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Dissertations / Theses on the topic 'Fundus Image'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Gonzalez, Ana Guadalupe Salazar. "Structure analysis and lesion detection from retinal fundus images." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/6456.

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Ocular pathology is one of the main health problems worldwide. The number of people with retinopathy symptoms has increased considerably in recent years. Early adequate treatment has demonstrated to be effective to avoid the loss of the vision. The analysis of fundus images is a non intrusive option for periodical retinal screening. Different models designed for the analysis of retinal images are based on supervised methods, which require of hand labelled images and processing time as part of the training stage. On the other hand most of the methods have been designed under the basis of specif

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2

Colomer, Granero Adrián. "Fundus image analysis for automatic screening of ophthalmic pathologies." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/99745.

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En los ultimos años el número de casos de ceguera se ha reducido significativamente. A pesar de este hecho, la Organización Mundial de la Salud estima que un 80% de los casos de pérdida de visión (285 millones en 2010) pueden ser evitados si se diagnostican en sus estadios más tempranos y son tratados de forma efectiva. Para cumplir esta propuesta se pretende que los servicios de atención primaria incluyan un seguimiento oftalmológico de sus pacientes así como fomentar campañas de cribado en centros proclives a reunir personas de alto riesgo. Sin embargo, estas soluciones exigen una alta carga

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3

Běťák, Ondřej. "Multimodální registrace retinálních snímků z fundus kamery a OCT." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219716.

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V první části se práce se zabývá rešerší metod a principů potřebných při registraci obrazu. Dále pak popisuje zobrazovací systémy očního pozadí jako jsou OCT, fundus kamera a SLO. Druhá část práce je zaměřena na praktickou realizaci programů pro registraci snímků z OCT, SLO a fundus kamery v programovém prostředí Matlab.

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4

Morales, Martínez Sandra. "Fundus characterization for automatic disease screening through retinal image processing." Doctoral thesis, Editorial Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/53933.

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[EN] The World Health Organization estimates that in 2010 there were 285 million people visually impaired in the world. It is calculated that the 80\% of these cases are preventable or treatable. In addition, aging population and chronic disease increase are two factors that predict a higher number of blindness cases in the future. Hypertension, diabetic retinopathy (DR), age-related macular degeneration (AMD) and glaucoma are the most common pathologies in the current society that provoke retinal damage and can be directly related to blindness and vision loss. The early diagnosis of these dis

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Svoboda, Ondřej. "Pokročilé metody segmentace cévního řečiště na fotografiích sítnice." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220290.

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Segmentation of vasculature tree is an important step of the process of image processing. There are many methods of automatic blood vessel segmentation. These methods are based on matched filters, pattern recognition or image classification. Use of automatic retinal image processing greatly simplifies and accelerates retinal images diagnosis. The aim of the automatic image segmentation algorithms is thresholding. This work primarily deals with retinal image thresholding. We discuss a few works using local and global image thresholding and supervised image classification to segmentation of bloo

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6

Xu, Xiayu. "Automated delineation and quantitative analysis of blood vessels in retinal fundus image." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3017.

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Automated fundus image analysis plays an important role in the computer aided diagnosis of ophthalmologic disorders. A lot of eye disorders, as well as cardiovascular disorders, are known to be related with retinal vasculature changes. Many studies has been done to explore these relationships. However, most of the studies are based on limited data obtained using manual or semi-automated methods due to the lack of automated techniques in the measurement and analysis of retinal vasculature. In this thesis, a fully automated retinal vessel width measurement technique is proposed. This novel metho

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7

Pinkava, Marek. "Extrakce krevního řečiště z Fundus snímku lidského oka." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220635.

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This thesis deals with processing of retinal fundus images. Vision is the most important human sense and its injury has very serious consequences for humans. Automatic processing of retinal images increases the efficiency of medical examination and accelerates diagnoses of deseases. Retina exhibits unique characteristics for each person and thus can also be used to identify people. In this task is briefly discussed the structure and properties of each parts of the eye, particularly the retina, and their possible diseases such as diabetic retinopathy, glaucoma and age related macular degenerati

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8

Díaz, Pinto Andrés Yesid. "Machine Learning for Glaucoma Assessment using Fundus Images." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/124351.

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[ES] Las imágenes de fondo de ojo son muy utilizadas por los oftalmólogos para la evaluación de la retina y la detección de glaucoma. Esta patología es la segunda causa de ceguera en el mundo, según estudios de la Organización Mundial de la Salud (OMS). En esta tesis doctoral, se estudian algoritmos de aprendizaje automático (machine learning) para la evaluación automática del glaucoma usando imágenes de fondo de ojo. En primer lugar, se proponen dos métodos para la segmentación automática. El primer método utiliza la transformación Watershed Estocástica para segmentar la copa óptica y post

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9

Hu, Qiao. "Automatic construction of arterial and venous vascular trees in fundus images." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3107.

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The retinal vasculature analysis plays an important role in the diagnosis of ophthalmological diseases, as well as general human disorders that manifest on the retina. The fundus photograph is a 2-D color image modality of the retina and is widely used in modern ophthalmology clinics due to its relatively low cost and its non-invasive access to the retina. However, due to the complexity of the retinal vasculature presented on the image and the large variation of the image quality, no automated method is able to re-construct the retinal vasculature (i.e. construct arteriovenous trees) satisfact

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Klimeš, Filip. "Zpracování obrazových sekvencí sítnice z fundus kamery." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-220975.

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Cílem mé diplomové práce bylo navrhnout metodu analýzy retinálních sekvencí, která bude hodnotit kvalitu jednotlivých snímků. V teoretické části se také zabývám vlastnostmi retinálních sekvencí a způsobem registrace snímků z fundus kamery. V praktické části je implementována metoda hodnocení kvality snímků, která je otestována na reálných retinálních sekvencích a vyhodnocena její úspěšnost. Práce hodnotí i vliv této metody na registraci retinálních snímků.

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Van, der Westhuizen Christo Carel. "Efficient registration of limited field of view ocular fundus imagery." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85633.

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Thesis (MScEng)-- Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Diabetic- and hypertensive retinopathy are two common causes of blindness that can be prevented by managing the underlying conditions. Patients suffering from these conditions are encouraged to undergo regular examinations to monitor the retina for signs of deterioration. For these routine examinations an ophthalmoscope is used. An ophthalmoscope is a relatively inexpensive device that allows an examiner to directly observe the ocular fundus (the interior back wall of the eye that contains the retina). These devices a

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Giancardo, Luca. "Automated fundus images analysis techniques to screen retinal diseases in diabetic patients." Phd thesis, Université de Bourgogne, 2011. http://tel.archives-ouvertes.fr/tel-00692354.

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In this Ph.D. thesis, we study new methods to analyse digital fundus images of diabetic patients. In particular, we concentrate on the development of the algorithmic components of an automatic screening system for diabetic retinopathy. The techniques developed can be categorized in: quality assessment and improvement, lesion segmentation and diagnosis. For the first category, we present a fast algorithm to numerically estimate the quality of a single image by employing vasculature and colour-based features; additionally, we show how it is possible to increase the image quality and remove refle

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Šikula, Viktor. "Lícování snímků sítnice pomocí metody fázové korelace." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219201.

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This master thesis deals with retinal image registration using phase correlation technique. There are described properties of retinal images and modality of scanning. A geometrical transformation encompasing scale, rotation and translation between two retinal images is considered and the whole registration framework is described. There are used retinal images from fundus camera and scanning laser ophthalmoscope (SLO). In this thesis is described corresponding bifurcations detection using phase correlation and registration using second-order polynomial transformation. The results are subjective

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Odstrčilík, Jan. "Analýza obrazových dat sítnice pro podporu diagnostiky glaukomu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-233628.

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Fundus kamera je široce dostupné zobrazovací zařízení, které umožňuje relativně rychlé a nenákladné vyšetření zadního segmentu oka – sítnice. Z těchto důvodů se mnoho výzkumných pracovišť zaměřuje právě na vývoj automatických metod diagnostiky nemocí sítnice s využitím fundus fotografií. Tato dizertační práce analyzuje současný stav vědeckého poznání v oblasti diagnostiky glaukomu s využitím fundus kamery a navrhuje novou metodiku hodnocení vrstvy nervových vláken (VNV) na sítnici pomocí texturní analýzy. Spolu s touto metodikou je navržena metoda segmentace cévního řečiště sítnice, jakožto da

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Bortolin, Júnior Sérgio Antônio Martini. "Detecção automática de microaneurismas e hemorragias em imagens de fundo do olho." Universidade Federal do Pampa, 2013. http://dspace.unipampa.edu.br:8080/xmlui/handle/riu/243.

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Submitted by Sandro Camargo (sandro.camargo@unipampa.edu.br) on 2015-05-09T18:40:27Z No. of bitstreams: 1 117110023.pdf: 2523085 bytes, checksum: 76eb3f9960e2b4f9df14435d3092b156 (MD5)<br>Made available in DSpace on 2015-05-09T18:40:27Z (GMT). No. of bitstreams: 1 117110023.pdf: 2523085 bytes, checksum: 76eb3f9960e2b4f9df14435d3092b156 (MD5) Previous issue date: 2013-12-13<br>Este trabalho tem como objetivo a proposição de um novo método para a detecção automática de microaneurismas e hemorragias em imagens de fundo do olho. Essas lesões são consideradas o primeiro sinal de retinopatia d

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Oliveira, André Orlandi de. "Retinógrafo coaxial não-midriático." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-01122017-144856/.

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Retinógrafo é um complexo sistema óptico que, simultaneamente, ilumina e captura imagens da retina. Basicamente, esse equipamento é composto por três módulos: iluminação, lente objetiva e detecção. Em razão de seu sofisticado desenho óptico, é possível conciliar baixa refletividade da retina e obtenção de imagens de alta qualidade. Entretanto, em virtude do alto número de componentes não-coaxiais do módulo de iluminação, seu alinhamento óptico se torna complexo. Neste trabalho, é apresentado um sistema óptico totalmente coaxial para um retinógrafo nãomidriático. A óptica de iluminação tradicio

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17

Welfer, Daniel. "Métodos computacionais para identificar automaticamente estruturas da retina e quantificar a severidade do edema macular diabético em imagens de fundo de olho." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/34777.

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Através das imagens de fundo do olho, os especialistas em oftalmologia podem detectar possíveis complicações relacionadas ao Diabetes como a diminuição ou até a perda da capacidade de visão. O Edema Macular Diabético (EMD) é uma das complicações que lideram os casos de danos à visão em pessoas em idade de trabalho. Sendo assim, esta tese apresenta métodos para automaticamente identificar os diferentes níveis de gravidade do Edema Macular Diabético visando auxiliar o especialista no diagnóstico dessa patologia. Como resultado final, propõe-se automaticamente e rapidamente identificar, a partir

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Prosser, Jan. "Lícování sekvencí sítnice pomocí fázové korelace." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-378151.

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This master’s thesis is aimed at registration of frames of retinal fundus video using phase corre- lation. An introduction describes general research in topic of retinal fundus, eye movements, diff erent approaches for image registration, phase correlation and examples of phase corre- lation applications. The second, practical part of master’s thesis, is dedicated to description of the proposed algorithm for registration of frames of retinal fundus video. The description of the proposed algorithm is divided into three parts. First two parts describe how frames of retinal fundus video are rated

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Harabiš, Vratislav. "Registrace obrazů - aplikace v oftalmologii a ultrasonografii." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-233627.

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Image registration is widely used in clinical practice. However image registration and its~evaluation is still challenging especially with regards to new possibilities of various modalities. One of these areas is contrast-enhanced ultrasound imaging. The time-dependent image contrast, low signal-to-noise ratio and specific speckle pattern make preprocessing and image registration difficult. In this thesis a method for registration of images in ultrasound contrast-enhanced sequences is proposed. The method is based on automatic fragmentation into image subsequences in which the images with simi

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Baše, Michal. "Detekce bifurkací cévního řečiště na sítnici." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219260.

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This master thesis deals with detection of blood-vessel bifurcations in retinal images and its properties. There are explained procedure of taking photographs of retina by fundus camera, optical coherence tomography (OCT) and scanning laser opthalmoscope (SLO) and properties of fundus images are described. In this thesis are mentioned some effective thresholding methods and there are explained the most important morphological operations with binary images, as well as with grayscale images. Detected bifurcations are used for image registration with second-order polynomial transformation using c

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Kadla, Jan. "Časová interpolace oftalmologických videosekvencí pomocí multimodálního lícování." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220855.

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This master’s thesis gives a description of fundus camera as a medical imaging system. Sub features of this system are explained in short, thus examples of certain construction variants are given. Furthermore, the work deals with image fusion and associated possibilities of digital image processing. One set of consecutive scanned images of human eye’s retina has been provided for the practical part of this work. During program processing of these data, decomposition of obtained images to single-color sequences is performed. For these partial monochromatic sequences, monomodal registration is p

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Jönsson, Marthina. "Automated methods in the diagnosing of retinal images." Thesis, KTH, Systemsäkerhet och organisation, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122721.

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This report contains a summation of a variety of articles that have been read and analysed. Each article describes different methods that can be used to detect lesions, optic disks, drusen and exudates in retinal images. I.e. diagnose e.g. Diabetic Retinopathy and Age-Related Macular Degeneration. A general approach is presented, which all methods more or less is based on. Methods to locate the optic disk The PCA kNN Regression Hough Transform Fuzzy Convergence Vessel Direction Matched Filter Etc. The best method based on result, reliability, number of images and publisher is kNN regres

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Vieira, Flávio Pascoal. "Proposta de inovação no sistema de aquisição de imagens aplicado em retinógrafos digitais." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-14052013-082239/.

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A retinografia e angiografia digital são técnicas de observação e captura de imagens do fundo do olho que permitem o diagnóstico de diversas patologias. O aperfeiçoamento dos retinógrafos digitais, viabilizado pelos avanços tecnológicos observados nas últimas décadas, tornou possíveis modificações sistêmicas inovadoras como a apresentada e discutida neste trabalho. O principal objetivo é avaliar comparativamente a resolução espacial de imagens captadas com uma configuração que utiliza apenas um sensor monocromático e um conjunto de LEDs cromáticos, com imagens geradas por um sensor com filtro

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Escorcia, Gutierrez José. "Image Segmentation Methods for Automatic Detection of the Anatomical Structure of the Eye in People with Diabetic Retinopathy." Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/671543.

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Aquesta tesi s'emmarca dins del pla integral de prevenció precoç de la Retinopatia Diabètica (RD) posat en marxa pel govern espanyol seguint les recomanacions de l'Organització Mundial de la Salut de promoure iniciatives que consciencien sobre la importància de fer revisions oculars regulars entre les persones amb diabetis. Per tal de poder determinar el nivell de retinopatia diabètica cal localitzar i identificar diferents tipus de lesions a la retina. Per poder fer-ho, cal que primer s'eliminin de la imatge les estructures anatòmiques normals de l'ull (vasos sanguinis, disc òptic i fòvea

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Štohanzlová, Petra. "Multimodální registrace obrazů sítnice." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219244.

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This work deals with possibilities of registration of retinal images from different mo-dalities, concretely optical coherence tomography (OCT), scanning laser ophthalmoscopy (SLO) and fundus camera. In first stage is the interest focused on registration of SLO and fundus images, which will serve to determine area of interest for consecutive registration of OCT data. The final stage is finding correct location of OCT B-scans in fundus image. On the basis of the studied methods of registration was chosen method making use of computation of correlation coefficient for both cases. For finding opti

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Stuchi, José Augusto. "Registro de imagens por correlação de fase para geração de imagens coloridas em retinógrafos digitais utilizando câmera CCD monocromática." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18152/tde-18072013-110903/.

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A análise da retina permite o diagnostico de muitas patologias relacionadas ao olho humano. A qualidade da imagem e um fator importante já que o médico normalmente examina os pequenos vasos da retina e a sua coloração. O equipamento normalmente utilizado para a visualização da retina e o retinógrafo digital, que utiliza sensor colorido com filtro de Bayer e luz (flash) branca. No entanto, esse filtro causa perda na resolução espacial, uma vez que e necessário um processo de interpolação matemática para a formação da imagem. Com o objetivo de melhorar a qualidade da imagem da retina, um retinóg

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Říha, Pavel. "Pokročilé zpracování oftalmologických video sekvencí retinálních obrazů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-221355.

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The diploma thesis deals with registration and analysis of images from the experimental low-cost fundus camera that reaches a low SNR (around 10 dB) and low temporal and spatial resolution. The aim of the diploma tesis is to explore the possibilities of digital processing leading to the creation of a videosequence that has real benefits for medical diagnostics. The well-known program elastix is used for registration. Preprocessing filters and interpolation are implemented in Matlab. The program provides a wide range of setting options, out of which many combinations were tested and evaluated.

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Macek, Ján. "Klasifikace a rozpoznávání patologických nálezů v obrazech sítnice oka." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-255376.

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Diabetic retinopathy and age-related macular degeneration are two of the most common retinal diseases in these days, which can lead to partial or full loss of sight. Due to it, it is necessary to create new approaches enabling to detect these diseases and inform the patient about his condition in advance. The main objective of this work is to design and to implement an algorithm for retinal diseases classification based on images of the patient's retina of previously mentioned diseases. In the first part of this work, there is described in detail each stage of each disease and its the most fre

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Sekhar, Sribalamurugan. "Automated localisation of landmarks in retinal fundus images." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533938.

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Poletti, Enea. "Progettazione, realizzazione e valutazione clinica di uno strumento ad ottica adattiva per l'analisi automatica della retina." Doctoral thesis, Università degli studi di Padova, 2010. http://hdl.handle.net/11577/3422249.

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This thesis deals with the automatic analysis of colour fundus images and with the applications of such analysis in the evaluation of hypertensive and diabetic retinopathy. In particular, it aims at developing the project of an adaptive optics fundus camera for retinal fundus acquisition and focuses on the software implementation for the analysis and the quantitative evaluation of retinopathies. Microcirculation is affected, although with different time courses, by both hypertension and diabetes, and retinopathy is one of the consequences of such circulation damage. The retina and the retinal

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Rahim, S. S. "Automatic screening and classification of diabetic retinopathy eye fundus images." Thesis, Coventry University, 2016. http://curve.coventry.ac.uk/open/items/affaf3f0-540a-444e-b6bb-243046d58b25/1.

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Diabetic Retinopathy (DR) is a disorder of the retinal vasculature. It develops to some degree in nearly all patients with long-standing diabetes mellitus and can result in blindness. Screening of DR is essential for both early detection and early treatment. This thesis aims to investigate automatic methods for diabetic retinopathy detection and subsequently develop an effective system for the detection and screening of diabetic retinopathy. The presented diabetic retinopathy research involves three development stages. Firstly, the thesis presents the development of a preliminary classificatio

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Smyth, Danielle Julianna. "Characterisation of cellulases from anaerobic fungus Piromyces sp. strain KS11 /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19081.pdf.

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Wang, Su. "On human level understanding of digital fundus images for retinal disease detection." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/814169/.

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Diabetic retinopathy (DR) is the damage to the retina and is a complication that can affect diabetes population. It is one of the most common causes of blindness worldwide. In any diabetic retinopathy screening programme or population based clinical study, a large number of digital fundus images are captured. These images are diagnosed by trained human experts, which can be a costly and time-consuming task due to the number of images they have to examine. Therefore, this is a field that would greatly benefit from the development of automated fundus analysis systems. It may potentially facilita

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Nourse, Jamie. "The structure, organisation and function of dispensable chromosomes in the phytopathogenic fungus Colltotrichum Gloeosporioides /." St. Lucia, Qld, 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16086.pdf.

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Laissue, P. P. "Morphogenesis of a filamentous fungus : dynamics of the actin cytoskeleton and control of hyphal integrity in Ashbya gossypii." Thesis, University of Kent, 2004. https://kar.kent.ac.uk/12170/.

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Ang, Gerard S. L. "Measuring the performance of the Australian multi-sector superannuation funds using data envelopment analysis /." [St. Lucia, Qld], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18227.pdf.

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Qureshi, Touseef Ahmad. "Extraction of arterial and venous trees from disconnected vessel segments in fundus images." Thesis, University of Lincoln, 2016. http://eprints.lincoln.ac.uk/23687/.

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The accurate automated extraction of arterial and venous (AV) trees in fundus images subserves investigation into the correlation of global features of the retinal vasculature with retinal abnormalities. The accurate extraction of AV trees also provides the opportunity to analyse the physiology and hemodynamic of blood flow in retinal vessel trees. A number of common diseases, including Diabetic Retinopathy, Cardiovascular and Cerebrovascular diseases, directly affect the morphology of the retinal vasculature. Early detection of these pathologies may prevent vision loss and reduce the risk of

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Gosbee, Melinda Jane. "Water deficit stress and the colonisation of mango plant tissue by the stem end rot fungus, Botryospaeria dothidea /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17490.pdf.

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Tsukamoto, Shuhei. "The sectoral analysis of credit direction and rationing in Japan from 1954 to 1991 : from the viewpoints of flow-of-funds accounts, financial reforms, and business investments /." St. Lucia, Qld, 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18082.pdf.

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Tebenkova, Iuliia. "Klasifikace cévního řečiště na snímcích sítnice." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220067.

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Retinal image analysis plays a very important role, as human gets around 90% of environment information with the help of eyes. Automation of process of retinal image analysis promotes to improve the efficiency of retinal medical examinations. The following thesis is dedicated to automatic classification methods of retinal vascular system images obtained from a digital fundus camera. Vessel classification method using classifier on the base of neural networks, which is trained and then tested on the retinal vessel segments, is investigated and implemented. In this thesis anatomical retinal surv

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Carapito, Sofia Isabel Alexandre. "O estatuto da imagem na publicidade e o seu valor estratégico : reposicionamento da marca Fundão." Master's thesis, Universidade da Beira Interior, 2010. http://hdl.handle.net/10400.6/1269.

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Vivemos, actualmente, numa sociedade que se caracteriza por uma emergente tecnologia das comunicações e dos media de massas, onde se destaca, na publicidade, a importância crescente e visível da imagem, sendo incontornável a sua presença em todos os contextos do quotidiano social. Estas imagens publicitárias têm o propósito de causar uma sensação e um impacto, de modo a ficar na mente do consumidor, atribuindo, assim, uma identidade a um produto. O uso da imagem tem-se revelado, então, um instrumento valioso de trabalho e um aparelho argumentativo cheio de artifícios, para os quais tem contri

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Navarro, Coll Julia. "Análisis iconográfico desde una perspectiva de género de las fundas de disco de la Bibliothèque nationale de France desde 1900 hasta 1940." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/60157.

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[EN] This Doctoral Thesis analyzed from a gender and iconographic perspective still images accompanying the music recorded between 1900 and 1940, particularly in the album sleeves localized by intensive fieldwork in the Bibliothèque nationale de France. The sample size, 512 individuals, is supported with specific material of particular relevance, wax cylinders package, pianola rolls and albums disc, located on the funds from the Museu de la Música de Barcelona, the Biblioteca de Catalunya, Biblioteca Nacional de España, the Hochschule für Musik und Tanz Köln and Musikaren Euskal Artxiboa, A

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Lieberman, Kenneth R. "Reforming a nation : implications of IMF conditionality on Russia /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FLieberman.pdf.

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Thesis (M.A. in National Security Affirs)--Naval Postgraduate School, June 2003.<br>Thesis advisor(s): Robert McNab, Karen Guttieri, Robert Looney. Includes bibliographical references (p. 63-67). Also available online.

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Vančurová, Johana. "Segmentace cévního řečiště v retinálních obrazových datech." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400975.

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This master´s thesis deals with blood vessel segmentation in retinal image data. The theoretical part is focused on the basic description of anatomy and physiology of the eye and methods of observing the back of the eye. This thesis also describes the principles of classical and convolutional neural networks and segmentation techniques that are used to segment blood vessel in retinal images. In the practical part, a segmentation method using convolutional neural network U-net is implemented. This neural network is trained on the three datasets. Two datasets include images from experimental vid

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Walczysko, Martin. "Segmentace cév v obrazech sítnice." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218767.

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This thesis deals with method of blood vessels segmentation from retinal images acquired by fundus camera. There is explored possibility of using wavelet transform as fast outline segmentation. The thesis includes study problems of preprocessing input image and decomposition of image using 2D DWT. Furthermore there is explored possibility of parametrical images thresholding that ensue from application of 2D DWT. There are designed algorithms for cleaning off artifacts from rough vessel map of blood vessel structures. The realization of algorithm was solved in programming environment MATLAB. Th

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Grace, Paul. "Investigation of the efficacy of an online diagnostic tool for improving the diagnosis of ocular fundus lesions imaged by Optical Coherence Tomography (OCT)." Thesis, London South Bank University, 2017. http://researchopen.lsbu.ac.uk/1839/.

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Background: Novel ocular imaging technology has proliferated within UK community optometry. Optical Coherence Tomography (OCT) is a pillar of ocular imaging, playing a central role in retinal disease management. As a non-invasive method for diagnosis and follow-up of patients with common retinal conditions such as age-related macular degeneration (AMD) and diabetic macular oedema, OCT is well suited to the primary care setting of community optometry. The novel nature of OCT images presents considerable challenges for community optometrists. AMD prevalence will rise as a consequence of populati

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Grizzle, Linda S. "Three Pension Cost Methods under Varying Assumptions." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd850.pdf.

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SILVA, Roberto Higino Pereira da. "Algoritmo para extração de imagens de fundo não homogêneos usando o espaço de cores YCbCr." Universidade Federal de Campina Grande, 2006. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1511.

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Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-08-20T20:47:40Z No. of bitstreams: 1 ROBERTO HIGINO PEREIRA DA SILVA - DISSERTAÇÃO PPGEE 2006..pdf: 1429650 bytes, checksum: 8995a1f77f3e3471161b540826a56f6e (MD5)<br>Made available in DSpace on 2018-08-20T20:47:40Z (GMT). No. of bitstreams: 1 ROBERTO HIGINO PEREIRA DA SILVA - DISSERTAÇÃO PPGEE 2006..pdf: 1429650 bytes, checksum: 8995a1f77f3e3471161b540826a56f6e (MD5) Previous issue date: 2006-05-29<br>A extração de objetos em uma imagem tem várias aplicações na área da automação, tais como: reconhecimento de padrões em

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Tretter, Zdeněk. "Generování syntetických obrazů sítnic oka." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2017. http://www.nusl.cz/ntk/nusl-363734.

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The goal of this thesis is to design and implement a program capable of automatically generating synthetic images of eye retinas. The generated images should be similar to those of real retinas, which are hard to obtain, so they could be used for development of various algorithms, which work with eye retina images in their place. This thesis describes anatomic properties of the eye retina, ways to take images of it and also usage of eye retina recognition in biometric and medicinal applications. Design of the program and the way in which individual parts of the retina are assembled together in

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Pres, Martin. "Lokalizace bifurkací ve snímcích sítnice." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2016. http://www.nusl.cz/ntk/nusl-255405.

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From biometrical point of view, main features of retina are fovea, optic nerve and blood vessel tree. Blood vessel tree is unique for each person and this biological feature is used in biometric systems for person-recognition by retinal images. This document describes methods for optic disc and fovea localization, method for vessel tree segmentation, which is based on well-known \emph{Matched filters} method and also describes method for localization of blood vessel bifurcations. Main goal of this thesis is creation of program which can automatically preprocess input image, segment blood vesse

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