2 research outputs found

    Focus estimation in academic environments using Computer Vision

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    In this paper we propose a system capable of monitoring studentsā€™ focus through cameras and using Computer Vision algorithms. Experimental results show that our system is capable of identifying students and tracking their focus during a class. At the end of the class, the system outputs graphical feedback to teachers regarding the average level of studentsā€™ focus. Moreover, it can identify lecture periods in which students were less watchful and the corresponding topics that potentially need extra focus. In this paper we start by presenting the architecture of the system, followed by results obtained both during a small-group workshop and a classroom with a large number of attending students. The main goal of this work is to contribute to the transformation of the classroom as a sensing environment, providing information to both teachers and students about their engagement during the class.publishe

    GestĆ£o de conteĆŗdos digitais em mĆŗltiplos monitores

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    With the generalized use of systems for digital contents dissemination arises the opportunity for implementing solutions capable of evaluating audience reaction. This dissertation reflects the implementation of one of those solutions. To this end, the development involved adapting a previously functional digital signage system. In this sense, digital cameras were paired to the content display terminals in order to capture information from the area in front of them. Using computer vision technologies, the terminals detect, in real time, people who appear in the camerasā€™ field of view, and this information is communicated to a server for data extraction. On the server, methods are used to perform face and emotion recognition, and also to extract data indicating the position of the head, which allows the calculation of an attention coefficient. The data is stored in a relational database, and can be consulted through a web platform, where they are presented associated with the contents corresponding to the moment of their capture and extraction. This solution thus allows the evaluation of the impact of the digital contents presented by the system.Com a utilizaĆ§Ć£o generalizada de sistemas de disseminaĆ§Ć£o de conteĆŗdos digitais, surge a oportunidade de implementar soluƧƵes capazes de avaliar a reacĆ§Ć£o do pĆŗblico. Esta dissertaĆ§Ć£o reflete a implementaĆ§Ć£o de uma dessas soluƧƵes. Para isso, o desenvolvimento passou pela adaptaĆ§Ć£o de um sistema de sinalizaĆ§Ć£o digital previamente funcional. Neste sentido, aos terminais de exposiĆ§Ć£o de conteĆŗdos, foram emparelhadas cĆ¢maras digitais de modo a permitir a captaĆ§Ć£o de informaĆ§Ć£o da Ć”rea Ć  frente destes. Com recurso a tecnologias de visĆ£o de computador, os terminais fazem, em tempo real, deteĆ§Ć£o de pessoas que apareƧam no campo de visĆ£o das cĆ¢maras, sendo esta informaĆ§Ć£o comunicada a um servidor para extraĆ§Ć£o de dados. No servidor, sĆ£o utilizados mĆ©todos para realizaĆ§Ć£o de reconhecimento de faces e emoƧƵes, e tambĆ©m Ć© feita extraĆ§Ć£o de dados indicadores da posiĆ§Ć£o da cabeƧa, o que permite o cĆ”lculo de um coeficiente de atenĆ§Ć£o. Os dados sĆ£o guardados numa base de dados relacional e podem ser consultados atravĆ©s de uma plataforma web, onde sĆ£o apresentados associados aos contĆ©udos correspondentes ao momento de captaĆ§Ć£o e extraĆ§Ć£o destes. Esta soluĆ§Ć£o, permite, assim, a avaliaĆ§Ć£o do impacto dos conteĆŗdos digitais apresentados pelo sistema.Mestrado em Engenharia de Computadores e TelemĆ”tic
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