Pupilometria dinâmica : uma proposta de rastreamento da posição e tamanho da pupila humana em tempo real

• Ano de defesa: 2014
• Autor(a) principal: Dias, Alessandro Gontijo da Costa
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Uberlândia; BR; Programa de Pós-graduação em Engenharia Elétrica; Engenharias; UFU
• Palavras-chave em Português: Rastreamento; Processamento em tempo real; Transformada de Hough; Processamento de imagens; Pupila; Vídeo tracking; Pupilometria; Olhos - Exame; Tracking; Real time processing; Hough transform; Image processing; Pupil; Video tracking; CNPQ::ENGENHARIAS::ENGENHARIA ELETRICA
• Link de acesso: https://repositorio.ufu.br/handle/123456789/14625; https://doi.org/10.14393/ufu.di.2014.4

The study of the pupil\'s movements (contraction and dilatation) has a significant clinical interest because it is used as a method of evaluating both, the human visual system and nervous system. This paper presents a technique that can make the human pupil tracking in real time, both the position and the diameter. That is crucial in extracting parameters related to pupillary movements, and these help in diagnosis of various diseases, among other applications. The suggested technique uses the information of the pupil found in the previous frame, size and position, that are used in an algorithm that aims to reduce the time spent on the next frame tracking. Using this procedure it is possible to make the human pupil tracking in real time, in some cases with an average of up to 140 frames per second. Comparisons with other studies were performed both, for the processing time of each frame and for accuracy in pupil\'s location and diameter found in each image . The pupil\'s position tracking is crucial in extracting parameters related to pupillary movements, and these help in diagnosis of various diseases, among other applications. The present work does not track only the diameter but also the position of the pupil in real time.