Dissertations / Theses on the topic 'Fingerprints'
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Dimitrov, Emanuil. "Fingerprints recognition." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-5522.
Full textNowadays biometric identification is used in a variety of applications-administration, business and even home. Although there are a lot of biometric identifiers, fingerprints are the most widely spread due to their acceptance from the people and the cheap price of the hardware equipment. Fingerprint recognition is a complex image recognition problem and includes algorithms and procedures for image enhancement and binarization, extracting and matching features and sometimes classification. In this work the main approaches in the research area are discussed, demonstrated and tested in a sample application. The demonstration software application is developed by using Verifinger SDK and Microsoft Visual Studio platform. The fingerprint sensor for testing the application is AuthenTec AES2501.
Larsen, Vegard Andreas. "Combining Audio Fingerprints." Thesis, Norwegian University of Science and Technology, Department of Computer and Information Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8869.
Full textLarge music collections are now more common than ever before. Yet, search technology for music is still in its infancy. Audio fingerprinting is one method that allows searching for music. In this thesis several audio fingerprinting solutions are combined into a single solution to determine if such a combination can yield better results than any of the solutions can separately. The solution is used to find duplicate music files in a personal collection. The results show that applying the weighted root-mean square (WRMS) to the problem most effectively ranked the results in a satisfying manner. It was notably better than the other approaches tried. The WRMS produced 61% more correct matches than the original FDMF solution, and 49% more correct matches than libFooID.
Deng, Huimin. "Robust minutia-based fingerprint verification." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37036427.
Full textLlewelyn, Stephanie Jane. "Statistical modelling of fingerprints." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/7722/.
Full textVrábľová, Žofia. "Pokročilé generování artefaktů falzifikátů do syntetických otisků prstů." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445551.
Full textKuecken, Michael U. "On the formation of fingerprints." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/290075.
Full textSandström, Marie. "Liveness Detection in Fingerprint Recognition Systems." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2397.
Full textBiometrics deals with identifying individuals with help of their biological data. Fingerprint scanning is the most common method of the biometric methods available today. The security of fingerprint scanners has however been questioned and previous studies have shown that fingerprint scanners can be fooled with artificial fingerprints, i.e. copies of real fingerprints. The fingerprint recognition systems are evolving and this study will discuss the situation of today.
Two approaches have been used to find out how good fingerprint recognition systems are in distinguishing between live fingers and artificial clones. The first approach is a literature study, while the second consists of experiments.
A literature study of liveness detection in fingerprint recognition systems has been performed. A description of different liveness detection methods is presented and discussed. Methods requiring extra hardware use temperature, pulse, blood pressure, electric resistance, etc., and methods using already existent information in the system use skin deformation, pores, perspiration, etc.
The experiments focus on making artificial fingerprints in gelatin from a latent fingerprint. Nine different systems were tested at the CeBIT trade fair in Germany and all were deceived. Three other different systems were put up against more extensive tests with three different subjects. All systems werecircumvented with all subjects'artificial fingerprints, but with varying results. The results are analyzed and discussed, partly with help of the A/R value defined in this report.
Green, Nathan Alan. "Establishing Public Confidence in the Viability of Fingerprint Biometric Technology." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd919.pdf.
Full textSvoradová, Veronika. "Pokročilé generování projevů poškození do syntetických otisků prstů." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-445560.
Full textNoor, Azad. "A new algorithm for minutiae extraction and matching in fingerprint." Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/7473.
Full textDeng, Huimin, and 鄧惠民. "Robust minutia-based fingerprint verification." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37036427.
Full textSchütte, Moritz. "Evolutionary fingerprints in genome-scale networks." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2012/5748/.
Full textDie biologische Zelle ist ein sehr kompliziertes Gebilde. Bei ihrer Betrachtung gilt es, das Zusammenspiel von Tausenden bis Millionen von Genen, Regulatoren, Proteinen oder Molekülen zu beschreiben und zu verstehen. Durch enorme Verbesserungen experimenteller Messgeräte gelingt es mittlerweile allerdings in geringer Zeit enorme Datenmengen zu messen, seien dies z.B. die Entschlüsselung eines Genoms oder die Konzentrationen der Moleküle in einer Zelle. Die Systembiologie nimmt sich dem Problem an, aus diesem Datenmeer ein quantitatives Verständnis für die Gesamtheit der Wechselwirkungen in der Zelle zu entwickeln. Dabei stellt die mathematische Modellierung und computergestützte Analyse ein eminent wichtiges Werkzeug dar, lassen sich doch am Computer in kurzer Zeit eine Vielzahl von Fällen testen und daraus Hypothesen generieren, die experimentell verifiziert werden können. Diese Doktorarbeit beschäftigt sich damit, wie durch mathematische Modellierung Rückschlüsse auf die Evolution und deren Mechanismen geschlossen werden können. Dabei besteht die Arbeit aus zwei Teilen. Zum Einen wurde ein Modell entwickelt, dass die Evolution des Stoffwechsels nachbaut. Der zweite Teil beschäftigt sich mit der Analyse von Genexpressionsdaten, d.h. der Stärke mit der ein bestimmtes Gen in ein Protein umgewandelt, "exprimiert", wird. Der Stoffwechsel bezeichnet die Gesamtheit der chemischen Vorgänge in einem Organismus; zum Einen werden Nahrungsstoffe für den Organismus verwertbar zerlegt, zum Anderen aber auch neue Stoffe aufgebaut. Da für nahezu jede chemische Reaktion ein katalysierendes Enzym benötigt wird, ist davon auszugehen, dass sich der Stoffwechsel parallel zu den Enzymen entwickelt hat. Auf dieser Annahme basiert das entwickelte Modell zur Enzyme-Stoffwechsel-Koevolution. Von einer Anfangsmenge von Enzymen und Molekülen ausgehend, die etwa in einer primitiven Atmosphäre vorgekommen sind, werden sukzessive Enzyme und die nun katalysierbaren Reaktionen hinzugefügt, wodurch die Stoffwechselkapazität anwächst. Die Auswahl eines neuen Enzyms geschieht dabei in Abhängigkeit von der Ähnlichkeit mit bereits vorhandenen und ist so an den evolutionären Vorgang der Mutation angelehnt: je ähnlicher ein neues Enzym zu den vorhandenen ist, desto schneller kann es hinzugefügt werden. Dieser Vorgang wird wiederholt, bis der Stoffwechsel die heutige Form angenommen hat. Interessant ist vor allem der zeitliche Verlauf dieser Evolution, der mittels einer Zeitreihenanalyse untersucht wird. Dabei zeigt sich, dass neue Enzyme gebündelt in Gruppen kurzer Zeitfolge auftreten, gefolgt von Intervallen relativer Stille. Dasselbe Phänomen kennt man von der Evolution neuer Arten, die ebenfalls gebündelt auftreten, und wird Punktualismus genannt. Diese Arbeit liefert somit ein besseres Verständnis dieses Phänomens durch eine Beschreibung auf molekularer Ebene. Im zweiten Projekt werden Genexpressionsdaten von Pflanzen analysiert. Einerseits geschieht dies mit einem eigens entwickelten Cluster-Algorithmus. Hier läßt sich beobachten, dass Gene mit einer ähnlichen Funktion oft auch ein ähnliches Expressionsmuster aufweisen. Das Clustering liefert einige Genkandidaten, deren Funktion bisher unbekannt war, von denen aber nun vermutet werden konnte, dass sie enorm wichtig für das Wachstum der Pflanze sind. Durch Experimente von Pflanzen mit und ohne diese Gene zeigte sich, dass sechs neuen Genen dieses essentielle Erscheinungsbild zugeordnet werden kann. Weiterhin wurden Netzwerke der Genexpressionsdaten einer Pflanze, eines Pilzes und eines Bakteriums untersucht. In diesen Netzwerken werden zwei Gene verbunden, falls sie ein sehr ähnliches Expressionsprofil aufweisen. Nun zeigten diese Netzwerke sehr ähnliche und charakteristische Eigenschaften auf. Im Rahmen dieser Arbeit wurde daher ein weiteres evolutionäres Modell entwickelt, das die Expressionsprofile anhand von Duplikation, Mutation und Selektion beschreibt. Obwohl das Modell auf sehr simplen Eigenschaften beruht, spiegelt es die beobachteten Eigenschaften sehr gut wider, und es läßt sich der Schluss ziehen, dass diese als Resultat der Evolution betrachtet werden können. Die Ergebnisse dieser Arbeiten sind als Doktorarbeit in kumulativer Form bestehend aus vier veröffentlichten Artikeln vereinigt.
Kisel, Andrej. "Person Identification by Fingerprints and Voice." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20101230_093643-05320.
Full textPenkiose disertacijos darbo dalyse nagrinėjamos žmogaus identifikavimo pagal pirštų atspaudus ir balsą problemos ir siūlomi jų sprendimai. Pirštų atspaudų požymių išskyrimo algoritmų kokybės įvertinimo problemą siūloma spręsti panaudojant sintezuotus pirštų atspaudus. Darbe siūlomos žinomo pirštų atpaudų sintezės algoritmo modifikacijos, kurios leidžia sukurti piršto atspaudo vaizdą su iš anksto nustatytomis charakteristikomis ir požymiais bei pagreitina sintezės procesą. Pirštų atspaudų požymių palyginimo problemos yra aptartos ir naujas palyginimo algoritmas yra siūlomas deformuotų pirštų palyginimui. Algoritmo kokybė yra įvertinta ant viešai prieinamų ir vidinių duomenų bazių. Naujas asmens identifikavimo pagal balsą metodas remiantis tiesinės prognozės modelio grupinės delsos požymiais ir tų požymių palyginimo metrika kokybės prasme lenkia tradicinius asmens identifikavimo pagal balsą metodus. Pirštų ir balso įrašų nepriklausomumas yra irodytas ir asmens atpažinimas pagal balsą ir pirštų atspaudus kartu yra pasiūlytas siekiant išspręsti bendras biometrinių sistemų problemas.
Uzuner, Ozlem 1975. "Identifying expression fingerprints using linguistic information." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/30286.
Full textIncludes bibliographical references (leaves 181-192).
This thesis presents a technology to complement taxation-based policy proposals aimed at addressing the digital copyright problem. The approach presented facilitates identification of intellectual property using expression fingerprints. Copyright law protects expression of content. Recognizing literary works for copyright protection requires identification of the expression of their content. The expression fingerprints described in this thesis use a novel set of linguistic features that capture both the content presented in documents and the manner of expression used in conveying this content. These fingerprints consist of both syntactic and semantic elements of language. Examples of the syntactic elements of expression include structures of embedding and embedded verb phrases. The semantic elements of expression consist of high-level, broad semantic categories. Syntactic and semantic elements of expression enable generation of models that correctly identify books and their paraphrases 82% of the time, providing a significant (approximately 18%) improvement over models that use tfidf-weighted keywords. The performance of models built with these features is also better than models created with standard features used in stylometry (e.g., function words), which yield an accuracy of 62%. In the non-digital world, copyright holders collect revenues by controlling distribution of their works. Current approaches to the digital copyright problem attempt to provide copyright holders with the same kind of control over distribution by employing Digital Rights Management (DRM) systems.
(cont.) However, DRM systems also enable copyright holders to control and limit fair use, to inhibit others' speech, and to collect private information about individual users of digital works. Digital tracking technologies enable alternate solutions to the digital copyright problem; some of these solutions can protect creative incentives of copyright holders in the absence of control over distribution of works. Expression fingerprints facilitate digital tracking even when literary works are DRM- and watermark-free, and even when they are paraphrased. As such, they enable metering popularity of works and make practicable solutions that encourage large-scale dissemination and unrestricted use of digital works and that protect the revenues of copyright holders, for example through taxation-based revenue collection and distribution systems, without imposing limits on distribution.
by Özlem Uzuner.
Ph.D.
Spilsbury, Francis David. "Fish Fingerprints Signatures of Oil Contamination." Thesis, Curtin University, 2022. http://hdl.handle.net/20.500.11937/88429.
Full textHuvanandana, Sanpachai. "A framework for a fast fingerprint identification using a hybrid system /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/5927.
Full textDiefenderfer, Graig T. "Fingerprint recognition." Thesis, Monterey California. Naval Postgraduate School, 2006. http://hdl.handle.net/10945/2761.
Full textUS Navy (USN) author.
Goddard, Alex John. "Nanoscale observations of fingerprints on brass substrates." Thesis, University of Leicester, 2013. http://hdl.handle.net/2381/28145.
Full textCrawford, Michelle. "Fingerprints: exploration of identity, community and place." Thesis, Crawford, Michelle (2010) Fingerprints: exploration of identity, community and place. PhD thesis, Murdoch University, 2010. https://researchrepository.murdoch.edu.au/id/eprint/3430/.
Full textKHAN, SAHIB. "Efficient Image Clustering based on Camera Fingerprints." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2796754.
Full textNerakis, Eleftherios. "IPv6 host fingerprint." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FNerakis.pdf.
Full textThesis Advisor(s): Geoffrey Xie, John Gibson. "September 2006." Includes bibliographical references (p. 101-102). Also available in print.
Ransom, Emily Ann. "Fingerprints of Thomas More's Epigrammata on English Poetry." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-11122009-145232/.
Full textEchenique, Javier Jacobo. "Thrombotic fingerprints for the enhanced prediction of thrombosis." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39880.
Full textIncludes bibliographical references (leaves 111-114).
Controlled thrombosis initiates and regulates tissue repair and remodeling in the vessel wall. Processes from heart attack to stroke, and deep vein thrombosis to pulmonary embolism, are all derived from unrestricted clotting. The frustrating aspects of these diseases lie not only in the difficulty of their timely diagnosis, but in the selection of appropriate therapy, titration of intervention, and identification of patients at risk. Assays like the INR, PTT, and ACT can follow the course of specific pathways that govern activation of specific coagulation factors or platelet function, but they do not provide the insight into mechanism, risk and potential therapeutic benefit. We posit that elucidation of the complex dynamics of clot generation requires an integrated assessment that takes into account all of the factors driving thrombosis simultaneously. Virchow's Triad, has for years been identified as the three critical parameters of clot formation. We propose to examine an individual's clot propensity and response to therapy on minute blood samples, in virtual real time, across a range of flow rates, blood state, and wall conditions with the use of our newly developed in vitro high-throughput testing device.
(cont.) In this manner we will generate a unique thrombotic fingerprint that defines an individual's risk of clotting at a specific point in time over a range of stresses. This fingerprint can aid in tailoring therapeutic clinical treatments, determining the duration and dose of therapy, and assist in clinical trial management and establishment of clinical norms.
by Javier Jacobo Echenique.
S.M.
Rahbari, Hanif. "Obfuscation of Transmission Fingerprints for Secure Wireless Communications." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/612371.
Full textForbes, Peter G. M. "Quantifying the strength of evidence in forensic fingerprints." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:0915280a-22cc-429d-90dc-77f934d61dde.
Full textSapstead, Rachel Marie. "Characterizing electroactive polymer films : from fundamentals to fingerprints." Thesis, University of Leicester, 2014. http://hdl.handle.net/2381/28916.
Full textMucharla, Harindra Sai Tej, Raj Sekhar Sana, and Satyanarayana Namuduri. "Combination of Fingerprints for New Identity and Protection." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-17062.
Full textTANG, YANG. "BLOOD GENOMIC FINGERPRINTS OF NEUROLOGICAL DISEASES - MICROARRAY STUDIES." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1035831350.
Full textMassimiliani, Lorenzo. "Classification and clustering of video fingerprints: preliminary results." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22973/.
Full textSwaminathan, Ashwin. "Multimedia forensic analysis via intrinsic and extrinsic fingerprints." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8776.
Full textThesis research directed by: Dept. of Electrical and Computer Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Tang, Yang. "Blood genomic fingerprints of neurological diseases microarray studies /." Cincinnati, Ohio : University of Cincinnati, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin1035831350.
Full textRiach, Anna. "Using metabolic fingerprints to study insect-plant interactions." Thesis, University of York, 2014. http://etheses.whiterose.ac.uk/7149/.
Full textZhu, Yongfang. "Statistical models for fingerprint individuality." Diss., Connect to online resource - MSU authorized users, 2008.
Find full textTitle from PDF t.p. (viewed on Sept. 8, 2009) Includes bibliographical references (p. 112-115). Also issued in print.
Wong, Zilla Yin Har. "Molecular analysis of human minisatellites." Thesis, University of Leicester, 1990. http://hdl.handle.net/2381/34372.
Full textDean, Kristina. "Degradability of both a physical latent fingerprint and its associated extracted DNA." [Cedar City, Utah] : Southern Utah University, 2009. http://unicorn.li.suu.edu/ScholarArchive/ForensicScience/DeanKristina.pdf.
Full textBeecroft, Alexander J. "Passive fingerprinting of computer network reconnaissance tools." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Sep/09Sep%5FBeecroft.pdf.
Full textThesis Advisor(s): Michael, James B. "September 2009." Description based on title screen as viewed on November 04, 2009. Author(s) subject terms: Cyberspace defense, network defense, passive fingerprinting, computer network reconnaissance, network scanning, port scanning Includes bibliographical references (p. 67-69). Also available in print.
Späth, Bastian, Matthias Philipp, and Thomas Bartnitzki. "Machine performance and acoustic fingerprints of cutting and drilling." Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2018. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-231193.
Full textWales, Chris. "Identifying digital fingerprints in source code for authorship verification /." Leeds : University of Leeds, School of Computer Studies, 2008. http://www.comp.leeds.ac.uk/fyproj/reports/0708/Wales.pdf.
Full textHansson, Sophia V. "Incorporation and preservation of geochemical fingerprints in peat archives." Doctoral thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-84161.
Full textBeresford, Ann Louise. "The electrochromic enhancement of latent fingerprints on metal surfaces." Thesis, University of Leicester, 2013. http://hdl.handle.net/2381/28169.
Full textSpäth, Bastian, Matthias Philipp, and Thomas Bartnitzki. "Machine performance and acoustic fingerprints of cutting and drilling." TU Bergakademie Freiberg, 2017. https://tubaf.qucosa.de/id/qucosa%3A23182.
Full textFerber, Kristyn. "Quantifying the uniqueness of fingerprints from the same source." Thesis, Boston University, 2012. https://hdl.handle.net/2144/12375.
Full textIn 2009, the NAS published a report that was critical to forensic science, including the fingerprinting discipline. In particular, the report highlighted the fact that many of the claims made by LPEs are not backed up by scientific research. One of those claims is that if two fingerprints can be overlaid perfectly then one must be a copy. This study aims to provide research that will support or refute this claim and satisfy the demands of the NAS report. Additionally, this study was performed, in part, to show the ridge changes that occurred due to variations in pressure used when depositing a print on a surface. The study had 21 volunteers provide 10 sequentially laid fingerprints from the same finger. These prints were converted to a digital format. Each group's 10 fingerprints were individually overlaid onto each other in an effort to obtain the best possible agreement. Once this was done, the overlay percentage was determined. After all overlays were performed, additional data were collected to determine how ridge widths changed when there was a change in observable minutiae, presumably due to a decrease in the pressure used to generate the print. The data obtained indicate that, even when all variables other than the physical characteristic of the finger and the psychomotor capabilities of the volunteer are controlled, people are not able to generate prints that will perfectly overlay. Additionally, the data show that pressure distortion causes ridge widths to vary when prints are deposited. Moreover, minutiae loss in the print can also occur as a result of this type of distortion.
Hou, Jidong. "Ultrasonic signal detection and recognition using dynamic wavelet fingerprints." W&M ScholarWorks, 2004. https://scholarworks.wm.edu/etd/1539623437.
Full textMARTINEZ, VIDAL LAURA. "MICRO-MECHANICAL FINGERPRINTS OF BLADDER IN HEALTH AND DISEASE." Doctoral thesis, Università Vita-Salute San Raffaele, 2023. https://hdl.handle.net/20.500.11768/136519.
Full textTissue mechanics determines tissue homeostasis, disease development and progression. Bladder strongly relies on its mechanical properties to perform its physiological function, but these are poorly unveiled under normal and pathological conditions. In addition, the bladder is a multilayer organ and it is thus needed to understand tissue mechanics at the microscale, spatially resolving the different bladder layers and their contribution to altered tissue mechanics. This thesis aimed to characterize the micromechanical fingerprints of the healthy bladder wall, and to identify modifications associated with the onset and progression of pathological conditions of actinic cystitis and bladder cancer. To do so I used two indentation-based instruments (an Atomic Force Microscope and a nanoindenter) and compared the micromechanical maps with a comprehensive histological analysis. I found that the healthy bladder is a mechanically inhomogeneous tissue, with a gradient of increasing stiffness (in terms of Young’s modulus, YM) from the urothelium to the lamina propria, which gradually decreased when reaching the muscle layer. Stiffening in fibrotic tissues correlated with increased deposition of dense extracellular matrix in the lamina propria. An increase in tissue compliance was observed before the onset and invasion of the tumor. In addition, aiming to establish an experimental approach that would facilitate its application to the clinical environment, I here used Brillouin imaging to investigate healthy and fibrotic bladder, and confront the mechanical information from this non-contact technique to the gold-standard in nanomechanics (indentation-based mechanical tests). While Brillouin imaging reported the same mechanical trend observed by indentation-based mechanical tests when investigating intrinsic mechanical heterogeneities of the bladder wall, a decrease of Brillouin shift in fibrotic bladder was observed contrary to the increased YM measured by indentation-based mechanical tests, thus highlighting different physical phenomena detected by the different techniques and the need to further investigate correlations between both techniques. By providing high resolution micromechanical investigation of each tissue layer of the bladder, I here depicted the intrinsic mechanical heterogeneity of the layers of the healthy bladder as compared with the mechanical properties alterations associated with either actinic cystitis or bladder tumor; and provided an accurate comparison of the gold-standard technique in biomechanics to Brillouin imaging.
Gupta, Gaurav. "Models and protocols for evaluation of fingerprint sensors." Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4361.
Full textTitle from document title page. Document formatted into pages; contains vi, 78 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 71-75).
Bolton, John Lawson. "An evaluation of fingerprinting on registered nurse licensure rates in the state of Texas /." View online, 2006. http://ecommons.txstate.edu/arp/126/.
Full textCosta, Henrique Sérgio Gutierrez da. "Biometric identification with 3D fingerprints acquired through optical coherence tomography." reponame:Repositório Institucional da UFPR, 2016. http://hdl.handle.net/1884/44486.
Full textCoorientador : Profª. Olga Regina Pereira Bellon
Tese (doutorado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Programa de Pós-Graduação em Informática. Defesa: Curitiba, 28/06/2016
Inclui referências : f. 75-82
Área de concentração
Resumo: Um método para se obter impressões digitais 3D da derme e da epiderme a partir de imagens em alta resolução adquiridas utilizando Tomografia de Coerência Ótica (OCT) é proposto neste trabalho. Este método, resolve limitações das técnicas de reconstrução 3D de impressões digitais que empregam múltiplas câmeras/triangulação ou iluminação estruturada, tais como variações de resolução do centro para as bordas das impressões digitais 3D causadas por erros de reconstrução, sensibilidade a baixa iluminação e contraste insuficiente. Uma técnica de busca e identificação baseados em padrões inovativos, os "mapas KH " (usados para a segmentação de regiões de superfície em imagens de intensidade e de profundidade), extraídos computando as curvaturas Gaussiana (K) e média (H) de uma região de interesse na vizinhança das minúcias (denominada nuvem de minúcia), é apresentada. Grandes bases de mapas KH, uma para cada nuvem de minúcia identificada, podem ser construídos com essa técnica. A estratégia de busca e identificação, em duas etapas, baseia-se primeiro em padrões locais de gradientes (LGP) dos mapas KH, para reduzir o espaço de busca dentro da base, seguidos de uma comparação que utiliza uma medida de similaridade, a correlação cruzada normalizada dos padrões pré-selecionados com o LGP com os que se quer identificar. A acuracidade do método e sua compatibilidade com os métodos correntes, comparável ou superior à dos métodos 2D, é verificada através da identificação biométrica de impressões digitais 3D utilizando duas bases de imagens, uma adquirida através da tecnologia OCT e a outra gentilmente cedida pela Universidade Politécnica de Hong Kong. A base de imagens OCT, a primeira adquirida com essa tecnologia, é composta de imagens coletadas de onze voluntários em duas sessões de escaneamento e contém imagens de dedos de pessoas com diferentes idades, gênero e etnias e contém casos de cicatrizes, calos e alterações, tais como abrasão e arranhões. Uma base de impressões digitais 2D, obtida dos mesmos voluntários através de um leitor regular de impressões digitais, foi adquirida para permitir uma comparação da técnica proposta com os métodos de identificação tradicionais. A aplicabilidade do método proposto à identificação de impressões digitais alteradas, deterioradas acidentalmente ou intencionalmente, é investigada. Nesses casos, a impressão digital 3D extraída da derme e compatível com a da epiderme é empregada. A identificação destas impressões 3D alteradas é testada utilizando a base de imagens adquiridas com OCT. A acuracidade da técnica é comparada com a obtida utilizando os métodos tradicionais 2D usando os gráficos de taxas de Falsa Aceitação e Falsa Rejeição (FAXxFRR) e de Características Cumulativas de Identificação (CMC). Impressões digitais 2D, extraídas a partir das impressões digitais 3D simulando o rolamento do dedo durante a aquisição (rolamento virtual), foram geradas e sua compatibilidade com as bases de imagens 2D foi testada. Um conjunto de medidas de avaliação de qualidade foram aplicados às bases de imagens de impressões digitais 3D e sua correspondência aos escores de identificação foi analisada para determinar aqueles que podem contribuir para melhorar a acuracidade da identificação. Palavras-chave: Impressões digitais 3D. Identificação Biométrica. Tomografia de Coerência Ótica.
Abstract: A method to obtain epidermal and dermal 3D fingerprints from high-resolution images acquired using Optical Coherence Tomography (OCT) is proposed. This method addresses limitations of current 3D reconstruction techniques that employ multiple cameras/triangulation or structured illumination such as depth and resolution variations from the center to the borders of the fingerprint caused by reconstruction errors, sensitivity to low illumination and poor contrast. The availability of these 3D fingerprints allowed the creation of new matching methods that benefit from the rich information available in 3D. A 3D fingerprint matching technique based on novel patterns, the KH maps (used to surface region segmentation in range and intensity images), extracted by computing the Gaussian and mean curvatures (SILVA; BELLON; GOTARDO, 2001) from a region of interest around the minutiae, named minutiae clouds is presented. Large databases of KH maps, one for each identified minutiae cloud can be built. The matching strategy, a two-step approach, relies on local gradient patterns (LGP) of the KH maps to narrow the search space, followed by a similarity matching, the normalized cross correlation of patterns being matched. The accuracy and matching compatibility, comparable or improved in relation to the 2D matching methods, is verified through matching 3D fingerprints from two databases one acquired using OCT and a public database gently made available by the Hong Kong Polytechnic University. The OCT database, the first 3D database acquired using Optical Coherence Tomography, to our knowledge, is made of images collected from eleven volunteers in two scanning sessions and contains images of people of different ages, genders and ethnicities and also cases of scars, calluses and alterations as abrasion and scratches. A 2D fingerprint database, scanned from the same volunteers using a regular fingerprint reader was also obtained for comparison with traditional matching methods. We investigate the applicability of our method to the identification of altered fingerprints, damaged unintentionally or accidentally. In these cases, the 3D dermal fingerprint, compatible with the epidermis fingerprint, is employed. Matching with 3D dermal and epidermal fingerprints is tested in the OCT database. Matching accuracy is compared with the obtained using traditional matching 2D methods by using False Acceptance and False rejection rate (FARxFRR) and Cumulative Matching Characteristics (CMC) graphs. Unwrapped fingerprints, 2D fingerprints extracted from 3D fingerprints by virtual unrolling were generated and tested for compatibility with 2D databases. A set of quality evaluation measures were employed to the 3D fingerprint databases and their correspondence to the matching scores was analyzed to identify those that can contribute to improve the matching accuracy. Key-words: 3D Fingerprints. Biometric identification. Optical Coherence Tomography.
Watkinson, Shelley N. "Approaches towards the quantification of caffeine and metabolites in fingerprints." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/845799/.
Full textBeasley, Maryssa. "Obtaining Unique Fingerprints from Human Hair Samples Using Proteomic Data." Ohio University Honors Tutorial College / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ouhonors1492707081294979.
Full textOleiwi, Abdulrahman Abdulkhaleq. "Experimental approaches to improving trace DNA recovery from developed fingerprints." Thesis, University of Wolverhampton, 2015. http://hdl.handle.net/2436/595868.
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