Magister Artium - MA / The purpose of the study was to investigate the everyday life information seeking behaviour of visually impaired students at Stellenbosch University. The study framed by the Every Day Life information behaviour model of Pamela McKenzie focused on the information behaviour of visually impaired students, how the visually impaired students obtain their information and the role of the Stellenbosch University library. The study was motivated by the vital need to seek out, listen to and act upon the voices of students with disabilities in an attempt to make higher education more inclusive to students with some form of disability or challenge. Twenty-one visually impaired students from various faculties of Stellenbosch University completed a questionnaire consisting of 23 questions administered by Stellenbosch University’s Braille Office. Students with visual impairments at Stellenbosch University will consult friends, family members and lecturers for information. They needed both personal and academic information. Students found it both easy and difficult to obtain needed academic information. The Internet was the major information resource used by all students. Students relied mainly on online full text journal articles and e-books obtained via the Internet, SU Library’s databases, SunScholar and e-journals for academic information. The main reasons for not using the SU library can be attributed to the inability to use printed resources, lack of facilities for visually impaired students, difficulty in navigating the physical library and lack of training in exploiting the library and its services. All students with visual impairment made use of assistive technology and relied heavily on the support and services of the Braille Office for additional academic information. The everyday behaviour of students with visual impairments at Stellenbosch University conform to McKenzie’s Everyday Life Information Behaviour model as these students sought actively to make contact with sources, identified likely sources, made use of serendipitous encounters, were were identified as information seekers and made use of people as gatekeepers to be referred to a source.

The haptic exploration of 2-D images is a challenging problem in computer haptics. Research on the topic has primarily been focused on the exploration of maps and curves. This thesis describes the design and implementation of a system for the haptic exploration of photographs. The system builds on various research directions related to assistive technology, computer haptics, and image segmentation. An object-level segmentation hierarchy is generated from the source photograph to be rendered haptically as a contour image at multiple levels-of-detail. A tool for the authoring of object-level hierarchies was developed, as well as an innovative type of user interaction by region selection for accurate and efficient image segmentation. According to an objective benchmark measuring how the new method compares with other interactive image segmentation algorithms shows that our region selection interaction is a viable alternative to marker-based interaction. The hierarchy authoring tool combined with precise algorithms for image segmentation can build contour images of the quality necessary for the images to be understood by touch with our system. The system was evaluated with a user study of 24 sighted participants divided in different groups. The first part of the study had participants explore images using haptics and answer questions about them. The second part of the study asked the participants to identify images visually after haptic exploration. Results show that using a segmentation hierarchy supporting multiple levels-of-detail of the same image is beneficial to haptic exploration. As the system gains maturity, it is our goal to make it available to blind users.

Grande parte da população brasileira apresenta condições socioeconômicas desfavoráveis á utilização de recursos de tecnologia assistiva embora possa haver necessidades. O movimento sentado para de pé (ST-DP) é definido operacionalmente como uma transferência bem sucedida do centro de massa (CM) do corpo de uma posição sentada para uma posição estável de pé. A atividade de passar de ST-DP é pré-requisito para a posição vertical, e requer uma complexa coordenação entre o sistema nervoso central e o sistema neuromuscular. Há diversas patologias que comprometem o movimento de passar de sentado para em pé (ST-DP) e vice-versa e que atrapalham o desempenho das atividades de vida diária. Este trabalho objetiva projetar e desenvolver um sistema baseado em barra de apoio, que não exige modificação estrutural das residências, com a função de promover a independência e segurança aos indivíduos no movimento de ST-DP. Baseada na metodologia de projeto foi dividido em cinco fases: informacional (aplicação de questionário com perguntas fechadas e uma dissertativa junto a população alvo); conceitual (pesquisa das especificações necessárias ao desenvolvimento da barra, soluções e decisões); protótipo (elaboração do projeto e desenho da barra, protótipos e avaliação); validação (validação do protótipo) e descontinuidade (descarte após uso). Como resultados conseguiu-se: determinar o modelo e protótipo utilizando o programa CAD solid edge Insight ; classificar os possíveis materiais; dimensionar o sistema baseado em barra de apoio de acordo com os materiais disponíveis e realizar ensaios mecânicos de bancada e testes em pacientes que possibilitaram verificação da aplicabilidade e a facilitação do movimento de passar de ST-DP. O sistema baseado em barra de apoio desenvolvida é de fácil instalação, utiliza materiais renováveis e obteve a eficácia e a opinião favorável dos voluntários ao uso da barra de apoio. Com este trabalho, integraram-se as áreas da saúde e tecnológica em prol da troca do conhecimento técnico entre ambas contribuindo para o desenvolvimento de um produto que objetiva a promoção da independência do(s) indivíduo(s) na realização de suas atividades diárias. / The Brazilian population presents unfavorable socioeconomic conditions the use of assistive technology resources although they need. The movement sitting to standing (STS) is operationally defined as a successful transfer of the center of mass (CM) of the body from a sitting position to a stable upright position. The activity of STS is prerequisite to the vertical position and requires a complex coordination between the central nervous system and the neuromuscular system. There are several diseases that affect the movement of sitting to standing (STS) and vice versa and that hinder the performance of activities of daily living. This work aims to design and develop a system based on support bar that requires no structural modification of households, with the task of promoting the independence and safety for individuals in the movement of STS. Based on the product methodology, was divided into five phases: informational (questionnaires with closed questions and Essay along the target population), conceptual (search specifications necessary for the bar, solutions and decisions); prototyping (project design and bar design, prototyping), evaluation and discontinuity. As results was achieved: determining the prototype model and using the CAD program Insight Solid Edge ; possible to classify the material; dimensioning the system based on support bar according to the materials available and performing mechanical tests and bench testing in patients who enabled verification applicability and facilitating the movement of STS. The system based on support bar is designed for easy installation, uses renewable materials and obtained favorable opinion of the effectiveness and use of volunteers to support bar. This work integrated the health and technology areas in favor of the technical knowledge exchange between both, contributing to the development of a product that aims to promote independence of individual (s) in carrying out their daily activities.

O presente trabalho investiga as diculdades enfrentadas por decientes visuais ao ingressarem em um curso de nvel superior em Música, onde a troca de informacão musical escrita é frequente e se dá por meio de partituras impressas em tinta, e a conversão deste material para braille demanda conhecimentos específicos e disponibilidade de recursos. Igualmente problemática, a produção musical do aluno cego é feita em braille, seja para tomar nota de aulas como para realizar tarefas de disciplinas como Contraponto, Harmonia e Análise Musical, ou mesmo para a realização de exames. Claramente, esse material deve passar por um processo de conversão para que o professor possa avaliar o aluno, entre outros motivos. O foco principal da pesquisa realizada é a analise da musicografia braille sob a ótica das possibilidades de se produzir transcrições automáticas entre partituras em braille e tinta, a fim de prover recursos tecnológicos direcionados a solução deste problema. Para tanto, foi desenvolvido um aplicativo capaz de receber informação musical em braille e converê-la para o formato MusicXML, adequado para a leitura a partir de outros aplicativos de notação musical e, consequentemente, a impressão deste material em tinta. Este programa esta sendo distribudo como software livre sob licenca LGPL, contrapondo-se as suas alternativas hoje existentes no mercado. O aplicativo desenvolvido foi utilizado e avaliado por usuarios decientes visuais e com visão normal por meio de um questionário. Os dados foram então analisados, buscando mapear as diferenças nas experiências de uso e verificar necessidades de melhorias e novas funcionalidades, buscando com isso o aprofundamento nas questões pertinentes ao problema e dando suporte a novas pesquisas relativas ao assunto. / This work researches visually-impaired person\'s dificulties when studying music as a university career, where musical information is usually forwarded as ink-printed sheet music and the translation of this material to braille involves specic skills and resource availability. In that sense, the musical production demanded from a blind student is accomplished by using braille notation, for taking notes or producing homework for disciplines like Harmony, Musical Analysis, or even to take tests. Clearly the information produced has to be submitted to a conversion process, and finally it can be reviewed by the professor or other students. The main focus of this research is the understanding of braille music aspects and the problem of generating automatic ink-printed sheet music transcriptions, providing assistive resource for music students. For attaining this goal, an application was developed in order to receive braille music input and translate it to MusicXML format, which can be read by any of the widely MusicXML compatible softwares available for reading, editing and printing music. The program is distributed as free software under LGPL license, as opposed to currently available alternatives. The resulting application was tested by visually-impaired and non-visually impaired users, and reviewed trough the application of a survey. The collected data was analyzed, in search for variations on user experience and checking for software improvement needs, as well as uncovering further relevant matters on this subject.

A Comunicação Alternativa (CA) é a área de conhecimento que pesquisa símbolos, recursos, técnicas e estratégias para desenvolver ou aprimorar a comunicação de pessoas com impossibilidade ou dificuldade de falar e/ou escrever. Tanto usuários como profissionais (terapeutas ocupacionais, fonoaudiólogos e professores) têm necessidade de organizar os recursos de CA no formato de pranchas de comunicação. A construção de pranchas de comunicação é uma atividade que envolve a seleção de elementos gráficos (símbolos gráficos, imagens, desenhos e fotografias), de acordo com as necessidades e objetivos das pessoas que se utilizarão deste recurso. A partir desse cenário, o objetivo desta tese é analisar como um sistema de busca semântica de imagens (pictogramas), capaz de mapear o contexto semântico de domínio específico, poderá aprimorar o SCALA e ampliar o conhecimento acerca de uma Tecnologia Assistiva de Comunicação Alternativa. A partir do objetivo, propôs-se o desenvolvimento de um sistema de busca (SCALAi*) capaz de mapear o contexto semântico de imagens de domínio específico, visando especificar a ontologia, e integra-la a um sistema de busca semântica de imagens, para a construção de pranchas de comunicação no sistema SCALA A metodologia de pesquisa foi de abordagem mixta: pesquisa qualitativa com engenharia de software com o método de Quase Experimento. A pesquisa de cunho tecnológico utilizou a metodologia de Design Centrado no Contexto de Uso para o desenvolvimento do SCALAi*. As oficinas de formação que alicerçaram o Quase Experimento foram realizadas em laboratórios de informática, com a participação de um público de participantes heterogêneo. Os dados foram coletados por meio de instrumentos de observação e protocolos de avaliação respondidos pelos participantes. Os resultados permitiram o desenvolvimento tecnológico do sistema denominado SCALAi* que permite a busca semântica em sistema de Comunicação Alternativa, a construção de uma ontologia de contextos de uso aplicável a sistema de CA, a comprovação da eficiência do sistema de busca nas interações e tempos de construção das pranchas de comunicação e a qualificação do processo de construção, seja em quantidade de pictograma seja em sua organização lógica. A inclusão do SCALAi* em sistema de Comunicação Alternativa se mostrou adequada e eficiente para os usuários, com muita ou nenhuma experiência, em atividades de construção de pranchas comunicação. / The Alternative Communication (AC) is the area of knowledge that researches symbols, resources, techniques and strategies to develop or improve the communication of people with impossibility or difficulty speaking and/or writing. Both users and professionals (occupational therapists, speech therapists and teachers) need to organize CA resources in the form of communication boards. The construction of communication boards is an activity that involves the selection of graphic elements (graphic symbols, images, drawings and photographs), according to the needs and objectives of the people who will use this resource. From this scenario, the aim of this thesis is to analyze how a semantic image search system (pictograms), capable of mapping the specific domain semantic context, can improve the SCALA and increase the knowledge about an Assistive Technology of Alternative Communication. From the objective, the development of a search system (SCALAi*) was proposed, capable of mapping the semantic context of specific domain images, aiming at specifying the ontology, and integrating it into a semantic image search system the construction of communication boards in the SCALA system. The research methodology was a mixed one: qualitative research with software engineering with the Quase Experiment method The research of a technological nature used the methodology of Design Centered in the Context of Use for the development of SCALAi*. The training workshops that founded the Quase Experiment were carried out in computer labs, with the participation of a heterogeneous audience of participants. The data were collected through observation instruments and evaluation protocols answered by the participants. The results allowed the technological development of the system called SCALAi* that allows the semantic search in Alternative Communication system, the construction of an ontology of contexts of use applicable to the CA system, the verification of the efficiency of the search system in the interactions and times of construction of communication boards and the qualification of the construction process, whether in quantity of pictogram or in its logical organization. The inclusion of SCALAi* in the Alternative Communication system proved to be adequate and efficient for users, with or without experience, in communication board construction activities.

abstract: Societal infrastructure is built with vision at the forefront of daily life. For those with severe visual impairments, this creates countless barriers to the participation and enjoyment of life’s opportunities. Technological progress has been both a blessing and a curse in this regard. Digital text together with screen readers and refreshable Braille displays have made whole libraries readily accessible and rideshare tech has made independent mobility more attainable. Simultaneously, screen-based interactions and experiences have only grown in pervasiveness and importance, precluding many of those with visual impairments. Sensory Substituion, the process of substituting an unavailable modality with another one, has shown promise as an alternative to accomodation, but in recent years meaningful strides in Sensory Substitution for vision have declined in frequency. Given recent advances in Computer Vision, this stagnation is especially disconcerting. Designing Sensory Substitution Devices (SSDs) for vision for use in interactive settings that leverage modern Computer Vision techniques presents a variety of challenges including perceptual bandwidth, human-computer-interaction, and person-centered machine learning considerations. To surmount these barriers an approach called Per- sonal Foveated Haptic Gaze (PFHG), is introduced. PFHG consists of two primary components: a human visual system inspired interaction paradigm that is intuitive and flexible enough to generalize to a variety of applications called Foveated Haptic Gaze (FHG), and a person-centered learning component to address the expressivity limitations of most SSDs. This component is called One-Shot Object Detection by Data Augmentation (1SODDA), a one-shot object detection approach that allows a user to specify the objects they are interested in locating visually and with minimal effort realizing an object detection model that does so effectively. The Personal Foveated Haptic Gaze framework was realized in a virtual and real- world application: playing a 3D, interactive, first person video game (DOOM) and finding user-specified real-world objects. User study results found Foveated Haptic Gaze to be an effective and intuitive interface for interacting with dynamic visual world using solely haptics. Additionally, 1SODDA achieves competitive performance among few-shot object detection methods and high-framerate many-shot object de- tectors. The combination of which paves the way for modern Sensory Substitution Devices for vision. / Dissertation/Thesis / Doctoral Dissertation Computer Engineering 2020

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