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1
Aufderheide, Dominik. "VISrec! : visual-inertial sensor fusion for 3D scene reconstruction." Thesis, University of Bolton, 2014. http://ubir.bolton.ac.uk/649/.
Повний текст джерелаАнотація:
The self-acting generation of three-dimensional models, by analysing monocular image streams from standard cameras, is one fundamental problem in the field of computer vision. A prerequisite for the scene modelling is the computation of the camera pose for the different frames of the sequence. Several techniques and methodologies have been introduced during the last decade to solve this classical Structure from Motion (SfM) problem, which incorporates camera egomotion estimation and subsequent recovery of 3D scene structure. However the applicability of those approaches to real world devices and applications is still limited, due to non-satisfactorily properties in terms of computational costs, accuracy and robustness. Thus tactile systems and laser scanners are still the predominantly used methods in industry for 3D measurements. This thesis suggests a novel framework for 3D scene reconstruction based on visual-inertial measurements and a corresponding sensor fusion framework. The integration of additional modalities, such as inertial measurements, are useful to compensate for typical problems of systems which rely only on visual information. The complete system is implemented based on a generic framework for designing Multi-Sensor Data Fusion (MSDF) systems. It is demonstrated that the incorporation of inertial measurements into a visual-inertial sensor fusion scheme for scene reconstruction (VISrec!) outperforms classical methods in terms of robustness and accuracy. It can be shown that the combination of visual and inertial modalities for scene reconstruction allows a reduction of the mean reconstruction error of typical scenes by up to 30%. Furthermore, the number of 3D feature points, which can be successfully reconstructed can be nearly doubled. In addition range and RGB-D sensors have been successfully incorporated into the VISrec! scheme proving the general applicability of the framework. By this it is possible to increase the number of 3D points within the reconstructed point cloud by a factor of five hundred if compared to standard visual SfM. Finally the applicability of the VISrec!-sensor to a specific industrial problem, in corporation with a local company, for reverse engineering of tailor-made car racing components demonstrates the usefulness of the developed system.
2
Pereira, Mariana Sant'Anna. "A integração da informação visual e espacial na memória de trabalho: evidências baseadas no efeito do ruído visual dinâmico." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/59/59134/tde-29112012-141651/.
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Neste projeto investigamos a memória para as informações visual e espacial armazenadas separadamente e de forma conjugada, utilizando o ruído visual dinâmico (RVD) como interferência seletiva. No experimento 1 foi estudado o efeito do (RVD) sobre o desempenho de uma tarefa de memória visual e de memória espacial em situações nas quais essas informações foram apresentadas separadamente. Os resultados mostraram efeito generalizado do RVD em ambas as tarefas de memória, o que levou-nos a questionar a validade da tarefa espacial. No segundo experimento foi realizada uma padronização dos estímulos e parâmetros experimentais desta tarefa. Como esperado, o ruído afetou somente a condição visual. Para verificar o efeito do RVD em uma tarefa de memória para a conjunção visuoespacial foi delineado um terceiro experimento no qual a memória para as características isoladas foi comparada com a memória para a conjunção, sob efeito do ruído. A hipótese era de que se o RVD afetasse a memória espacial em uma tarefa de conjunção visuoespacial, isto seria uma evidência de que aparência visual e posição espacial são armazenados de forma integrada, em uma representação única. Esta hipótese foi confirmada pelos resultados: o ruído afetou a conjunção de informações, independentemente de qual característica (se visual ou espacial) indicava a resposta de rejeição correta na tarefa de reconhecimento da conjunção. Este estudo mostrou evidências de que a memória para a informação isolada é diferente da memória para as informações integradas. Além disto, foi possível demonstrar que uma interferência específica ao armazenador visual (ruído visual dinâmico) afetou a memória para a conjunção visuoespacial. Este resultado é uma evidência de que é formada uma imagem visual da integração visual-espacial. Esta imagem é mantida na consciência, em um sistema que é vulnerável às interferências da percepção, como as ocasionadas pelo ruído visual dinâmico.In this work we investigate visual and spatial memory information stored separately and combined, using the dynamic visual noise (DVN) as a selective interference. In the experiment 1 we studied the effect of (DVN) on the performance of a visual and spatial memory tasks in situations where these information was presented separately. The results showed an overall DVN effect in both memory tasks, which led us to question the validity of the spatial task. In the second experiment it was performed a standardization of stimuli and experimental parameters of this \"task\". As expected, noise affected only the visual condition. To investigate the DVN effect on a memory task with a visuo-spatial binding it was designed a third experiment in which memory for isolated features was compared with memory binding, under the effect of noise. The hypothesis was that if the DVN affects spatial memory in a visuo-spatial task combination, it would be evidence that the visual appearance and spatial position are stored in an integrated manner in a single representation. This hypothesis was confirmed by the results: the noise affected the binding of information, regardless of what feature (visual or spatial) indicated the rejection response in the task of correct recognition of binding. This study showed that memory for isolated information is different from memory for the integrated information. Moreover, it was demonstrated that a specific interference to the visual cache (dynamic visual noise) affect the memory for the visuo-spatial binding. This result is an evidence that it is formed a visual image of the visuo-spatial binding. This image is maintained in consciousness, in a system that is vulnerable to interference of perception, such as those caused by dynamic visual noise.
3
Dyde, Richard Thomas. "Illusions of visual orientation : comparisons between perceptual and visuo-motor tasks." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/4265/.
Повний текст джерелаАнотація:
The Milner and Goodale (1995) model of dual cortical visual systems suggests that, in the primate cortex, separate neural substrates dominate the tasks of visual perception and visuo-motor control. This model derives from a number of independent sources of evidence: anatomical, physiological and behavioural. Neuropsychological evidence in humans suggests that visual perception and visuo-motor control can be selectively impaired through damage to the ventral and dorsal visual streams respectively. Evidence has emerged that in the healthy human visual cortex, differentiable effects of visual illusions can be found between the two measures of perception and visuo- motor control. This evidence has been cited to support the Milner and Goodale (1995) model. The series of studies reported in this dissertation used a similar, but methodologically revised application of the illusion paradigm in the novel domain of orientation. Using two types of visual illusions, the simultaneous tilt illusion (STI) and the rod-and-frame illusion (RFI), a series of studies found patterns of association, dissociation and interaction that strongly support the Mihier and Goodale model. The critical issue, in terms of predicting the pattern of effects across perception and visuo-motor control tasks, was found to be the siting of the causal mechanisms underlying the illusion employed.
4
Damaso, Renato de Sousa. "Implementacao de Controle Servo Visual eCoordenacao Visuo-Motora em Robos Manipuladores." Universidade Federal do Espírito Santo, 2006. http://repositorio.ufes.br/handle/10/4106.
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Previous issue date: 2006-05-12Neste trabalho são investigadas estratégias para o controle de manipuladores, usando realimentação por visão, na realização da tarefa de aproximação e agarre de um objeto em seu entorno. Primordialmente, são tratadas estratégias que dispensem a necessidade de modelos prévios de correlação entre o espaço visual e o espaço motor. São apresentados e analisados resultados das implementações experimentais realizadas com um robô industrial e com um protótipo de manipulador. A principal contribuição desta tese de doutorado é a proposição de uma estratégia para a construção experimental e incremental do modelo visuo-motor para manipuladores realimentados por visão binocular, sendo necessário um número relativamente reduzido de experimentos. São propostas duas estruturas de dados para armazenar as informações estimadas, sendo uma endereçada pelo extremo operativo do manipulador e a outra pela posição do objeto. O modelo obtido é utilizado na coordenação do manipulador para a realização da tarefa de interesse. O arranjo é capaz de adaptar o modelo visuo-motor a mudanças no manipulador ou no sistema de visão, e de lembrar-se de informações inferidas em experimentos anteriores. O método de construção incremental do modelo visuo-motor é confrontado com um método de atualização iterativa do jacobiano. Ao final, são apresentados resultados destes dois métodos implementados na mesma plataforma experimental.
5
Pereira, Fabio Irigon. "High precision monocular visual odometry." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/183233.
Повний текст джерелаАнотація:
Extrair informação de profundidade a partir de imagens bidimensionais é um importante problema na área de visão computacional. Diversas aplicações se beneficiam desta classe de algoritmos tais como: robótica, a indústria de entretenimento, aplicações médicas para diagnóstico e confecção de próteses e até mesmo exploração interplanetária. Esta aplicação pode ser dividida em duas etapas interdependentes: a estimação da posição e orientação da câmera no momento em que a imagem foi gerada, e a estimativa da estrutura tridimensional da cena. Este trabalho foca em técnicas de visão computacional usadas para estimar a trajetória de um veículo equipado com uma câmera, problema conhecido como odometria visual. Para obter medidas objetivas de eficiência e precisão, e poder comparar os resultados obtidos com o estado da arte, uma base de dados de alta precisão, bastante utilizada pela comunidade científica foi utilizada. No curso deste trabalho novas técnicas para rastreamento de detalhes, estimativa de posição de câmera, cálculo de posição 3D de pontos e recuperação de escala são propostos. Os resultados alcançados superam os mais bem ranqueados trabalhos na base de dados escolhida até o momento da publicação desta tese.Recovering three-dimensional information from bi-dimensional images is an important problem in computer vision that finds several applications in our society. Robotics, entertainment industry, medical diagnose and prosthesis, and even interplanetary exploration benefit from vision based 3D estimation. The problem can be divided in two interdependent operations: estimating the camera position and orientation when each image was produced, and estimating the 3D scene structure. This work focuses on computer vision techniques, used to estimate the trajectory of a vehicle equipped camera, a problem known as visual odometry. In order to provide an objective measure of estimation efficiency and to compare the achieved results to the state-of-the-art works in visual odometry a high precision popular dataset was selected and used. In the course of this work new techniques for image feature tracking, camera pose estimation, point 3D position calculation and scale recovery are proposed. The achieved results outperform the best ranked results in the popular chosen dataset.
6
Wallin, Catharina. "Att visa gamla gårdar. Vad är det egentligen man visar?" Thesis, Uppsala University, Department of ALM, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-101920.
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7
Taylor, Paul. "Priming of actions by seen objects and body parts : visuo-motor and motor-visual effects." Thesis, Lancaster University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421971.
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8
Rodrigues, Pedro Filipe da Silva. "The influence of the visual surrounding environment in visuo-spatial cognitive tasks: a developmental study." Doctoral thesis, Universidade de Aveiro, 2018. http://hdl.handle.net/10773/23732.
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Doutoramento em PsicologiaA distração visual é amplamente estudada em diversos grupos etários. Habitualmente, nessas investigações, os estímulos-alvo e os distratores são apresentados no mesmo display visual (e.g., no ecrã do computador), um procedimento que parece reproduzir insatisfatoriamente as condições diárias em que atuamos. No nosso dia-a-dia, as tarefas são frequentemente realizadas em ambientes que nos cercam com diversos estímulos visuais; contudo pouco se sabe sobre a sua influência concreta no nosso desempenho cognitivo. O objetivo principal deste projeto foi desenvolver um procedimento mais ecológico que permita o estudo da distração visual em diferentes grupos etários e que melhor represente as condições que encontramos na nossa vida diária. Para isso, criámos dois ambientes, manipulados de uma forma controlada, onde os participantes realizaram um conjunto de tarefas cognitivas visuo-espaciais básicas. Concretamente, desenvolvemos dois ambientes circundantes, um de alta carga visual e outro de baixa carga visual, nos quais crianças (8-12 anos), adolescentes (13-17 anos), jovens adultos (18-29 anos) e idosos (≥ 65 anos), realizaram as tarefas cognitivas. Seguindo um desenho experimental misto, sessenta e quatro participantes de cada grupo etário realizaram duas sessões individuais com um intervalo entre elas de 14-23 dias; uma das sessões foi realizada no ambiente de alta carga visual, enquanto que a outra sessão foi conduzida no ambiente de baixa carga visual. Em cada sessão, os participantes realizaram duas tarefas de atenção (go/no-go e tempos de reação de escolha) e duas de memória (blocos de Corsi e Figura Complexa de Rey). A ordem de aplicação das duas condições ambientais, assim como a ordem de realização das tarefas foi contrabalançada entre os participantes. Alguns instrumentos adicionais foram ainda aplicados para recolha de informação sociodemográfica e para avaliar variáveis individuais (ansiedadeestado, depressão e cronótipo). Em geral, as crianças, os adolescentes e os idosos apresentaram melhor desempenho quando realizaram as tarefas cognitivas no ambiente de baixa carga visual do que no ambiente de alta carga visual. Especificamente, no ambiente de alta carga visual, as crianças apresentaram menor percentagem de hits (go/no-go) e de respostas corretas (tempos de reação de escolha), apresentando igualmente maiores tempos de reação a estas últimas; apresentaram ainda menor desempenho nas duas tarefas de memória. Os adolescentes também tiveram pior desempenho no ambiente de alta carga visual; concretamente, neste ambiente os adolescentes apresentaram, nas tarefas atencionais, menor percentagem de hits e de respostas corretas, assim como maior percentagem de falsos alarmes e de erros; apresentaram ainda pior desempenho nos blocos de Corsi. Os idosos tiveram também pior desempenho no ambiente de alta carga visual, especificamente com menor percentagem de hits e maiores tempos de reação na go/no-go, menor percentagem de respostas corretas e mais erros na tarefa tempos de reação de escolha e pior desempenho nos blocos de Corsi. Nos jovens adultos, não verificámos qualquer influência significativa da manipulação ambiental. Quando analisámos os dados de todos os grupos, os resultados revelaram efeitos principais de grupo etário em todas as variáveis consideradas (tal como previsto), bem como várias interações Ambiente x Grupo-etário. Embora algumas exceções tenham sido encontradas, os resultados descreveram genericamente o padrão habitualmente encontrado nos estudos desenvolvimentais: os idosos e as crianças apresentaram o pior desempenho, seguidos dos adolescentes e finalmente dos jovens adultos que obtiveram o melhor desempenho cognitivo, como esperado. A influência da manipulação ambiental no desempenho cognitivo ocorreu nos três primeiros grupos, tal como expectado. Também apresentamos um breve estudo exploratório, onde averiguámos se o efeito ambiental diferiu quando as variáveis individuais ansiedade-estado, depressão e cronótipo foram consideradas; os resultados nem sempre foram consistentes com as nossas previsões, embora devamos ter cautela com as suas conclusões, dado tratar-se de um estudo puramente exploratório. O presente trabalho propõe um paradigma experimental alternativo para o estudo da distração visual. Este acrescenta mais validade ecológica, fornecendo resultados que provavelmente refletem mais fielmente o que acontece em contextos reais. Os nossos resultados indicam que a manipulação ambiental realizada afeta o desempenho cognitivo em tarefas cognitivas básicas, particularmente em grupos etários mais vulneráveis à influência de potenciais distratores. Os nossos resultados são discutidos à luz das teorias existentes. Implicações práticas e sugestões para estudos futuros são igualmente avançadas
Visual distraction is widely studied in different age groups. Usually, in these research, targets and distractors are shown on the same visual display (e.g., the computer screen), a procedure that hardly mimics the everyday conditions in which we operate. We frequently have to perform tasks in environments that surround us with many visual stimuli but little is known about their specific influence on cognitive performance. The main goal of this project was to develop a more ecological procedure that more closely represented the conditions we face in everyday life to study visual distraction across different age groups. To this end, we created two environments, manipulated in a controlled manner, in which participants responded to a set of basic visuo-spatial cognitive tasks. Specifically, we developed a high-load visual surrounding environment and a low-load visual surrounding environment under which children (8-12 YO), adolescents (13-17 YO), young adults (18-29 YO), and older adults (≥ 65 YO), responded to these tasks. Following a mixed experimental design, sixty-four individuals from each age group participated in two individual sessions with an interval of 14 to 23 days between them: one session was completed in the high-load, whereas the other session was completed in the lowload visual surrounding environment. In each session, participants performed two attentional tasks (go/no-go and choice reaction time) and two memory tasks (Corsi block-tapping and Rey Complex Figure). The orders of the environmental conditions, as well as of the tasks were counterbalanced among participants. Some additional instruments were also applied to collect sociodemographic information and assess individual variables (state-anxiety, depression, and chronotype). Overall, the children, adolescents, and older adults obtained better cognitive performance when the tasks were completed in the low-load as compared with the high-load visual surrounding environment. Specifically, in the later children obtained a lower percentage of hits (go/no-go) and of correct responses (choice reaction time), as well as longer reaction times for the correct responses; they also presented a lower performance in the two memory tasks, when these were performed in the high-load visual surrounding environment. As for the adolescents, when in the high-load environment, they obtained a lower percentage of hits and of correct responses, as well as a higher percentage of false alarms and errors and a lower Corsi span. Performance of the older adults was also lower in the high-load environment, specifically with lower percentage of hits and longer reaction times in the go/no-go task, lower percentage of correct responses and more errors in the choice reaction time, as well as lower performance in the Corsi block-tapping task. Performance of the young adults was not significantly influenced by our environmental manipulation. When the data were analyzed across all age groups, the results revealed main effects of age group in all of the considered variables (as expected), as well as several Environment x Age-group interactions. Although some exceptions were found, in general, the results described the pattern of results usually found in developmental studies: the older adults and the children presented the lowest cognitive performance, followed by the adolescents, and finally by the young adults who obtained the best cognitive performance, as predicted. The former three groups were also the ones that were influenced by our environmental manipulation, as expected. We also briefly explored if the effect of our environmental manipulation differed when the individual variables of stateanxiety, depression, and chronotype were considered; the findings were not always consistent with our predictions although not firm conclusions should be drawn from these exploratory analyzes. The current work proposes an alternative experimental paradigm to study visual distraction that more likely reflects what occurs in real settings, adding more ecological validity to this area of research. Our results indicate that such manipulation disrupts performance in basic cognitive tasks, particularly in the age groups that are more vulnerable to the influence of potential distractors. Our results are discussed in light of the existent theories. Practical implications and suggestions for future studies are also mentioned.
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Konijnenberg, Jacobus Jannes. "Visuo-vestibular interaction using rotatory chair and asynchronously moving visual target (normals, vestibular patients, whiplash patients)." [Maastricht : Maastricht : Rijksuniversiteit Limburg] ; University Library, Maastricht University [Host], 1993. http://arno.unimaas.nl/show.cgi?fid=5749.
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Visani, Muriel Jolion Jean-Michel Garcia Christophe. "Vers de nouvelles approches discriminantes pour la reconnaissance automatique de visages." Villeurbanne : Doc'INSA, 2006. http://docinsa.insa-lyon.fr/these/pont.php?id=visani.
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Kuhn, Caroline [Verfasser], and Georg [Akademischer Betreuer] Kerkhoff. "Effects of homonymous visual field defects on visuo-spatial perception and performance / Caroline Kuhn. Betreuer: Georg Kerkhoff." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2015. http://d-nb.info/107386832X/34.
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Santos, Ana Cláudia Oliveira dos Santos. "Respostas autonômicas e eletroencefalográfica no desempenho de jovens em testes de memória operacional visual e visuo-espacial." reponame:Repositório Institucional da UnB, 2011. http://repositorio.unb.br/handle/10482/11051.
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Tese (doutorado)—Universidade de Brasília, Faculdade de Ciências da Saúde, Programa de Pós-Graduação em Ciências da Saúde, 2011.Submitted by Alaíde Gonçalves dos Santos (alaide@unb.br) on 2012-06-08T15:05:09Z No. of bitstreams: 1 2011_AnaClaudiaOliveiraGarciadosSantos.pdf: 4817070 bytes, checksum: e65677db730033d35d5f188d4df0795b (MD5)
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Funções executivas são produtos de interações dinâmicas entre circuitos frontais e processos cognitivos que relacionam habilidades de planejar uma ação. agir orientado por um objetivo e avaliar o seu resultado. Este complexo pode ser explicado por mecanismos de memória operacional que são destinados a resolução de problemas, manipulando informações online. O fator emocional constitui elemento importante neste processo no apoio na tomada de decisão. Esta colaboração traz a contribuição de substratos do sistema nervoso periférico, qualificando a relação entre cognição e emoção. A hipótese deste trabalho é a de que o desempenho da memória operacional em diferentes contextos - visual e visuo-espacial - é facilitado pelo aleitamento de estímulos com conteúdo emocional. E, ainda, que atividades do sistema nervoso periférico - cardíaca, eletrodérmica e muscular - são diretamente proporcionais ao esforço cognitivo. Este estudo avaliou manifestações eletrofisiológicas - eletroencefalográficas, eletrocardiográficas, eletrodérmicas, eletromiográficas - em jovens durante o desempenho de dois testes de memória operacional: teste de escolha de acordo com/diferente do modelo (N=54; 26 Homens; Idade média: 22,08 +/- 2,448) e teste de reconhecimento espacial com atraso (N=50; 25 Homens; Idade média: 22.04 +/- 2,491). Foram utilizados estímulos emocionais (positivos e negativos) e estímulos não emocionais (neutros e figuras geométricas). A atividade cortical foi similar para os dois testes apresentando ativação fronto-parietal nas bandas teta e alfa, induzida pela representação da informação e processos de atenção, e ativação frontal e temporal nas bandas beta e gama, indicando as condições de maior esforço cognitivo e sugerindo uma possível interação com o hipocampo. A memória operacional visual mostrou lateralidade direita na ativação frontal, enquanto a visuo-espacial, lateralidade esquerda. A atividade cardíaca foi consistente com o esforço cognitivo em ambos os testes, enquanto a atividade eletrodérmica refletiu um balanço entre o esforço cognitivo e a carga emocional. As atividades musculares faciais - superciliar e zigomático - acompanharam o esforço cognitivo em cada resposta ao teste. Os estímulos geométricos demonstraram desempenho abaixo das outras categorias em ambos os testes. Os resultados apontam um estudo eletrofisiológico de manifestações dos sistemas nervoso central e periférico evidenciando a interação entre cognição e emoção em funções executivas. Ainda poderão ser avaliadas as atividades corticais referentes à categoria dos estímulos, relacionando também o tempo de resposta em cada teste. ______________________________________________________________________________ ABSTRACT
Executive functions are product of dynamic interactions between frontal circuits and cognitive processes that relate skills to plan an action, a goal-oriented acting and evaluate its outcome. This complex can be explained by mechanisms of working memory that are allocated to problem solving, manipulating online information. The emotional factor in this process is an important element in the information representation and decision making support. This collaboration brings the contribution of substrates of the peripheral nervous system, qualifying the relationship between cognition and emotion. The hypothesis is that the performance of working memory in different contexts - visual and visual-spatial - is facilitated by arousal stimuli with emotional content. And yet. that the peripheral nervous system activities - cardio, electrodermal and muscular - are directly proportional to cognitive effort. This study evaluated the electrophysiological demonstrations in young people during the performance of two working memory tasks: delayed matching/non-matching to sample (N=54; 26 Male; Mean age: 22,08 +/- 2,448) and delayed recognition span test (N=50; 25 Male; Mean age: 22,04 +/- 2,491). The content of each stimulus was either emotional (positive and negative) or non-emotional (neutral and geometric figures). The cortical activity was similar for both test showing fronto-parietal activation in theta and alpha bands induced by the information representation and attention processes, and frontal and temporal activation in beta and gamma bands, indicating task conditions of higher cognitive effort and suggesting a possible interaction with the hippocampus. The visual working memory showed right frontal activation, while left for the visuo-spatial one. The autonomic responses were generally higher in conditions of higher cognitive effort and when there was a difference for most emotional charge. The muscle activity accompanied cognitive effort responses to each test. The geometric stimuli demonstrated performance under the other categories on visuo-spatial working memory test. The results show an electrophysiological study of manifestations of central and peripheral nervous systems showing the interaction between cognition and emotion in executive functions. As future work, it would be interesting evaluate cortical activities related to the category of stimuli, and associating also the response time for each test.
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Delaux, Alexandre. "Mobile brain imaging to study visuo-spatial perception with ecological paradigms. Applications to healthy aging and visual restoration." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS381.pdf.
Повний текст джерелаАнотація:
En constatant l'influence de la nature tridimensionnelle et multisensorielle du monde sur le fonctionnement du cerveau, ce projet s'est axé sur l'étude de la cognition humaine par le biais d'expériences écologiques, en particulier la perception visuelle et la navigation. Les outils de neuro-imagerie actuels entravent la mobilité des participants et ne reflètent donc pas toute la complexité des activités du quotidien. Pour y remédier, ce projet a développé des méthodes d'acquisition et d'interprétation de l'activité cérébrale dans des conditions de mobilité. À cette fin, de récents progrès techniques ont été mobilisés pour garantir l’extraction robuste des signaux cérébraux issus d’enregistrements d'électro-encéphalographie (EEG) pendant le mouvement. Pour enrichir l'interprétation de la dynamique corticale en exploitant pleinement la résolution temporelle accrue de l'EEG, l'approche mobile brain/body imaging a été adoptée, préconisant le couplage des données EEG avec des mesures biométriques telles que les mouvements du corps et des yeux. L'objectif principal de cette thèse était de mieux comprendre les changements dans la cognition visuo-spatiale au cours du vieillissement sain. L’orientation dans l’espace, une aptitude essentielle au quotidien, repose sur l'intégration de multiples signaux sensoriels, parmi lesquels la vision est centrale. Une forte motivation à étudier ce sujet est que le vieillissement est associé à un déclin des capacités d’orientation, ce qui affecte l'autonomie et le bien-être des personnes âgées et peut mener à l'isolement et à des troubles neurodégénératifs. En étant plus proches des conditions écologiques de la navigation, les résultats obtenus remettent en question certains points de vue établis de la littérature. Ils apportent un nouvel éclairage sur la dynamique des mécanismes neuronaux sous-tendant les aptitudes visuo-spatiales, et en particulier dans les régions sélectives aux scènes. En rapportant un contrôle déficient de l'attention, évident au niveau cortical, associé à une tendance systématique à regarder vers le bas, ils illustrent les effets néfastes du vieillissement visuel sur la navigation. En outre, ce projet s'est intéressé au potentiel de l’EEG mobile pour évaluer des thérapies de restauration visuelle au cours de tâches visuo-spatiales pertinentes pour les activités quotidiennes. Étudier les marqueurs corticaux associés à la récupération visuelle favorise une analyse objective de leur efficacité. En particulier, l'analyse EEG a mis en évidence un rythme alpha occipital, typique du traitement normal de l’information visuelle, induit par une nouvelle thérapie optogénétique chez un patient atteint de rétinite pigmentaire. Ces résultats peuvent avoir des implications socio-économiques substantielles étant donné le vieillissement de la population mondiale et l'augmentation associée de la prévalence des troubles visuels. Les fruits de cette recherche pourront se traduire en recommandations en matière d'urbanisme pour favoriser l’orientation des personnes âgées dans des environnements complexes. Ils pourront également servir à développer des thérapies de restauration visuelle plus efficaces afin d’accroître leur impact dans la vie quotidienne des patients. En conclusion, ces travaux soulignent l'importance des expériences écologiques pour comprendre la cognition et la perception humaine. En s'appuyant sur l'EEG mobile et des paradigmes innovants, ils ont contribué aux domaines de la cognition visuo-spatiale, du vieillissement sain et de la restauration visuelle. Ces résultats peuvent avoir des répercussions sur l'amélioration de l'autonomie des personnes âgées et des patients malvoyants. Cette thèse a été réalisée au sein d'un écosystème collaboratif, bénéficiant des ressources et de l'expertise de l'Institut de la Vision de Paris. La coopération avec d'autres instances de recherche a largement contribué à enrichir son approche méthodologique et à élargir le champ de ses applicationsBased on the observation that the three-dimensional and multisensory nature of the world shapes the functioning of the brain, this doctoral project focused on the study of human cognition through ecological experiments, particularly in the context of visual perception and spatial navigation. Current neuroimaging tools restrict the mobility of participants and thus fail to capture the full complexity of everyday activities. In order to overcome these limitations, this project developed methods to acquire and interpret brain activity under mobile conditions. To this end, recent technological improvements were leveraged to facilitate robust extraction of brain-related signals from electro-encephalography (EEG) recordings during motion. To deepen the interpretation of cortical dynamics by fully exploiting the potential of the improved temporal resolution of EEG, the mobile brain/body imaging approach was adopted, which advocates the co-registration of neural recordings with biometric measures such as body and eye movements. The primary goal of this thesis was to better understand changes in visuo-spatial cognition during healthy aging. Spatial navigation, a ubiquitous skill in everyday life, relies on the integration of multiple sensory inputs, among which vision plays a central role. A major motivation for research on this topic is that aging is associated with a decline in navigational abilities, which affects the autonomy and well-being of older adults and may lead to isolation and neurodegenerative disorders such as Alzheimer's disease. By adopting an approach that considers more ecological aspects of spatial navigation, the results of this work challenge some established views in the literature on visuo-spatial cognition. They provide novel insights into the dynamic neural mechanisms underlying spatial behavior, and in particular into the scene-selective regions whose activity was modulated by expectations generated by natural environments. By illustrating how a downward gaze bias may interact with an impaired control of attention evident at the cortical level, they shed light on the detrimental effects of visual aging on navigation. Furthermore, this project addressed the potential of mobile neuroimaging tools in the evaluation of visual restoration therapies for retinal diseases while patients performed visuo-spatial tasks relevant to daily activities. The study of neural markers associated with visual recovery promotes an objective assessment of the effectiveness of therapeutic interventions. In particular, EEG frequency analysis helped unravel an occipital alpha rhythm typical of natural visual processing induced by a novel optogenetic therapy in a late-stage retinitis pigmentosa patient. These findings may have substantial socio-economic implications given the aging of the global population and the associated increase in the prevalence of visual disorders. The outcomes of this research may be translated into urban planning recommendations to help older adults navigate complex, unfamiliar environments. They can also contribute to the development of more effective visual restoration therapies, ultimately making a significant difference in the daily lives of low vision patients. In conclusion, this doctoral thesis emphasized the importance of ecological experiments for understanding human cognition and perception. By using mobile EEG and innovative paradigms, it contributed to the fields of visuo-spatial cognition, healthy aging, and visual restoration therapies. Its findings may have broader implications for improving the autonomy of older adults and visually impaired patients. This thesis was carried out within a collaborative ecosystem, benefiting from the resources and expertise of the Paris Vision Institute. Cooperation with other research institutions, both national and international, contributed greatly to enrich its methodological approach and broaden the scope of its applications
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Shah, Neet. "Visual Field Analysis for Functional Visual Loss." Thesis, The University of Arizona, 2018. http://hdl.handle.net/10150/626887.
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Chronicle, Edward Peter. "Visual discomfort and visual dysfunction in migraine." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283940.
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Nelson, Patricia. "Visual Function and Visual Disability in Glaucoma." Thesis, Heriot-Watt University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518609.
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Candido, Jacqueline P. Haslam Elizabeth L. "Visual impairment in a visual medium perspectives of online learners with visual impairments /." Philadelphia, Pa. : Drexel University, 2008. http://hdl.handle.net/1860/2932.
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Contreras, R. Sandra V. "Strategic aesthetics in advertising campaigns : implications for art direction education." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/53222/1/Sandra_Romero_Thesis.pdf.
Повний текст джерелаАнотація:
For over half a century art directors within the advertising industry have been adapting to the changes occurring in media, culture and the corporate sector, toward enhancing professional performance and competitiveness. These professionals seldom offer explicit justification about the role images play in effective communication. It is uncertain how this situation affects advertising performance, because advertising has, nevertheless, evolved in parallel to this as an industry able to fabricate new opportunities for itself. However, uncertainties in the formalization of art direction knowledge restrict the possibilities of knowledge transfer in higher education.
The theoretical knowledge supporting advertising art direction has been adapted spontaneously from disciplines that rarely focus on specific aspects related to the production of advertising content, like, for example: marketing communication, design, visual communication, or visual art. Meanwhile, in scholarly research, vast empirical knowledge has been generated about advertising images, but often with limited insight into production expertise. Because art direction is understood as an industry practice and not as an academic discipline, an art direction perspective in scholarly contributions is rare. Scholarly research that is relevant to art direction seldom offers viewpoints to help understand how it is that research outputs may specifically contribute to art direction practices. This thesis is dedicated to formally understanding the knowledge underlying art direction and using it to explore models for visual analysis and knowledge transfer in higher education.
The first three chapters of this thesis offer, firstly, a review of practical and contextual aspects that help define art direction, as a profession and as a component in higher education; secondly, a discussion about visual knowledge; and thirdly, a literature review of theoretical and analytic aspects relevant to art direction knowledge. Drawing on these three chapters, this thesis establishes explicit structures to help in the development of an art direction curriculum in higher education programs. Following these chapters, this thesis explores a theoretical combination of the terms ‘aesthetics’ and ‘strategy’ as foundational notions for the study of art direction. The theoretical exploration of the term ‘strategic aesthetics’ unveils the potential for furthering knowledge in visual commercial practices in general.
The empirical part of this research explores ways in which strategic aesthetics notions can extend to methodologies of visual analysis. Using a combination of content analysis and of structures of interpretive analysis offered in visual anthropology, this research discusses issues of methodological appropriation as it shifts aspects of conventional methodologies to take into consideration paradigms of research that are producer-centred. Sampled out of 2759 still ads from the online databases of Cannes Lions Festival, this study uses an instrumental case study of love-related advertising to facilitate the analysis of content. This part of the research helps understand the limitations and functionality of the theoretical and methodological framework explored in the thesis.
In light of the findings and discussions produced throughout the thesis, this project aims to provide directions for higher education in relation to art direction and highlights potential pathways for further investigation of strategic aesthetics.
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Khalil, Nofal Mohammed. "Investigations of visual function in migraine by visual evoked potentials and visual psychophysical tests." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/8336.
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Havelka, Jelena. "Phonological and visual factors in visual word recognition." Thesis, University of Bristol, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324326.
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Xue, Tianfan. "Exploiting visual motion to understand our visual world." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113978.
Повний текст джерелаАнотація:
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 115-126).
Motion is important for understanding our visual world. The human visual system relies heavily on motion perception to recognize the movement of objects, to infer the 3D geometry of a scene, and to perceive the emotions of other people. Modern computer vision systems also use motion signals extracted from video sequences to infer high-level visual concepts, including human activities and abnormal events. Both human and computer visual systems try to perceive changes in the 3D physical world through its 2D projection, either on the image plane or on our retinas. The observed 2D pixel movement is the result of several factors. First, the image sensor might move, inducing egocentric motion, even when the scene is static. Second, the medium between objects and a camera might change and affect how light transmits from the objects to the sensor, like the shimmering in a hot-road mirage. Finally, the objects in a scene might move, either actively, like a person walking along a street, or passively, like a tree branch that is vibrating due to wind. All of these movements reveal information about our visual world. In this dissertation, we will discuss how to infer physical properties of our visual world from observed 2D movement. First, we show how to infer the depth of a scene from egocentric motion and use this to remove undesired visual obstructions. Second, we relate the slight wiggling motion due to refraction to the movement of hot air and infer the location and velocity of the airflow. Last, we illustrate how to infer the physical properties of objects, such as their deformation space or internal structure, from their motion.
by Tianfan Xue.
Ph. D.
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Owens, Andrew (Andrew Hale). "Learning visual models from paired audio-visual examples." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107352.
Повний текст джерелаАнотація:
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 93-104).
From the clink of a mug placed onto a saucer to the bustle of a busy café, our days are filled with visual experiences that are accompanied by distinctive sounds. In this thesis, we show that these sounds can provide a rich training signal for learning visual models. First, we propose the task of predicting the sound that an object makes when struck as a way of studying physical interactions within a visual scene. We demonstrate this idea by training an algorithm to produce plausible soundtracks for videos in which people hit and scratch objects with a drumstick. Then, with human studies and automated evaluations on recognition tasks, we verify that the sounds produced by the algorithm convey information about actions and material properties. Second, we show that ambient audio - e.g., crashing waves, people speaking in a crowd - can also be used to learn visual models. We train a convolutional neural network to predict a statistical summary of the sounds that occur within a scene, and we demonstrate that the visual representation learned by the model conveys information about objects and scenes.
by Andrew Owens.
Ph. D.
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Ngo, Mary Kim. "Facilitating visual target identification using non-visual cues." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:6e05bfc4-f049-43a3-8ecc-4db38f8cbb09.
Повний текст джерелаАнотація:
The research presented in this thesis was designed to investigate whether and how the temporal synchrony and spatial congruence of non-visual cues with visual targets could work together to improve the discrimination and identification of visual targets in neurologically-healthy adult humans. The speed and accuracy of participants’ responses were compared following the presence or absence of temporally synchronous and/or spatially congruent or incongruent auditory, vibrotactile, and audiotactile cues in the context of dynamic visual search and rapidly-masked visual target identification. The understanding of the effects of auditory, vibrotactile, and audiotactile cues derived from these laboratory-based tasks was then applied to an air traffic control simulation involving the detection and resolution of potential conflicts (represented as visual targets amidst dynamic and cluttered visual stimuli). The results of the experiments reported in this thesis demonstrate that, in the laboratory-based setting, temporally synchronous and spatially informative non-visual cues both gave rise to significant improvements in participants’ performance, and the combination of temporal and spatial cuing gave rise to additional improvements in visual target identification performance. In the real-world setting, however, only the temporally synchronous unimodal auditory and bimodal audiotactile cues gave rise to a consistent facilitation of participants’ visual target detection performance. The mechanisms and accounts proposed to explain the effects of spatial and temporal cuing, namely multisensory integration and attention, are examined and discussed with respect to the observed improvements in participants’ visual target identification performance.
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Li, Qi. "Interactions between Visual Attention and Visual Working Memory." Kyoto University, 2015. http://hdl.handle.net/2433/199403.
Повний текст джерелаАнотація:
Kyoto University (京都大学)0048
新制・課程博士
博士(人間・環境学)
甲第19079号
人博第732号
新制||人||176(附属図書館)
26||人博||732(吉田南総合図書館)
32030
京都大学大学院人間・環境学研究科共生人間学専攻
(主査)教授 齋木 潤, 教授 船橋 新太郎, 准教授 月浦 崇
学位規則第4条第1項該当
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Botelho, Alexandre Monte. "A automatização da discriminação de letras em espelho: um estudo com alunos do 1º ciclo de escolaridade." Master's thesis, Universidade de Évora, 2018. http://hdl.handle.net/10174/24644.
Повний текст джерелаАнотація:
O presente estudo teve como principal objetivo perceber em que momento da aprendizagem da leitura o processamento da orientação de estímulos em espelho, enantiomorfos (e.g., b-d), se torna automático. Participaram na investigação 60 crianças sem dificuldades na leitura, sendo 20 do 2.º ano de escolaridade, 20 do 3.º ano e 20 do 4.º ano. Os alunos realizaram uma tarefa de priming, na qual tinham que decidir se a sequência de letras do estímulo alvo era ou não uma palavra - tarefa de decisão lexical. Explorou-se o efeito da orientação da letra pela comparação do efeito de priming em 4 condições – controlo, idênticas, espelho e rodadas – no processamento de letras reversíveis e irreversíveis. Os resultados sugerem que o processo de automatização da discriminação da orientação das letras em espelho parece não estar automático ainda no 4.º ano de escolaridade, ao contrário das rotações no plano que são processadas automaticamente logo no 2.º ano de escolaridade; Abstract:
The main objective of the present study was to understand at what point in reading acquisition the processing of the orientation of mirror letters, i.e. enantomorphic stimuli (e.g., b-d) becomes automatic. Sixty children with no reading difficulties were testes: 20 2nd-graders, 20 3rd-graders and 20 4th-graders. The students were tested on a priming task in which they had to decide whether a presented sequence of letters was a word or not– lexical decision task. Orientation processing of letters was explored comparing the priming effects across four conditions – control, identity, mirror and rotated – for reversible and non-reversible letters. The results suggest that orientation discrimination of mirror letters may not be automatized in the 4th-grade, which contrasts to the automatic processing of plane rotations in the 2nd-grade.
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Danelljan, Martin. "Visual Tracking." Thesis, Linköpings universitet, Datorseende, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-105659.
Повний текст джерелаАнотація:
Visual tracking is a classical computer vision problem with many important applications in areas such as robotics, surveillance and driver assistance. The task is to follow a target in an image sequence. The target can be any object of interest, for example a human, a car or a football. Humans perform accurate visual tracking with little effort, while it remains a difficult computer vision problem. It imposes major challenges, such as appearance changes, occlusions and background clutter. Visual tracking is thus an open research topic, but significant progress has been made in the last few years. The first part of this thesis explores generic tracking, where nothing is known about the target except for its initial location in the sequence. A specific family of generic trackers that exploit the FFT for faster tracking-by-detection is studied. Among these, the CSK tracker have recently shown obtain competitive performance at extraordinary low computational costs. Three contributions are made to this type of trackers. Firstly, a new method for learning the target appearance is proposed and shown to outperform the original method. Secondly, different color descriptors are investigated for the tracking purpose. Evaluations show that the best descriptor greatly improves the tracking performance. Thirdly, an adaptive dimensionality reduction technique is proposed, which adaptively chooses the most important feature combinations to use. This technique significantly reduces the computational cost of the tracking task. Extensive evaluations show that the proposed tracker outperform state-of-the-art methods in literature, while operating at several times higher frame rate. In the second part of this thesis, the proposed generic tracking method is applied to human tracking in surveillance applications. A causal framework is constructed, that automatically detects and tracks humans in the scene. The system fuses information from generic tracking and state-of-the-art object detection in a Bayesian filtering framework. In addition, the system incorporates the identification and tracking of specific human parts to achieve better robustness and performance. Tracking results are demonstrated on a real-world benchmark sequence.
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Lindberg, Erik. "Visual Inductosyn." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97913.
Повний текст джерелаАнотація:
This is a project where modern visualization techniques are used to create an interactive and animated technical illustration of how the position measuring product Inductosyn works. The project is made on behalf of Inductosyn International, an engineering company in Valhalla, New York. The visualization is focused on the operating principle of the product and the technical benefits of using the product in the two application areas Air Surveillance Radar and Air Defence Systems. The purpose with the project is to create a series of applications the company can use as a complement in marketing to demonstrate the product and visualize its benefits to customers. This report covers the whole process from project background, choice of visualization platform, creating visualization concepts to the implementation and the final results.
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Fullerton, Jeanay. "VISUAL STAMP." Master's thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4017.
Повний текст джерелаАнотація:
I create images in a painterly manner illustrating a visual dialog, which suggests simultaneous moments, yet are actually a separated collision of moments and time. I have stretched these ideas from a slowed manipulation of time, to a calculated capture of segmented moments. My work undermines the importance of the decisive moment theory. This theory was the catalyst for my new series, VISUAL STAMP. "The decisive moment, it is the simultaneous recognition, in a fraction of a second, of the significance of an event as well as the precise organization of forms which gives that event its proper expression." - Henri Cartier-Bresson I am conveying space and time on a single plane in a similar way to how we perceive, process, and retain information visually. The discarded moments in our perception are what I am interested in capturing. We do not view life in a frozen millisecond. Contemporary modes of perception involve the sensorial experience of viewing thousands of movements in small bursts of time that are often left behind, and forgotten. By layering images I am illustrating gaps from one moment to the next. My interest in using the insignificant event to create an aesthetic has become a personal visual stamp. This series embraces the discarded aspects of our visual interpretation of the objects and places we see in everyday life.M.F.A.
Department of Art
Arts and Humanities
Studio Art and the Computer MFA
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RIBEIRO, LARISSA PINHO ALVES. "VISUAL AUTOBIOGRAPHY." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2014. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=30173@1.
Повний текст джерелаАнотація:
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
A partir da década de 1980 foi possível observar uma multiplicação de discursos autobiográficos que impregnou os hábitos, costumes e a produção das indústrias culturais e da pesquisa acadêmica. Esse interesse renovado pelas histórias de vida e pela ideia mesmo de vida como reação frente aos anos de inflacionismo teórico e da defesa violenta da impessoalidade, aponta para algo mais que a simples proliferação de formas, e expressa uma tonalidade particular da subjetividade contemporânea. A expansão do biográfico marca um movimento de retorno à problemática do sujeito, não como reafirmação daquele sujeito cartesiano, moderno, mas como continuidade da crítica a esse modelo. É nesse contexto que se insere essa pesquisa, interessada em explorar, de forma pessoal e experimental, formas de compor autobiografias visuais, ou antibiografias, que não aspirem a reconstrução de uma totalidade, a coerência cronológica, ou a afirmação de um eu testemunhal, mas que estejam empenhadas em dar movimento à existência, e não sentido (direção), e que não busque um sentido (significado), mas se colocar sensível. Para tanto, utilizou-se como ferramenta de pesquisa a experimentação artística através do dispositivo fotográfico, observando, através dessa prática, possibilidades de construção e leitura de uma escrita do eu alternativa.
Since 1980 it was possible to notice a multiplication of autobiographical discourses which impregnated the habits, behaviors and production of the cultural industry and the academic research. This renewed interest for life stories and for the very idea of life itself as a reaction against all the years of theoretical inflationism and the violent defense of impersonality, points to something more than just the simple proliferation of forms, and expresses a particular tone of the contemporary subjectivity. The biographical expansion marks a movement of return to the problematic of the subject, not as a restatement of the Cartesian and modern subject, but as a sequence to the critics against this very model. The present research is founded in this context, interested to explore, in a personal and experimental manner, ways to create visual autobiographies, or antibiographies, that don t aim for a full reconstruction, a chronological coherence, or the affirmation of a testimonial self, but rather to invest in putting existence into motion, instead of giving it guidance and to search not for meaning, but becoming sensitive to it. To do so, was used artistic experimentation through photographical devices as a research tool, observing, through this practice, possibilities of producing and reading an alternative self-writing.
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Kellogg, Christopher James. "Visual memory." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/108869.
Повний текст джерелаАнотація:
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.Includes bibliographical references (leaves 90-92).
Visual memory supports computer vision applications by efficiently storing and retrieving spatiotemporal information. It is a unique combination of databases, spatial representation and indexing, and temporal representation and indexing. This thesis designs a visual memory architecture that meets the requirements of a number of computer vision applications. It also presents an implementation of part of this design in support of a scene monitoring prototype.
by Christopher James Kellogg.
M.S.
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Smithson, Hannah Elizabeth. "Visual masking." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621850.
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Heslyk, Oskar. "Visual Assembly." Thesis, KTH, Arkitektur, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298507.
Повний текст джерелаАнотація:
The project investigates an aesthetic of assembly. It established a visual expression though exploring the relationship between disassembly and assembly in the context of laminated timbers. These explorations are manifested in a learning institution in relationship to an existing CLT factor in Långshyttan. The project becomes a dynamic celebration of assembly and a continuous learning environment as the building continues to disassemble and reassemble to counter the obsolescent of new technological inventions in a rapidly developing industry driven by industrialization and technological determination. The new building feeds of the factory for purely disassembled parts in terms of discarded waste and a pure form of assembly in terms of unprocessed CLT blanks. The production of industrial produced mass timber elements has further moved the production of buildings into factories and the erection of buildings at site consist primarily of an assembly of predesigned parts. Architectural advancements is inseparable from technological paradigms and the production of construction timber should carry with it new architectural expressions.
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Ornoff, Theresa. ""Visual Vessels"." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2593.
Повний текст джерелаАнотація:
In 1989 while our severely ill son lay in our arms my husband and I asked the surgeon what he would do if he were in our shoes. “Play the hand you’re dealt.” he replied. It was not this doctor’s only reference to the gamble life holds for each of us. Based on his advice to us I began to investigate the role that fate and predetermination play in our lives and consequently how much control we have on the outcome of life’s events. A cathartic family portrait piece laid the groundwork for a series of metaphorical portraits as I began to investigate identity. The continued use of identity as my thematic approach has allowed me to record emotional waypoints and personal change throughout my life and to additionally pose questions about what constitutes a portrait. At times this approach thankfully led me to use my art as a visual vessel, a container in which to place my emotional burdens lightening the load while I continued on in my daily life
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Bottomley, Richard. "Visual Intimacy." VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/2664.
Повний текст джерелаАнотація:
My work is designed to visually intrigue and excite while creating a sense of intimacy with the viewer. The inspiration for my paintings, prints, and mixed media pieces are derived from views of flowers and the female form. Sometimes the flowers and forms are presented separately, sometimes they are combined into single works. I experiment with different media and supports, such as acrylic paint and gel transfers on canvas or Plexiglas, drypoint on Plexiglas, and chalk pastels on wood paneling. Compositionally, I often place light, transparent shapes against dark, opaque grounds to create dramatic contrast. I also use a wide range of values, a vivid and varied color palette, and fine detail to attract my viewer’s attention.
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Perez, Wladmir. "Gramática visual." Florianópolis, SC, 2008. http://repositorio.ufsc.br/xmlui/handle/123456789/91497.
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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção.Made available in DSpace on 2012-10-23T23:38:53Z (GMT). No. of bitstreams: 1 250234.pdf: 5259318 bytes, checksum: dedeb3e3e876df8b0e69d70823c44368 (MD5)
Com uma presença quase exclusiva nos meios de comunicação, a imagem como representação visual perpassa todas as áreas e segmentos da sociedade. Representa mais do que um recurso estético no sentido alegórico, assumindo um papel decisivo na construção de significados. O objetivo deste estudo foi identificar os aspectos teóricos e os elementos formais discursivos da representação visual a fim de possibilitar a elaboração de uma sintaxe gramático-visual. Nesse sentido, o universo da Linguagem Visual foi explorado no intuito de entender a dimensão que a estruturação da imagem como linguagem ocupa no processo de comunicação. Este estudo partiu da premissa básica de que independentemente de a imagem como representação visual ter um caráter polissêmico, sua estruturação - a partir do que denominamos de Gramática Visual sustentada a partir das teorias da semiótica, gestalt e estética -, possibilitará reduzir essa polissemia e, conseqüentemente, aumentar o grau de compreensão dos conteúdos das mesmas, portanto, aumentando o grau de objetividade pretendido pelos que se utilizam dela como meio de comunicação. Como base de sustentação às proposições aqui apresentadas, as teorias estéticas, cognitivas, semióticas e filosóficas indicaram os caminhos necessários na constituição de uma Linguagem Visual estruturada. Além disso, acreditamos que a ordenação de determinados conceitos, a revisão de outros e a inserção de novos proporcionou a apresentação de um modelo, que poderemos denominar de "arcabouço" de uma gramática. An almost exclusive presence in the media, the image as a visual representation pervades all areas and segments of society. It represents more than an aesthetic resource in the allegorical sense, assuming a decisive role in the construction of meanings. The objective of this study was to identify the theoretical aspects and discursive formal elements of visual representation in order to enable the elaboration of a grammatical-visual syntax. In this sense, the universe of the Visual Language had been exploited in order to understand the dimension that the structuring of the image as language occupies in the communication process. This study starts from the basic premise that regardless the fact that image as representation has a polysemous character, its structuration - on the basis of what we call Visual Grammar sustained by semiotics, gestaltic and aesthetics theories - would reduce the polysemy and, consequently, increase the level of understanding of its contents, increasing the degree of objectivity intended by those that make use of it as a means of communication. It assumes an aesthetic, cognitive, philosophical and semiotic reflection as a basis and path in the constitution of a structured Visual Language. Furthermore, we believe that the organization of certain concepts, the review of other and the inclusion of new ones provided the presentation of a model we can call the "framework" of a grammar.
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Romo, Cartagena René. "De la reactividad a la interactividad en una obra musical-visual de soporte digital : relaciones entre la música y lo visual aplicadas a una obra musical-visual en tiempo real : "Visus I: Aftermath{}" para cello, electrónica en tiempo real y gráficas interactivas : un primer acercamiento." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/150319.
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Magíster en artes con mención en composición musicalEste escrito aborda las diferentes herramientas (de hardware y software) que podrían manejarse, y busca dar una base mínima de conocimientos para el desarrollo de una obra musical en soporte digital que incluya visuales. Por esto mismo, se reflexionó en torno a las diversas maneras de estrechar las relaciones entre los elementos visuales y sonoros en una obra de estas características, así como en la generación de un sistema interactivo digital que es puesto en diálogo con él intérprete de la obra para llevar a cabo lo planteado en este trabajo. Así se busca generar mecanismos de relaciones y codependencia entre elementos visuales y musicales, los cuales fueron puestos en funcionamiento en la obra “Visus I” para cello, electrónica en tiempo real y gráficas en tiempo real, en cada una de sus 3 partes, mediante el desarrollo de un sistema interactivo que funciona como base para llevar a cabo este objetivo. Es por ello por lo que se abordó el fenómeno de la interactividad digital, la composición visual y como hacer uso de estos elementos en conjunto con el material sonoro para llevar a cabo este objetivo.
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Thulin, Nilsson Linnea. "The Role of Primary Visual Cortex in Visual Awareness." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-11623.
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Despite its great complexity, a great deal is known about the organization and information-processing properties of the visual system. However, the neural correlates of visual awareness are not yet understood. By studying patients with blindsight, the primary visual cortex (V1) has attracted a lot of attention recently. Although this brain area appears to be important for visual awareness, its exact role is still a matter of debate. Interactive models propose a direct role for V1 in generating visual awareness through recurrent processing. Hierarchal models instead propose that awareness is generated in later visual areas and that the role of V1 is limited to transmitting the necessary information to these areas. Interactive and hierarchical models make different predictions and the aim of this thesis is to review the evidence from lesions, perceptual suppression, and transcranial magnetic stimulation (TMS), along with data from internally generated visual awareness in dreams, hallucinations and imagery, this in order to see whether current evidence favor one type of model over the other. A review of the evidence suggests that feedback projections to V1 appear to be important in most cases for visual awareness to arise but it can arise even when V1 is absent.
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Wong, Solomon Kim-Nung Psychology Faculty of Science UNSW. "Linking visual preferences and visual sensitivity to image structure." Awarded by:University of New South Wales. Psychology, 2009. http://handle.unsw.edu.au/1959.4/44842.
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The statistical structure of natural images has sparked interest in regards to both visual processing of such images and the aesthetic responses they elicit. We bring together these two lines of research under the simple proposition that early visual processing, more specifically visual sensitivity, may mediate visual preferences. In our first set of experiments, we measured both visual preference and visual sensitivity in the same observers, using patterns varying in the slope of their amplitude spectrum. Our results found similar functions for both variables, supporting our hypothesis. In a second set of experiments, we investigated the same question with regards to simple spatial frequency variations, and found even more convincing results. We conclude that early visual processing is implicated in visual preference, supporting the recently emerging sensory-based approaches to understanding visual preference.
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Sanderson, Mariana Welly. "Effects of visual degradation on audio-visual speech perception." Thesis, Birkbeck (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404941.
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Audio-visual speech recognition is considered to be a dynamic process that uses auditory and complementary visual speech cues. These are the products of the stream of timed and targeted movements of the articulators in the vocal tract used to produce speech. If the visual aspect of speech is absent or degraded, speech recognition in noise may deteriorate; this was used as a tool to investigate the visual aspect of speech recognition in the following experiments. A series of shadowing and recall experiments assessed the effects of frame rate (temporal) and greyscale level (spatial) variations to the visual aspect of audio-visual presentations of sentences spoken in noisy backgrounds by three, evenly illuminated, speakers. There was a significant decline in shadowing accuracy as the frame rate of presentation fell that was related to the importance of temporal synchrony in audiovisual speech. Shadowing and recall experiments, with recordings from one speaker in two illumination conditions and two greyscale levels, revealed that performance accuracy depended on level of illumination in both tasks, for the audio-visual experimental condition and the audio-alone control condition. Moreover in poor illumination, there was significantly less accurate recall performance at the lower greyscale level. This was related to level of spatial facial information that may be used in speech recognition. Shadowing and recall accuracy of sentence's keywords was related to their degree of visible speech-related movement. Audio-visual shadowing accuracy varied little across the range of movements, but audio-alone shadowing accuracy declined significantly as the degree of movement increased. Visual and auditory target characteristics of words associated with differing audio-visual advantage and degrees of visual movement were determined. The findings were considered in the context of a dynamic model of speech processing, which is dependent on patterns of the timings and targets of the auditory and visual speech signals.
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McAulay, Ian Charles. "Visual descriptors : a design tool for visual impact analysis." Thesis, University of Plymouth, 1988. http://hdl.handle.net/10026.1/2401.
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This study is concerned with the development of a practical and effective form of computer-aided analysis of the visual impact of building development in rural areas. Its contribution is fourfold. Firstly, a conceptual model has been developed for the process of seeing in the context of visual impact analysis. Secondly, a mathematical model for a consistent series of visual descriptors has been devised. Thirdly, a suitable design tool has been devised to make use of visual descriptors in visual impact analysis. Fourthly, visual descriptors have actually been implemented as computer software. The concept of visual impact analysis is defined and placed within the wider context of landscape research. The problems faced by a designer in the context of visual impact analysis are identified and the concept of a 'design tool' is introduced and defined. A number of existing computer software packages, intended or used for visual impact analysis, are reviewed critically. The concept of 'visual descriptors' as measures to be used by designers is introduced and examined critically. A conceptual model is presented for the process of seeing in the context of visual impact analysis. A range of possible measures for use as visual descriptors is presented and developed further into a series of precise definitions. A method of implementing visual descriptors is presented together with formal algorithms for the derivation of eight visual descriptors. A software package incorporating these descriptors is presented and verification and case studies of its use carried out. Visual descriptors, as implemented, are assessed for their effectiveness as a design tool for visual impact analysis.
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Sandy, Shiva S. (Shiva Sean) 1976. "Visual discussions : a visual representation of threaded discussion groups." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/46256.
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Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.Includes bibliographical references (leaves 39-41).
This is an M.Eng thesis, based on software development work done in collaboration with Lotus Development Corp. In this project we are creating a visual overview of ongoing threads of a discussion database. This will allow users to quickly focus their attention to relevant areas of areas in a large information space.
by Shiva S. Sandy.
S.B.and M.Eng.
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King, Michael J. "The Capacity of Visual Working Memory During Visual Search." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1586876852806965.
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Guo, Dalu. "Attention Networks in Visual Question Answering and Visual Dialog." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25079.
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Attention is a substantial mechanism for human to process massive data. It omits the trivial parts and focuses on the important ones. For example, we only need to remember the keywords in a long sentence and the principal objects in an image for rebuilding the sources. Therefore, it is crucial to building an attention network for artificial intelligence to solve the problem as human. This mechanism has been fully explored in the text-based tasks, such as language translation, reading comprehension, and sentimental analysis, as well as the visual-based tasks, such as image recognition, object detection, and action recognition.
In this work, we explore the attention mechanism in the multi-modal tasks, which involve the inputs of both text and image, i.e. visual question answering and visual dialog. It involves three vital components in both tasks, the input question (with history for visual dialog), the given image, and the generated answers. Therefore, three kinds of relationships should be investigated step by step to solve the problem. We first build the attention between words and objects for generating the representation of them, followed by the relationship between the representation and the answers if the general word embedding does not work properly, and the relationship between the representation and the attributes of answers comes last for few-shot learning.
First, the bilinear graph networks revisit the relationship between the words from question and objects for image in the visual question answering task from a graph perspective. The classical bilinear attention networks build a bilinear attention map to extract the joint representation of words and objects but lack fully exploring the relationship between words for complex reasoning. In contrast, our networks model the context of the joint embeddings of words and objects. Two kinds of graphs are investigated, namely image-graph and question-graph. The image-graph transfers features of the detected objects to their related query words, enabling the output nodes to have both semantic and factual information. The question-graph exchanges information between these output nodes from image-graph to amplify the implicit yet important relationship between objects. These two kinds of graphs cooperate with each other, and thus our resulting model can model the relationship and dependency between objects, which leads to the realization of multi-step reasoning.
Then, our novel image-question-answer synergistic network values the role of the answer for precise visual dialog. We extend the traditional one-stage solution to a two-stage solution. In the first stage, candidate answers are coarsely scored according to their relevance to the image and question pair. Afterward, in the second stage, answers with high probability of being correct are re-ranked by synergizing with image and question.
Finally, we propose to learn the representations of attributes from the answers with enough data, which are later composed to constrain the learning of the few-shot ones. We generate the few-shot dataset of VQA with a variety of answers and extract their attributes without any human effort. With this dataset, we build our attribute network to disentangle the attributes by learning their features from parts of the image instead of the whole one.
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Roper, Robyn. "An investigation of the impact of visual culture on visual arts practice and visual arts education." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2005. https://ro.ecu.edu.au/theses/620.
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This research project is based on the premise that school students have a right to an education that assists them to "develop a sense of personal meaning and identity, and be encouraged to reflect critically on the ways in which that occurs." (Curriculum Frameworks, 1998, Values, Statement 2.2 Personal meaning: 325). Not only should education offer students a sense of well being, it should make a difference to their lives and foster an appetite for life long learning. A key ingredient that makes for a rich, fulfilling and rewarding life, is an understanding of visual culture, that according to Freedman (2003:1), "inherently provides context for the visual arts and points to the connections between popular and fine arts forms".
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Pereira, Carla Queiroz. "Linguagem e aspectos visuo-espaciais : uma abordagem neurolinguistica." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/269147.
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Orientador : Maria Irma Hadler CoudryDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Estudos da Linguagem
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Resumo: O objetivo deste trabalho de pesquisa é investigar como o sujeito JS - não afásico após sofrer três acidentes vasculares cerebrais isquêmicos (AVCi¿s) que lesionaram regiões parieto-occipitais de ambos os hemisférios cerebrais - realiza determinadas atividades lingüístico-cognitivas que envolvem aspectos vísuo-espaciais relacionados ao corpo, à escrita, à leitura de textos e de horas. Com base na Neurolingüística discursivamente orientada, na Neuropsicologia luriana e nas bases biológicas da Neuroplasticidade, estuda-se a complexidade dos processos envolvidos em atividades realizadas por JS, destacam-se as estratégias discursivas utilizadas por ele para disfarçar suas dificuldades, bem como os procedimentos clínicos com função terapêutica usados pela investigadora/interlocutora na tentativa de ¿(re)orientar¿ a reflexão de JS sobre as atividades realizadas. O foco deste estudo de caso, portanto, é a relação entre corpo/espaço e linguagem envolvida em atividades que requerem um bom funcionamento dessa relação. Para isso, toma-se como ponto de referência o sujeito que se enuncia para organizar o espaço da enunciação e seu próprio corpo como mediador dessa relação, o que permitiu compreender suas dificuldades e as soluções que encontra. Para análise e discussão dos dados foi utilizada uma metodologia qualitativa e heurística, baseada no paradigma indiciário, compatível com a formulação teóricometodológica de dado-achado. Os dados analisados mostram que JS se beneficiou do acompanhamento longitudinal: em relação a seu corpo, passou a observá-lo mais e a usar as referências que nele existem para determinar as coordenadas espaciais, direita e esquerda, relacionando-as a objetos representados; em relação à escrita, passou a concebê-la de novo como escrita e organizá-la melhor no espaço do papel; em relação à leitura das horas, refaz suas hipóteses na interlocução, havendo maior dificuldade quando a leitura não é feita em seu relógio de pulso, ou seja, quando o corpo não está concernido. Em relação à interlocução, JS revela muita eficácia no jogo da linguagem, transferindo para o outro o ônus da resposta, não apresentando, pois, o ideário de um sujeito com demência
Abstract: The objective of this research is investigating how our non-aphasic subject ¿ JS ¿ behaves after undergoing three ischemic vascular cerebral accidents, the way heaccomplishes some linguistic-cognitive activities evolving visual-spatial aspects related to his body, reading and writing, and time checking on clocks. Based on discursive-oriented Neurolinguistics, on Lurian Neuropsychology and on biological bases of Neuroplasticity, we study the processes complexity evolved in the activities performed by JS. We highlight the discursive strategies he used in order to hide his difficulties, as well as the therapeutically functional clinic procedures employed by the investigator/interlocutor when trying to ¿(re)guide¿ JS reflections about the activities performed. This case study focus is, therefore, the relation established between, on one hand, body/space and, on the other hand, the language required for the good functioning of this relation. Aiming that, we consider, as a reference point, the subject that enunciates himself in order to organize the enunciation space, using his own body as a broker of this relation ¿ which permits the comprehension of his difficulties and the solutions he is able to find. In order to analyze and discuss data, we backed on a qualitative and heuristic methodology, base don the indiciary paradigm, compatible to the theoretical-metodological analisis of ¿found data¿. The data analyzed shows that JS benefited himself from the longitudinal companion: he¿s started to observe his own body, using it to determine special coordinates (like left and right), in order to be able to relate these coordinates to represented objects; regarding writing, he¿s also conceived it as writing in fact; regarding time reading on the clock, he restated his own interlocution, mainly when he was not checking his own watch ¿ i.e., when his own body was not evolved. Regarding interlocution, JS reveals a lot of efficiency in the language game by transferring to his interlocutor the weight of the response ¿ i.e., not showing the ideary of a dement person
Mestrado
Mestre em Linguística
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González, Galleguillos Diego Mauricio. "Estrategias de reconocimiento visual en la percepción del movimiento biológico : exploración visual libre o fijación visual forzada." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/151367.
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Grado de magíster en neurocienciasUno de los movimientos complejos con importancia evolutiva en humanos es el movimiento biológico, definido como un conjunto de puntos de alto contraste que siguen un patrón coherente de movimiento y que involucra un nivel de procesamiento complejo que integra la velocidad, la forma de los objetos en movimiento, interpretando acciones, estímulos sociales y emociones. Se proponen tres hipótesis para entender qué estrategias visuales permiten la percepción del movimiento biológico. Por una parte, a través de un seguimiento ocular continuo que explora el movimiento biológico (“por partes”), por otra, a través de un foco de atención local discontinuo que extrapola la percepción del movimiento biológico sin explorarlo (“un todo”) y una última que integra ambas hipótesis. Estas hipótesis plantean vías de procesamiento en dos fases: la primera de movimientos locales que se integran en regiones corticales sensoriales de fragmentos del cuerpo. Y la segunda, de fragmentos que generan representaciones completas en la corteza multimodal. Existe actualmente una discusión abierta acerca de cuál de estas estrategias es prioritaria para la percepción del movimiento biológico. Para ello se determinó qué estrategias de reconocimiento visual son usadas preferentemente para la percepción del MB observando si existen diferencias en el desempeño conductual de la percepción visual del MB, durante la exploración libre comparada con la fijación forzada de un objetivo mediante el uso de un sistema de seguimiento ocular (“eye tracker”). Según hallazgos de este estudio se puede afirmar que en la muestra evaluada para un mejor desempeño de la percepción del movimiento biológico es necesario el uso de estrategias de exploración visual libre, y esta conducta ocular obedece a lugares estratégicos del movimiento biológico según la valencia de este. Estudios futuros de este paradigma podrían incluir registro de actividad de señales corticales como el uso de EEG, tanto en sujetos sanos como en personas con patologías que afecten la percepción de esta tarea, como en pacientes con esquizofrenia.
One of the complex movements with evolutionary importance in humans is the biological movement, defined as a set of high-contrast points that follow a coherent pattern of motion and involve a complex processing level that integrates speed the form of moving objects, interpreting actions, social stimuli and emotions. Three hypotheses are proposed to understand visual strategies allow the perception of biological movement. On the one hand, through follow-up continuous ocular that explores the biological movement ("by parts"). On the other, to through a discontinuous local focus of attention that extrapolates the perception of biological movement without exploring it ("a whole"). And a last one that integrates both hypothesis these hypotheses are ways of processing in two phases: The first of local movements which are integrated into sensory cortical regions of fragments of the body. The second of fragments generate by complete representations in multimodal crust. There is currently an open discussion about which of these strategies is a priority for the perception of biological movement. For this, it was determined which visual recognition strategies are used preferentially for MB perception by observing if there are differences in behavioral performance of MB visual perception. During the scan-free compared with forced fixation of a target by using an ocular tracking system (eye tracker). According to findings of this study it can be said that use sample evaluated for a better performance of the perception of biological movement It is necessary to use free visual scanning strategies, and this ocular behavior is due to strategic location of biological movement according to the valence of this. Future studies of this paradigm could include recording activity of cortical signals such as the use of EEG, Both in healthy subject as in people with pathologies that affect the perception of this task as in patients with schizophrenia.
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Nürk, Hans-Christoph. "On the importance of visual determinants in visual word recognition." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962385433.
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Hands, Denise Eva. "Assessing visual preferences for industrial rehabilitation using computerised visual simulation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ47329.pdf.
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Al-Bagdady, Mohammad. "Visual development and visual defects in children with Down's syndrome." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54944/.
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This thesis investigated the refractive, accommodative and colour vision status of young people with Down's syndrome (DS). Seven separate studies were conducted. Participants were recruited from the Cardiff Down's Syndrome Vision Research Unit. Abnormal refractive development was reported from an early age, and continued through the first 15 years of life. The normal emmetropisation process was re-aligned to leave subjects with hypermetropic errors, with a wide variation in refractive error, at all ages. There was a specific development of oblique astigmatism with age, which may be associated with the reduced palpebral aperture. Parental refractive status was not found to influence that of their children with DS, although such a relationship was found with their typically developing siblings. The cause of the refractive errors was axial in nature in children with DS. However, general physical growth did not have an active influence in shaping these errors. Bifocal spectacles were found to be a successful treatment for reduced accommodation in children with DS. From the study cohort, over 40% of the children were able to effectively discard bifocal wear after gaining accurate accommodation. Children with DS demonstrated their ability to engage in subjective colour vision testing, given that appropriate tests were used. The design of the Mollon-Reffin 'Minimalist' (M-R) colour vision test was found most suitable. This test showed high sensitivity and specificity in comparison to other clinical tests. Using the M-R test, the prevalence of colour vision defects in DS was found to be comparable to that of the general population. The studies have generated optometric guidelines for the clinical care of people with DS which emphasise the importance of frequent routine clinical examination of this population due to the unpredictive nature of their refractive error development. Examination from an early age will allow for the early detection, and prompt management, of visual problems. Bifocal prescription is highly encouraged for those with reduced accommodation, with cessation of wear being decided from on-going assessment of the patient's accommodation after bifocal prescription.
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Bühler, Frank Stefan. "Combining visual modelling with visual programming for CORBA component development." Thesis, De Montfort University, 2002. http://hdl.handle.net/2086/4068.
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