2 research outputs found
Focus estimation in academic environments using Computer Vision
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
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 TelemƔtic