Glare is an unwanted optical phenomenon which affects imaging systems with optics. This paper presents for the first time a set of hyperspectral image (HSI) acquisitions and measurements to verify how glare affects acquired HSI data in standard conditions. We acquired two ColorCheckers (CCs) in three different lighting conditions, with different backgrounds, different exposure times, and different orientations. The reflectance spectra obtained from the imaging system have been compared to pointwise reference measures obtained with contact spectrophotometers. To assess and identify the influence of glare, we present the Glare Effect (GE) index, which compares the contrast of the grayscale patches of the CC in the hyperspectral images with the contrast of the reference spectra of the same patches. We evaluate, in both spatial and spectral domains, the amount of glare affecting every hyperspectral image in each acquisition scenario, clearly evidencing an unwanted light contribution to the reflectance spectra of each point, which increases especially for darker pixels and pixels close to light sources or bright patches.
Augmentative and Alternative Communication (AAC) techniques are employed to mediate communication with people who have communication disorders, as in cases of intellectual disability. Although there are various digital solutions that promote alternative communication options for individuals with communication disorders, only a few of them have been specifically designed or targeted to people with intellectual disability (ID). This work is motivated by the lack of AAC solutions contributing to the rehabilitation processes of individuals with intellectual disability in Brazil. The study presents a mobile-based AAC solution conceived as a tool to assist the rehabilitation process of people with ID. The design was based on user-centered design principles and accessibility standards. The System Usability Scale (SUS) questionnaire was used to evaluate the solution. Four specialists and twenty-five students participated in this study. The proposed solution shows the potential educational value for professionals who assist individuals with intellectual disability in Brazil.
Os comitês do Consórcio World Wide Web -W3C, através das Melhores Práticas para Web Móvel -MWBP, geram continuamente recomendações de acessibilidade que visam melhorar a experiência do usuário na hora de acessar conteúdos em dispositivos móveis. No caso particular das pessoas com deficiência, essas recomendações visam também reduzir o impacto ocasionado pela deficiência. No entanto, constata-se que uma boa parte das soluções existentes não levam em conta esses princípios no desenvolvimento de produtos para esse público. Este trabalho apresenta o desenvolvimento de um aplicativo para tablet, baseado nos princípios da Comunicação Aumentativa e Alternativa (CAA), levando em conta as recomendações de acessibilidade preconizadas pela MWBP, com o objetivo maior de atuar na Educação Especial, contribuindo no processo de avaliação da deficiência intelectual e também no processo de comunicação de crianças que apresentam distúrbios da fala. Cabe destacar que a metodologia de desenvolvimento seguiu o princípio de Projeto Centrado no Usuário, motivo pelo qual o desenvolvimento e avaliação do aplicativo foram realizados em conjunto com profissionais da APAE de Florianópolis.
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