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Dissertations / Theses on the topic 'Fundus camera'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

DeHoog, Edward Allen. "Novel Fundus Camera Design." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/195633.

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A fundus camera a complex optical system that makes use of the principle of reflex free indirect ophthalmoscopy to image the retina. Despite being in existence as early as 1900's, little has changed in the design of a fundus camera and there is minimal information about the design principles utilized. Parameters and specifications involved in the design of fundus camera are determined and their affect on system performance are discussed. Fundus cameras incorporating different design methods are modeled and a performance evaluation based on design parameters is used to determine the effectivene

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Hartlová, Marie. "Analýza cév optického disku v sérii snímků z experimentální fundus kamery." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-220370.

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Segmentation of the vasculature is an important step in the process of the retinal image analysis.Theresultsoftheanalysiscanbeusedtodiagnoseseveraleyeandcardiovascular diseases. The aim of this thesis is to search for possibilities in video-sequences from experimental fundus camera.

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Modugno, Rodrigo Gonzalez. "Uma contribuição ao projeto de retinógrafos digitais." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-29042009-090053/.

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Este trabalho apresenta as metodologias que foram empregadas no desenvolvimento de um equipamento de retinografia digital. O sistema proposto foi inteiramente desenvolvido, e manufaturado no Brasil, tornando-se o primeiro retinógrafo digital com tecnologia nacional. O equipamento descrito nesta dissertação é capaz de realizar tanto retinografias, que são imagens capturadas para observação do fundo de olho, quanto angiografias, que são exames nos quais, por meio da administração de contrastes, é possível destacar estruturas específicas da retina. Estes procedimentos permitem o diagnóstico de di

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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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Alterini, Tommaso. "Hyperspectral imaging system for the fast recording of the ocular fundus." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/672138.

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Vision loss affects physical, psychological, and emotional wellbeing and social life as well. High life expectancy and health policies are translated into an aging population worldwide, which has higher risk of eye’s disorders and diseases. Therefore, new systems able to contribute at non-invasive objective diagnosis of ocular diseases are demanded. In this context, optical imaging techniques have a primary role as they allow obtaining information from almost any part of the eye. In particular, many important eye and systemic diseases early manifest themselves in the retina and, since the pion

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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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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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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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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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Dostál, Vladimír. "Předzpracování obrazů sítnice." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218663.

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This thesis deals with the principle of capturing images of the retina of fundus camera, their features and then preprocessing. The aim of preprocessing is the correction of nonillumination in images of the retina. The model of non-illumination is obtained by using parametric surfaces. Coons surface was selected from a set of surfaces based on the knowledge of retinal images. This has been approximated by a non-uniform illumination. Then the thesis concentrates on describing the methods involving shading corrections. Compensation of non-uniform illumination is based on the use of parametric su

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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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Sedláček, Miloš. "Matematický model trajektorie svazku nervových vláken pro účely diagnostiky glaukomu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219503.

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This work deals with mathematical description of nerve fiber bundle trajectories for the diagnosis of glaucoma. Also gives a brief explanation in the principle of fundus camera and glaucoma. Its aim is to implement the model into MATLAB software, to project a~methodics of its use and also to realize it.

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Stružka, Jaroslav. "Rozpoznávání podle sítnice oka." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-237178.

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This thesis deals with recognition by retina (identification, verification). In introduction we describe information about human eye, its diseases with focus on retina impact. Further (in main part) we conduct SW analyses based on biometry retina requirements and design of SW application for retina recognition. It is based on processing pipeline design (sequential application of image filters). This pipeline mostly contains filters focused on edge detection, adaptive threshold and skeletonisation. Finally, basic SW functions includes users registration (enroll), identification, verification. I

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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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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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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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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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Malaník, Petr. "Řízení manipulátoru pro snímání sítnice oka." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2020. http://www.nusl.cz/ntk/nusl-417300.

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To use the image of the retina for biometric or medical purposes, it is necessary that the image is of the highest quality and ideally covers the largest possible area. It is therefore necessary to move the sensing device to the most suitable position while ensuring its stability. A laboratory handling platform is used for this purpose. The platform is moved by stepper motors. A control board equipped with a microcontroller has been developed for their control, which allows very fine movements. The theoretical accuracy of the manipulator is up to 20 nm. Since it is necessary for sensing, to ha

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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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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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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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Trumpp, Alexander, Johannes Lohr, Daniel Wedekind, et al. "Camera-based photoplethysmography in an intraoperative setting." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-234950.

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Background Camera-based photoplethysmography (cbPPG) is a measurement technique which enables remote vital sign monitoring by using cameras. To obtain valid plethysmograms, proper regions of interest (ROIs) have to be selected in the video data. Most automated selection methods rely on specific spatial or temporal features limiting a broader application. In this work, we present a new method which overcomes those drawbacks and, therefore, allows cbPPG to be applied in an intraoperative environment. Methods We recorded 41 patients during surgery using an RGB and a near-infrared (NIR) camera. A

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Marochi, Maria Angelica. "Uma metodologia para triagem, quantificação e confirmação de tricotecenos e zearalenona utilizando cromatografia de camada delgada." [s.n.], 1988. http://repositorio.unicamp.br/jspui/handle/REPOSIP/254708.

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Orientador: Lucia Maria Valente Soares<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-07-15T09:59:35Z (GMT). No. of bitstreams: 1 Marochi_MariaAngelica_M.pdf: 2637272 bytes, checksum: 420fbf7b449c8f8ffb208eb34d41ade3 (MD5) Previous issue date: 1988<br>Resumo: Surtos de fusariose em animais são regularmente relatados no sul do país, importante centro produtor de grãos. Paralelamente o Brasil importa cereais de países em que, reconhecidamente, existem prob1emas com tricotecenos e zearalenona. Com a falta

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Lencione, Diego. "Desenvolvimento de sistemas ópticos e modelos radiométricos para otimização sistêmica em retinógrafos de alta resolução." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-04042013-110931/.

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O principal intento deste trabalho é demonstrar como a combinação de resultados de modelos radiométricos e de análises do limite de resolução de imagens produzem impactos positivos não apenas no projeto óptico de retinógrafos de alta resolução, mas que também geram ferramentas que auxiliam na definição da arquitetura de todo o equipamento, considerando, inclusive, os limites impostos por normas internacionais para a segurança do paciente em relação a radiação emitida na realização dos exames. Particularmente ao projeto óptico, foram desenvolvidos os sistemas de iluminação e imageamento da reti

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Hilário, Felipe. "Estudo químico e avaliação da atividade antimicrobiana de fungos endofíticos associados à Paepalanthus chiquitensis (eriocaulaceae) e efeitos de moduladores químicos epigenéticos no cultivo de Pochonia chlamydosporia /." Araraquara, 2016. http://hdl.handle.net/11449/136389.

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Orientador: Lourdes Campaner dos Santos<br>Coorientador: Taís Maria Bauab<br>Banca: Daniel Rinaldo<br>Banca: Rosemeire Cristina Linhari Rodrigues Pietro<br>Resumo: Este trabalho apresenta os resultados da pesquisa de metabólitos secundários ativos produzidos por fungos endofíticos associados às partes aéreas (folhas, escapos e capítulos) de Paepalanthus chiquitensis (Eriocaulaceae). Entre os 25 fungos isolados da espécie de Eriocaulaceae, o Fusarium sp. foi o fungo mais promissor quanto à atividade antimicrobiana para as cepas de bactérias Gram-negativa Escherichia coli e Salmonella setubal, d

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Cecílio, Renato Oliveira. "\"Estrutura tridimensional das correntes geradas pelo vento na Plataforma Continental da região sul do Brasil\"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/21/21132/tde-05042007-163945/.

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Um modelo numérico tridimensional foi adaptado para o estudo da circulação gerada pelo vento sobre a plataforma continental da Região Sul do Brasil durante o verão e o outono. O modelo oceânico de Princeton (POM) é usado em um domínio limitado com grade curvilínea de alta-resolução, além de linha de costa e batimetria realísticas. As forçantes são variáveis no tempo e incluem tensão de cisalhamento do vento, descarga fluvial, campos termohalinos e nível médio do mar. Os objetivos são simular a resposta da plataforma a estas forçantes, comparar os resultados do modelo com observações oceanográf

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Freudenberg, Robert, Rudi Apolle, Martin Walther, Holger Hartmann, and Jörg Kotzerke. "Molecular imaging using the theranostic agent 197(m)Hg: phantom measurements and Monte Carlo simulations." Springer Open, 2018. https://tud.qucosa.de/id/qucosa%3A33332.

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Background Radiomercury 197mHg and 197Hg, henceforth referred to as 197(m)Hg, is a promising theranostic radionuclide endowed with properties that allow diagnostic and therapeutic applications. The aim of this work was to investigate the capabilities of 197(m)Hg for nuclear medicine imaging. Therefore measurements were performed by using a Philips BrightView SPECT camera. Furthermore, Monte Carlo simulations using the GATE software were performed to theoretically explore the imaging contribution from the various gamma and X-ray emissions from 197(m)Hg for a commercial clinical camera with low-

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Huang, Chen-Ching, and 黃振卿. "The Empirical Study of Fundus Assessment Cognition by Digital Fundus Camera." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/84972151188387055380.

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碩士<br>中華醫事科技大學<br>視光產業碩士專班<br>103<br>Objective: eye is the only transparent window of human body, through which we can directly observe retinal vessel and optic nerve. Therefore, observation of fundus oculi provides important information for evaluating physical health and vision health. For example, hypertension, diabetes, glaucoma and some blood diseases can be detected via an observation of fundus lesions caused by these diseases. Except eyes, no other parts of human body can be subject to non-invasive examination of living tissues and neural structures under amplification. Fundus camera is

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Liu, Kuei-Chun, and 劉奎均. "Design of Fundus Camera Based on Smartphone." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/tjfew4.

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碩士<br>國立臺灣科技大學<br>色彩與照明科技研究所<br>105<br>The retina of the human eye is distributed with large numbers of microvessels. By the retinal detection, we can obtain the state of the eye disease and the information used for early diagnosis of many other organ diseases such as diabetes, hypertension, heart disease and so on. In many therapeutic methods, retinal photography is one of the non-invasive observation technology of microvascular detection, with safety, health, rapid and reusable. With the popularity of smartphones and the attention of health and preventive care, development of smartphone-base

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Su, Min-Jyun, and 蘇旻俊. "Ultrahigh-resolution Fundus Camera Optical Coherence Tomography for Rat Retina Imaging." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/13873591790953133825.

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碩士<br>國立陽明大學<br>生醫光電研究所<br>105<br>Optical coherence tomography (OCT), introduced in 1991, is a powerful tool that can produce non-contact, non-invasive tomographic images of biological tissues. Clinically, OCT systems have been widely used for diagnoses in ophthalmology. In addition to being applied to humans, OCT is widely used to observe the animal's eyes, including small animal models of various retinal diseases. The diagnostic accuracy in clinical applications and research is dependent on the quality of the imaging, so the ultrahigh-resolution imaging capability is very important especiall

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Nourrit, V., Jonathan Denniss, M. M. Mugit, et al. "High-resolution hyperspectral imaging of the retina with a modified fundus camera." 2018. http://hdl.handle.net/10454/16323.

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No<br>The purpose of the research was to examine the practical feasibility of developing a hyperspectral camera from a Zeiss fundus camera and to illustrate its use in imaging diabetic retinopathy and glaucoma patients. The original light source of the camera was replaced with an external lamp filtered by a fast tunable liquid-crystal filter. The filtered light was then brought into the camera through an optical fiber. The original film camera was replaced by a digital camera. Images were obtained in normals and patients (primary open angle glaucoma, diabetic retinopathy) recruited at the Man

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Anjos, Pedro Filipe dos Santos. "Development of a fundus camera for analysis of photoreceptor directionality in the healthy retina." Master's thesis, 2015. http://hdl.handle.net/10362/15618.

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The Stiles-Crawford effect (SCE) is the well-known phenomenon in which the brightness of light perceived by the human eye depends upon its entrance point in the pupil. This physiological characteristic is due to the directional sensitivity of the cone photoreceptors in the retina and it displays an approximately Gaussian dependency which is altered in a number of pathologies. Retinal imaging, a widely spread clinical practice, may be used to evaluate the SCE and thus serve as diagnostic tool. Nonetheless, its use for such a purpose is still underdeveloped and far from the clinical reality. In

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Piteira, Helena Luís Cortes. "Digital Image Sensor Integration in the Scope of EyeFundusScope: a Retinal Imaging System for Mobile Diabetic Retinopathy Assessment." Master's thesis, 2018. http://hdl.handle.net/10362/82977.

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Diabetic Retinopathy is a pathology, asymptomatic in early stages, that is a consequence of diabetes mellitus, a disease that affects millions of people worldwide. Specifically on people with Diabetic Retinopathy, long periods of hyperglycemia lead to the creation of very fragile blood vessels in the retina, or to the suppression of old ones, leading to problems like hemorrhages or exudates, that may cause blindness. Diabetic Retinopathy can be diagnosed with several devices, but these are mainly too expensive and non-portable, not allowing the screening of a great part of the population

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Melo, David Simões de. "Optical Design of a Retinal Image Acquisition Device for Mobile Diabetic Retinopathy Assessment." Master's thesis, 2017. http://hdl.handle.net/10362/27916.

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Diabetes mellitus is a condition that lead to various systemic alterations. These changes, taking place in the blood vessels cause a progressive capillary occlusion and, in the posterior eye region, provoke leakages from the vessels to the retina leading to a disease called diabetic retinopathy. This pathology ultimately can lead to complete vision loss, which is an aspect that emphasizes the relevance of the work developed in this thesis. The initial progression is asymptomatic, so only in advanced and frequently irreversible stages, the patient becomes aware of the disease. For this re

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LAI, JI-HUI, and 賴吉輝. "Algorithms for evaluation of image acquisition characteristics of fundus cameras." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/94467154040125248029.

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Βλαχοκώστα, Αλεξάνδρα. "Επεξεργασία οφθαλμολογικών εικόνων για μέτρηση διαμέτρων αγγείων". Thesis, 2006. http://nemertes.lis.upatras.gr/jspui/handle/10889/864.

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Σκοπός της παρούσας Διπλωματικής Εργασίας είναι η ανάπτυξη συγκεκριμένης μεθοδολογίας και αλγορίθμων ψηφιακής επεξεργασίας εικόνων για την αυτόματη εκτίμηση των διαμέτρων αγγείων σε οφθαλμολογικές εικόνες. Η συγκεκριμένη μέτρηση της διαμέτρου των αγγείων διαδραματίζει σημαντικό ρόλο στην έγκαιρη διάγνωση παθήσεων καθώς έχει αποδειχθεί ότι υπάρχει συσχετισμός μεταξύ των μεταβολών των τιμών των εν λόγω διαμέτρων και της εμφάνισης αλλοιώσεων στον αμφιβληστροειδή. Στα πλαίσια της εργασίας, υλοποιήθηκαν δύο μεθοδολογίες για τον υπολογισμό των διαμέτρων αγγείων οφθαλμολογικών εικόνων, οι οποίες συ

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