was performed.
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Tobiášová, Nela. "Biometrie s využitím snímků duhovky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220868.

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Анотація:
The biometric techniques are well known and widespread nowadays. In this context biometry means automated person recognition using anatomic features. This work uses the iris as the anatomic feature. Iris recognition is taken as the most promising technique of all because of its non-invasiveness and low error rate. The inventor of iris recognition is John G. Daugman. His work underlies almost all current public works of this technology. This final thesis is concerned with biometry based on iris images. The principles of biometric methods based on iris images are described in the first part. The first practical part of this work is aimed at the proposal and realization of two methods which localize the iris inner boundary. The third part presents the proposal and realization of iris image processing in order to classifying persons. The last chapter is focus on evaluation of experimental results and there are also compared our results with several well-known methods.
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Osičková, Kristýna. "Zpracování snímků duhovky pro biometrické aplikace." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221348.

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Анотація:
Biometrics is a method of recognizing the identity of a person based on unique biological characteristics that are unique to each person. The methods of biometric identification is currently becoming increasingly widespread in various sectors. This work is focused on the identification of a person by iris images. The introductory section describes the principles of the well-known methods for biometric applications and the next part describes the design method and its implementation in Matlab. In the practical part, fast radial symmetry method is used for detection of pupil, from which it derives further image processing. Two dimensional discrete welvet transform is used here. The proposed algorithm is tested on databases CASIA-Iris- Interval and database IITD.
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Martins, Samuel Botter 1990. "A fast and robust negative mining approach for user enrollment in face recognition systems = Uma abordagem eficiente e robusta de mineração de negativos para cadastramento de novos usuários em sistemas de reconhecimento facial." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/275553.

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Анотація:
Orientadores: Alexandre Xavier Falcão, Giovani Chiachia
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação
Made available in DSpace on 2018-08-27T14:41:07Z (GMT). No. of bitstreams: 1 Martins_SamuelBotter_M.pdf: 4782261 bytes, checksum: 63cd58756e3fe70ffe625d42974b1a78 (MD5) Previous issue date: 2015
Resumo: Sistemas automáticos de reconhecimento de faces tem atraído a atenção da indústria e da academia, devido à gama de possíveis aplicações, tais como vigilância, controle de acesso, etc. O recente progresso em tais sistemas motiva o uso de técnicas de aprendizado em profundidade e classificadores específicos para cada usuário em cenários de operação não-controlado, que apresentam variações consideráveis em pose, iluminação, etc. Sistemas automáticos de reconhecimento de faces possibilitam construir bases de imagens anotadas por meio do processo de cadastramento de novos usuários. Porém, à medida que as bases de dados crescem, torna-se crucial reduzir o número de amostras negativas usadas para treinar classificadores específicos para cada usuário, devido às limitações de processamento e tempo de resposta. Tal processo de aprendizado discriminativo durante o cadastramento de novos indivíduos tem implicações no projeto de sistemas de reconhecimento de faces. Apesar deste processo poder aumentar o desempenho do reconhecimento, ele também pode afetar a velocidade do cadastramento, prejudicando, assim, a experiência do usuário. Neste cenário, é importante selecionar as amostras mais informativas buscando maximizar o desempenho do classificador. Este trabalho resolve tal problema propondo um método de aprendizado discriminativo durante o cadastramento de usuários com o objetivo de não afetar a velocidade e a confiabilidade do processo. Nossa solução combina representações de alta dimensão com um algoritmo que rapidamente minera imagens faciais negativas de um conjunto de minerção grande para assim construir um classificador específico para cada usuário, baseado em máquinas de vetores de suporte. O algoritmo mostrou ser robusto em construir pequenos e eficazes conjuntos de treinamento com as amostras negativas mais informativas para cada indivíduo. Avaliamos nosso método em duas bases contendo imagens de faces obtidas no cenário de operação não-controlado, chamadas PubFig83 e Mobio, e mostramos que nossa abordagem é capaz de alcançar um desempenho superior em tempos interativos, quando comparada com outras cinco abordagens consideradas. Os resultados indicam que o nosso método tem potencial para ser explorado pela indústria com mínimo impacto na experiência do usuário. Além disso, o algoritmo é independente de aplicação, podendo ser uma contribuição relevante para sistemas biométricos que visam manter a robustez à medida que o número de usuários aumenta
Abstract: Automatic face recognition has attracted considerable attention from the industry and academy due to its wide range of applications, such as video surveillance, access control, online transactions, suspect identification, etc. The recent progress in face recognition systems motivates the use of deep learning techniques and user-specific face representation and classification models for unconstrained scenarios, which present considerable variations in pose, face appearance, illumination, etc. Automatic face recognition systems make possible to build annotated face datasets through user enrollment. However, as the face datasets grow, it becomes crucial to reduce the number of negative samples used to train user-specific classifiers, due to processing constraints and responsiveness. Such a discriminative learning process during the enrollment of new individuals has implications in the design of face recognition systems. Even though it might increase recognition performance, it may affect the speed of the enrollment, which in turn may affect the user experience. In this scenario, it is important to select the most informative samples in order to maximize the performance of the classifier. This work addresses this problem by proposing a discriminative learning method during user enrollment with the challenges of not negatively affecting the speed and reliability of the process, and so the user experience. Our solution combines high-dimensional representations from deep learning with an algorithm for rapidly mining negative face images from a large mining set to build an effective classification model based on linear support vector machines for each specific user. The negative mining algorithm has shown to be robust in building small and effective training sets with the most informative negative samples for each given individual. We evaluate our approach on two unconstrained datasets, namely PubFig83 and Mobio, and show that it is able to attain superior performance, within interactive response times, as compared to five other baseline approaches that use the same classification scheme. The results indicate that our approach has potential to be exploited by the industry with minimum impact to the user experience. Moreover, the algorithm is application-independent. Hence, it may be a relevant contribution for biometric systems that aim to maintain robustness as the number of users increases
Mestrado
Ciência da Computação
Mestre em Ciência da Computação
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Silva, Andre Gracioso Peres da. "Estimativa da biomassa de lenho em povoamentos de Eucalyptus grandis baseada em estatísticas do perfil de dossel geradas por escaneamento a laser aerotransportado." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-07072014-141442/.

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Анотація:
Este trabalho contribui para a evolução dos métodos que lidam com a quantificação de biomassa em plantações florestais em grande escala. Mais especificamente, explora o potencial de novos métodos baseados em sistemas de escaneamento a laser aerotransportado (ALS) que produzem uma representação 3D da estrutura vertical e horizontal acima do solo em plantios de Eucalyptus spp. A abordagem assume que a biomassa acima do solo pode ser estimada de forma precisa quando o perfil vertical da altura do dossel e a área basal são bem conhecidos. Assim, quatro questões foram analisadas: (i) se a função de densidade probabilidade Weibull com dois parâmetros (escala ? e forma ?) consegue descrever com precisão a distribuição vertical de pontos gerada pela tecnologia ALS e gerar um perfil aparente de altura de dossel adequado em plantios de eucalipto; (ii) se quando gerada por tecnologia ALS, a proporção de retornos no subdossel e solo tem relação significativa e positiva com a variável área basal; (iii) qual a qualidade da predição de área basal e de biomassa seca de lenho quando são usadas como variáveis explicativas um percentil baixo de altura da nuvem ALS e o parâmetro de escala da distribuição Weibull ajustada para definir o perfil vertical do dossel; e (iv) qual a qualidade dos mapas de biomassa de lenho de plantios de eucaliptos quando produzidos a partir de dois métodos diferentes, um de interpolação de dados das parcelas de campo (krigagem ordinária) e outro que usa a nuvem de pontos ALS para calibrar as informações das parcelas de campo (regressão linear). Os resultados mostraram que a função Weibull de dois parâmetros ajustou com precisão adequada o perfil das alturas do plantio de eucalipto. Do ponto de vista prático, esse resultado reforça as estratégias de uso dos parâmetros da função Weibull (escala e forma) como métricas que caracterizam adequadamente a estrutura vertical dos povoamentos florestais. A estimativa de área basal em função da proporção de retornos no subdossel e no solo mostrou-se moderada (R² = 0.42 e rRMSE = 7.6%), sendo necessários mais estudos que investiguem essa relação. As predições de área basal e biomassa do lenho foram aprimoradas em função do parâmetro ? da função Weibull, usado como estimador de escala para as alturas do dossel (área basal, R² = 0.77 e rRMSE = 4.8% e biomassa do lenho, R² = 0.89 e rRMSE = 5.1%). As variáveis, percentil 30 e parâmetro de forma (?) da função Weibull, também produziram boas estimativas (R² = 0.82 para área basal e R² = 0.93 para biomassa de lenho). Os mapas de predição de biomassa de lenho mostraram-se mais precisos quando derivados a partir de dados ALS (rRMSE = 5.5% versus 12.7% na interpolação por krigagem ordinária).
This work contributes to the evolution of methods dealing with the quantification of biomass in large-scale forest plantations. More specifically, it explores the potential of new methods based on airborne laser scanning systems to produce a 3D representation of the vertical and horizontal structure of above ground Eucalyptus spp plantations. The approach assumes that above ground biomass can be precisely estimated when the vertical profile of canopy heights and basal area are well known. Thus, four questions are examined: (i) can the Weibull probability density function (pdf) with two parameters (? scale and ? shape) describe accurately the vertical distribution of points generated by the ALS technology and generate an adequate apparent profile of canopy heights for the eucalyptus plantation?; (ii) when generated by the ALS technology, is the proportion of understory returns to ground returns significantly and positively related with basal area?; (iii) how well are basal area and dry stem biomass predicted by models using low height percentile values of the ALS point cloud and the scale parameter of the Weibull distribution describing the vertical canopy profile?; and (iv) how accurate are stem biomass maps of the eucalyptus plantation when two different methods are used, one based on interpolation that uses sample plots information (ordinary kriging) and another that uses the ALS point cloud to calibrate the sample plot information (linear regression)? The results showed that the Weibull pdf with two parameters fitted with adequate accuracy the plantation\'s height profiles. From a practical standpoint, this result reinforces the strategies of using the Weibull parameters (scale and shape) as metrics that adequately characterize the vertical structure of forest stands. Basal area estimates derived from the proportion of understory and ground returns presented only moderated accuracy (R² = 0.42 e rRMSE = 7.6%) and more research is needed to investigate such relationship. Good results were obtained when basal area and stem biomass were fitted as a function of the Weibull ? parameter, as a proxy for the scale of canopy heights (basal area, R² = 0.77 e rRMSE = 4.8%, and stem biomass, R² = 0.89 and rRMSE = 5.1%). The explanatory variables percentile 30 and the Weibull shape parameter (?) also produced good estimates (R² = 0.82 for basal area and R² = 0.93 for stem biomass). Stem biomass prediction maps showed to be more accurate when derived from ALS data (rRMSE = 5.5% against 12.7% derived from ordinary kriging interpolation).
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Laranja, Danitiele Cristina França. "Estudo de parâmetros populacionais de plantios clonais de Eucalyptus spp. a partir de nuvens de pontos obtidos com escaneamento a laser aerotransportado." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-09082016-165442/.

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As florestas plantadas contribuem para o desenvolvimento econômico, social e ambiental brasileiro, e o setor florestal busca plantios cada vez mais produtivos e melhor aproveitados. A tecnologia a laser aerotransportada (ALS - Airborne Laser Scanning), capaz de gerar informações tridimensionais precisas em extensas áreas e em pequeno intervalo de tempo, tem se destacado nas aplicações florestais, sendo utilizada na quantificação e caracterização de florestas. Neste estudo foram utilizados dados ALS obtidos em dois sobrevoos (2013 e 2014), cobrindo uma área de plantio do gênero Eucalyptus com diferentes clones e idades, localizada no estado de São Paulo. Esta dissertação é dividida em três partes. A primeira buscou avaliar a combinação de métricas ALS e de dupla amostragem nas estimativas de volume e na redução da intensidade amostral, comparando seus resultados aos de métodos amostrais tradicionais. Os resultados mostraram que a dupla amostragem obteve o menor erro de amostragem dentre os delineamentos, permitindo a redução do esforço amostral. A segunda parte visou caracterizar as diferenças estruturais existentes entre clones de eucalipto, com diferentes idades, a partir de métricas ALS e perfis de altura do dossel (CHP). O estudo mostrou que é possível distinguir a estrutura do dossel dos clones, o que pode contribuir com melhorias nas estimativas e no gerenciamento dos plantios comerciais. Na última parte, foram avaliados dois algoritmos de detecção de árvores individuais quanto à quantificação dos indivíduos e os efeitos da composição (tamanho de célula e filtragem) do modelo digital de alturas (CHM) no desempenho desses algoritmos. Verificou-se que as características do CHM influenciam na detecção. A estratégia com melhor desempenho resultou em um erro médio relativo de 11% no número de indivíduos.
Planted forests contribute to the economic, social and environmental development of Brazil, and the forest industry aims to increase productivity and the efficient use of these plantations. Airborne Laser Scanning (ALS) technology, capable of generating accurate three-dimensional information, covering large areas in a short time, has highlighted potential in forestry applications and has been applied in forests quantification and characterization. In this study, ALS data were obtained from two flights (2013 and 2014), covering a Eucalyptus plantation area with different clones and ages, in the state of São Paulo. This thesis comprises three parts. The first study aimed to evaluate the combination of ALS metrics and double sampling design for volume estimates and reducing sampling intensity, comparing the results to traditional sampling methods. Results showed that the double sampling had the lowest error from the designs, allowing the reduction of the sampling effort. The second part was proposed to characterize the structural differences between Eucalyptus clones with different ages, based on metrics ALS and canopy height profiles (CHP). The study showed that it is possible to distinguish the canopy structure of the clones, which can contribute to improvements in estimates and management of commercial plantations. In the last study, two individual tree detection algorithms were evaluated for quantification of individuals, and the effect of the canopy height model (CHM) composition at the performance of these algorithms was analyzed. It was found that the CHM characteristics influence the tree detection. The strategy with better performance resulted in an average relative error of 11% in number of trees.
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Rosa, Bruna Laurindo. "Desempenho e medidas corporais de tourinhos da raça Nelore alimentados com cana-de-açúcar e diferentes fontes de óleo /." Jaboticabal : [s.n.], 2010. http://hdl.handle.net/11449/96578.

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Resumo: O objetivou do trabalho foi comparar dietas enriquecidas com fontes de óleo sobre o desempenho, características de carcaça e medidas corporais de trinta e cinco tourinhos da raça Nelore, com média de 402 kg e 18 meses de idade, terminados em confinamento. Foram utilizadas cinco dietas experimentais, isoprotéicas (13,5%), sendo quatro delas isoenergéticas (76,5% NDT) e uma denominada de controle (71,5% NDT), todas com relação volumoso:concentrado de 40:60 na matéria seca, sendo a cana-de-açúcar forrageira IAC-86-2480 utilizada como fonte exclusiva de volumoso. Foram efetuadas quatro tomadas de imagens ultrassônicas e 14 mensurações no início e final de cada período experimental, totalizando quatro medições, juntamente com peso vivo. O delineamento utilizado foi blocos casualizados com 5 tratamentos e 7 repetições, sendo as médias comparadas por contrastes ortogonais, e foram estimadas correlações de Pearson entre as medidas corporais, características produtivas e post mortem dos animais. O ganho médio diário e o peso final foram maiores para as dietas com adição de óleo, independentemente da proteção (P<0,05). A taxa de eficiência protéica e eficiência alimentar foram menores (0,86 e 0,11; respectivamente) e a conversão alimentar foi pior (8,86) para a dieta controle em comparação aos demais tratamentos (média de 1,05; 0,14 e 7,30 respectivamente), que não diferiram entre si. As ingestões de extrato etéreo e matéria mineral foram maiores nos tratamentos com inclusão de óleo (P<0,05), e ainda para o extrato etéreo, houve interação significativa entre o tipo de óleo e proteção. Para as características de carcaça, os tratamentos com óleo se mostraram melhores, proporcionando carcaças mais pesadas e com melhores rendimentos (P<0,05). Os resultados mostraram melhora no desempenho geral dos animais com a adição de fontes energéticas na dieta ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The objectives of this study were to compare diets enriched with vegetable oil on performance, carcass characteristics and body measurements of thirty-five Nellore bulls with an average of 402 kg and 18 month old finished in feedlot. The five experimental diets used were isonitrogenous (13.5%), these four were isocaloric (76.5% TDN) and one called control (71.5% TDN), all with forage:concentrate ratio of 40:60 in the dry matter. The forage sugar cane IAC-86- 2480 was used as a single source of roughage. Four ultrasonic images and 14 body measurements were taken, at the beginning and at the end of each experimental period, together with the weights. The experimental design was a randomized blocks with 7 treatments, 5 replications and the means were compared by orthogonal contrasts estimated by Pearson's correlations between body measurements, production characteristics and post mortem characteristics of the bovines. The average daily gain and final weight were higher for diets with oil, regardless of the protection (P<0.05). The protein efficiency ratio and feed efficiency were lower (0.86 and 0.11, respectively) and feed conversion was worse (8.86) for the control diet compared to other treatments (mean 1.05, 0.14 and 7.30 respectively), which absence of statistical difference. The intake of ether extract and ash were higher in treatments with oil addition (P<0.05), and for lipids there were significant interaction between the type of oil and protection. For carcass characteristics, treatments with oil provided best carcasses weigths and higher incomes (P<0.05). The results showed improvements in overall performance of animals with the addition of energy sources in the diet, due to the increase in feed efficiency and weight gain. For measurements of loin eye area by ultrasound, were found positive associations with body length (0.32) of rump (0.36) and thigh (0.20), withers height (0.20) ... (Complete abstract click electronic access below)
Orientador: Alexandre Amstalden Moraes Sampaio
Coorientador: Wignez Henrique
Banca: Alexandre Rodrigo Mendes Fernandes
Banca: Telma Teresinha Berchielli
Mestre
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Ferreira, Leonardo. "Desempenho produtivo e caracter?sticas de carca?a de caprinos com diferentes composi??es raciais. 2010." Universidade Federal Rural do Rio de Janeiro, 2010. https://tede.ufrrj.br/jspui/handle/tede/558.

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Made available in DSpace on 2016-04-28T14:59:40Z (GMT). No. of bitstreams: 1 LeonardoFerreira PDF.pdf: 340498 bytes, checksum: 3f4802a4a87c81e1c9c6d8da02697789 (MD5) Previous issue date: 2010-02-24
This work was carried out aiming to evaluate the performance of purebred Anglo-Nubian and several Boer crossbreds (1/2 Boer + 1/2 Anglo-Nubian 1/2 BA and 3/4 Boer + 1/4 Undefined breed 3/4 BU) and male carcass features. 12 males and 12 females were confined and artificially milked twice a day with cow and goat milk, in rate of 1:1. From the second week on they received Tifton hay and concentrate, in rate of 40:60. They were weighed at birth and weekly early in the morning, before feeding. Zoometrical measurements were made in the morning even two weeks. The male kids were slaughtered between 20 and 25 kg of body weight. The crossbreds 3/4 BU were greater than others genetic groups in weight gain, denoting the Boer percentage influence in the crossbreds. However the crossbreds 1/2 BA weren?t greater than Anglo-Nubians purebred in weight gain. Therefore, the Boer genes percentage didn?t improvement the offspring results. The crossbred advantages in weigh at slaughter and empty body weight didn?t influence in carcass traits majority. Nevertheless, as bigger the Boer genes percentage, the fatter was the carcass. This may suggests a better carcass protection to cold shortening. The Hankins & Howe?s prediction equations, for carcass bovine evaluation, were not consistent to kid goats carcass. Was impossible to develop bone tissue prediction equation by HH section. On the other hand, the shoulder allowed a trustful prediction of tissue composition of carcass.
Este trabalho foi realizado objetivando avaliar o desempenho produtivo de cabritos e cabritas Anglo-Nubianos e mesti?os Boer x Anglo-Nubiana (1/2 BA) e 3/4 Boer + 1/4 sem ra?a definida (3/4 BS) e as caracter?sticas de carca?a dos machos. Utilizaram-se 12 cabritos e 12 cabritas, que foram mantidos totalmente confinados, sendo amamentados com leite de cabra e de vaca em uma propor??o de 1:1. A partir da segunda semana de idade os cabritos foram alimentados com feno de tifton e concentrado farelado, em uma rela??o de 40:60. Os animais foram pesados, ao nascimento e semanalmente pela manh?. As medi??es zoom?tricas foram realizadas quinzenalmente. Os cabritos foram abatidos com peso corporal entre 20 e 25kg. Os mesti?os 3/4 BS foram superiores aos demais grupamentos raciais no desenvolvimento ponderal, o que indicou a influ?ncia da composi??o racial Boer nos mesti?os. Entretanto tal superioridade n?o foi observada no comparativo entre os mesti?os 1/2 BA e os Anglo-Nubianos, denotando n?o ter havido melhoramento na F1 por influ?ncia do grau de sangue Boer. Os melhores resultados dos mesti?os Boer sobre os Anglo-Nubianos nos pesos ao abate e do corpo vazio n?o se refletiram na maior parte das caracter?sticas da carca?a. Contudo, o percentual Boer dos mesti?os determinou maior propor??o de gordura na carca?a, podendo indicar uma melhora na prote??o da carca?a em rela??o ao encurtamento pelo frio, no seu armazenamento em baixas temperaturas. As equa??es propostas por Hankins & Howe, para avalia??o de carca?as bovinas, n?o s?o compat?veis para carca?a de caprinos jovens. N?o foi poss?vel desenvolver equa??o de predi??o para propor??o do tecido ?sseo a partir da sec??o HH. Por outro lado, a utiliza??o da paleta possibilitou a predi??o confi?vel da composi??o tecidual da carca?a.
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Rosa, Bruna Laurindo [UNESP]. "Desempenho e medidas corporais de tourinhos da raça Nelore alimentados com cana-de-açúcar e diferentes fontes de óleo." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/96578.

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Made available in DSpace on 2014-06-11T19:28:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-02-09Bitstream added on 2014-06-13T20:18:02Z : No. of bitstreams: 1 rosa_bl_me_jabo.pdf: 926400 bytes, checksum: 859c4096d2cb3b818442d814b766e1ac (MD5)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O objetivou do trabalho foi comparar dietas enriquecidas com fontes de óleo sobre o desempenho, características de carcaça e medidas corporais de trinta e cinco tourinhos da raça Nelore, com média de 402 kg e 18 meses de idade, terminados em confinamento. Foram utilizadas cinco dietas experimentais, isoprotéicas (13,5%), sendo quatro delas isoenergéticas (76,5% NDT) e uma denominada de controle (71,5% NDT), todas com relação volumoso:concentrado de 40:60 na matéria seca, sendo a cana-de-açúcar forrageira IAC-86-2480 utilizada como fonte exclusiva de volumoso. Foram efetuadas quatro tomadas de imagens ultrassônicas e 14 mensurações no início e final de cada período experimental, totalizando quatro medições, juntamente com peso vivo. O delineamento utilizado foi blocos casualizados com 5 tratamentos e 7 repetições, sendo as médias comparadas por contrastes ortogonais, e foram estimadas correlações de Pearson entre as medidas corporais, características produtivas e post mortem dos animais. O ganho médio diário e o peso final foram maiores para as dietas com adição de óleo, independentemente da proteção (P<0,05). A taxa de eficiência protéica e eficiência alimentar foram menores (0,86 e 0,11; respectivamente) e a conversão alimentar foi pior (8,86) para a dieta controle em comparação aos demais tratamentos (média de 1,05; 0,14 e 7,30 respectivamente), que não diferiram entre si. As ingestões de extrato etéreo e matéria mineral foram maiores nos tratamentos com inclusão de óleo (P<0,05), e ainda para o extrato etéreo, houve interação significativa entre o tipo de óleo e proteção. Para as características de carcaça, os tratamentos com óleo se mostraram melhores, proporcionando carcaças mais pesadas e com melhores rendimentos (P<0,05). Os resultados mostraram melhora no desempenho geral dos animais com a adição de fontes energéticas na dieta...
The objectives of this study were to compare diets enriched with vegetable oil on performance, carcass characteristics and body measurements of thirty-five Nellore bulls with an average of 402 kg and 18 month old finished in feedlot. The five experimental diets used were isonitrogenous (13.5%), these four were isocaloric (76.5% TDN) and one called control (71.5% TDN), all with forage:concentrate ratio of 40:60 in the dry matter. The forage sugar cane IAC-86- 2480 was used as a single source of roughage. Four ultrasonic images and 14 body measurements were taken, at the beginning and at the end of each experimental period, together with the weights. The experimental design was a randomized blocks with 7 treatments, 5 replications and the means were compared by orthogonal contrasts estimated by Pearson's correlations between body measurements, production characteristics and post mortem characteristics of the bovines. The average daily gain and final weight were higher for diets with oil, regardless of the protection (P<0.05). The protein efficiency ratio and feed efficiency were lower (0.86 and 0.11, respectively) and feed conversion was worse (8.86) for the control diet compared to other treatments (mean 1.05, 0.14 and 7.30 respectively), which absence of statistical difference. The intake of ether extract and ash were higher in treatments with oil addition (P<0.05), and for lipids there were significant interaction between the type of oil and protection. For carcass characteristics, treatments with oil provided best carcasses weigths and higher incomes (P<0.05). The results showed improvements in overall performance of animals with the addition of energy sources in the diet, due to the increase in feed efficiency and weight gain. For measurements of loin eye area by ultrasound, were found positive associations with body length (0.32) of rump (0.36) and thigh (0.20), withers height (0.20) ... (Complete abstract click electronic access below)
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Christerson, Johan, and Jakob Kihlstrand. "Det rättsliga utrymmet för implementering av elektroniska underskrifter vid uppfyllandet av formkrav : En studie av formkraven." Thesis, Linköpings universitet, Filosofiska fakulteten, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150392.

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Elektroniska underskrifter är en relativt ny metod för att ingå bindande avtal. Tanken med tekniken är att den ska effektivisera, förenkla och öka säkerheten för användarna vid ingående av avtal. Det kan dock uppstå problem när lagstiftning anpassas till att reglera ny teknik, eftersom det är viktigt att lagstiftaren fortsätter att ta hänsyn till de skyddsintressen som ligger bakom gällande rätt. Denna uppsats belyser och diskuterar rättsliga hinder som föreligger vid användandet av elektroniska underskrifter, vid upprättande av de tre, privaträttsligt mest vanliga, rättshandlingarna som kräver en viss form för giltighet: överlåtelse av fast egendom, upprättande av testamente eller äktenskapsförord. Uppsatsen utreder hur den nya EU-förordningen eIDAS ((EU) nr 910/2014) har påverkat svenska myndigheters förhållningssätt till elektroniska underskrifter och elektroniska handlingar. Från presumtionen att det var fysiska handlingar som krävdes, om inte särskilda regler godkände elektroniska rutiner, till att elektroniska rutiner gäller om inte särskilda formkrav förbjuder det. Vidare förklaras förenklat tekniken bakom avancerade- och kvalificerade signaturer samt elektroniska dokument. Formkraven för skriftlighet, underskrift, bevittning och registrering och de skyddsintressen som ligger bakom dessa analyseras. Formkraven till ovan nämnda rättshandlingar kan till viss del tillgodoses med elektroniska signaturer och dokument, men i dagsläget krävs det en fysisk underskrift för att göra ovan nämnda rättshandlingar giltiga, på grund av den tolkning av begreppet underskrift som har gjorts i Ds 2003:29. Vidare analyseras hur sakrätten, rent teoretiskt, skulle kunna förändras genom en potentiell lagändring eller om en ny tolkning av begreppet underskrift medför att elektroniska signaturer kan användas vid överlåtelse av fast egendom. I uppsatsen diskuteras även de förtjänster och risker som en lagändring skulle kunna innebära, och hur dessa bör vägas mot varandra, för att sedan konstatera om en ökad implementering av elektroniska rutiner är önskvärd eller inte.
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Частини книг з теми "Fast biometry"

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Chatterjee, Amit, Puneet Singh, Vimal Bhatia, and Shashi Prakash. "Automated Fast Anti-Spoof Biometry Using Random Temporal History and Numerical Indexing Based Biospeckle Analysis." In Computational Mathematics, Nanoelectronics, and Astrophysics, 197–209. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9708-4_19.

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Hong, Danfeng, Xin Wu, Zhenkuan Pan, Jian Su, Weibo Wei, and Yaoyao Niu. "A Fast Robustness Palmprint Recognition Algorithm." In Biometric Recognition, 311–18. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-12484-1_35.

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Areekul, Vutipong, Ukrit Watchareeruetai, and Sawasd Tantaratana. "Fast Separable Gabor Filter for Fingerprint Enhancement." In Biometric Authentication, 403–9. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-25948-0_56.

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Li, Ling, and Jiangtao Wang. "Fast Head Detection Algorithm via Regions of Interest." In Biometric Recognition, 703–10. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46654-5_77.

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Abate, Andrea F., Michele Nappi, Fabio Narducci, and Stefano Ricciardi. "Fast Iris Recognition on Smartphone by means of Spatial Histograms." In Biometric Authentication, 66–74. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-13386-7_6.

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Xu, Yaowen, Lifang Wu, Yongluo Liu, and Zhuming Wang. "Embedding Fast Temporal Information Model to Improve Face Anti-spoofing." In Biometric Recognition, 437–45. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-86608-2_48.

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Wang, Gang, Weibo Wei, Zhenkuan Pan, Danfeng Hong, and Mengqi Jia. "Structural Feature Measurement Using Fast VO Model for Blurred Palmprint Recognition." In Biometric Recognition, 266–74. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-25417-3_32.

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Qin, Pei, Junxiong Gao, Shuangshuang Li, Chunyu Ma, Kaijun Yi, and Tomas Fernandes. "Binary Classifiers and Radial Symmetry Transform for Fast and Accurate Eye Localization." In Biometric Recognition, 30–39. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46654-5_4.

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Chuchvara, Aleksandra, Mihail Georgiev, and Atanas Gotchev. "A Framework for Fast Low-Power Multi-sensor 3D Scene Capture and Reconstruction." In Biometric Authentication, 40–53. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-13386-7_4.

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Mäenpää, Topi. "An Iterative Algorithm for Fast Iris Detection." In Advances in Biometric Person Authentication, 127–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11569947_16.

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Тези доповідей конференцій з теми "Fast biometry"

1

Gallego-Jutglà, Esteve, Saad Al-Baddai, Karema Al-Subari, Ana Maria Tomé, Elmar W. Lang, and Jordi Solé-Casals. "Face Recognition by Fast and Stable Bi-dimensional Empirical Mode Decomposition." In Special Session on Multivariable Processing for Biometric Systems. SCITEPRESS - Science and and Technology Publications, 2015. http://dx.doi.org/10.5220/0005337003850391.

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Patel, Snehal. "Fast search methods for biometric signal processing." In 2007 International Conference on Intelligent and Advanced Systems (ICIAS). IEEE, 2007. http://dx.doi.org/10.1109/icias.2007.4658585.

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Deshpande, Bhagyashree, and Deepak Jayaswal. "Fast and Reliable Biometric Verification System Using Iris." In 2018 Second International Conference on Inventive Communication and Computational Technologies (ICICCT). IEEE, 2018. http://dx.doi.org/10.1109/icicct.2018.8473300.

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Yan, Shilin, Shan Chang, Jiacheng Wang, and Shanila Azhar. "Using Pupil Light Reflex for Fast Biometric Authentication." In ACM TURC'20: ACM Turing Celebration Conference - China. New York, NY, USA: ACM, 2020. http://dx.doi.org/10.1145/3393527.3393551.

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Shenai, Shivani, Gaurav Patil, Vedant Sawant, Muskan Paryani, and Rupali Hande. "Fast Biometric Authentication System Based on Audio-Visual Fusion." In 2021 5th International Conference on Intelligent Computing and Control Systems (ICICCS). IEEE, 2021. http://dx.doi.org/10.1109/iciccs51141.2021.9432264.

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Passalis, G., I. A. Kakadiaris, T. Theoharis, G. Toderici, and T. Papaioannou. "Towards fast 3D ear recognition for real-life biometric applications." In 2007 IEEE Conference on Advanced Video and Signal Based Surveillance. IEEE, 2007. http://dx.doi.org/10.1109/avss.2007.4425283.

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Divakar, Meghana A. "Multimodal biometric system using index based algorithm for fast search." In 2016 2nd International Conference on Applied and Theoretical Computing and Communication Technology (iCATccT). IEEE, 2016. http://dx.doi.org/10.1109/icatcct.2016.7911957.

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Labati, Ruggero Donida, Angelo Genovese, Vincenzo Piuri, and Fabio Scotti. "Fast 3-D fingertip reconstruction using a single two-view structured light acquisition." In 2011 IEEE Workshop on Biometric Measurements and Systems for Security and Medical Applications (BIOMS). IEEE, 2011. http://dx.doi.org/10.1109/bioms.2011.6053684.

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Arrahmah, Annisa Istiqomah, Yudi Satria Gondokaryono, and Kyung-Hyune Rhee. "Fast non-random chaff point generator for fuzzy vault biometric cryptosystems." In 2016 International Conference on Frontiers of Information Technology (FIT). IEEE, 2016. http://dx.doi.org/10.1109/fit.2016.7857565.

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Murakami, Takao, and Kenta Takahashi. "Fast and accurate biometric identification using score level indexing and fusion." In 2011 IEEE International Joint Conference on Biometrics (IJCB). IEEE, 2011. http://dx.doi.org/10.1109/ijcb.2011.6117591.

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Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!

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