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ROBÓTICA'2001 - Festival Nacional de Robótica
Ribeiro, António FernandoA robótica está a ter um papel cada vez mais importante na vida quotidiana, visto haver uma tendência acentuada a automatizar determinado número de tarefas que podem ser realizas por uma máquina, libertando assim tempo aos humanos para realizarem tarefas mais desejáveis ou nobres. Os robôs industriais (braços manipuladores) estão já relativamente avançados e fiáveis, podendo comprar-se soluções "off-the-shelf" ...
A comparative study of different image features for hand gesture machine learning
Trigueiros, Paulo; Ribeiro, António Fernando; Reis, Luis PauloVision-based hand gesture interfaces require fast and extremely robust hand detection, and gesture recognition. Hand gesture recognition for human computer interaction is an area of active research in computer vision and machine learning. The primary goal of gesture recognition research is to create a system, which can identify specific human gestures and use them to convey information or for device control. In...
Vision-based gesture recognition system for human-computer interaction
Trigueiros, Paulo; Ribeiro, António Fernando; Reis, Luis PauloHand gesture recognition, being a natural way of human computer interaction, is an area of active research in computer vision and machine learning. This is an area with many different possible applications, giving users a simpler and more natural way to communicate with robots/systems interfaces, without the need for extra devices. So, the primary goal of gesture recognition research is to create systems, which...
Vision based referee sign language recognition system for the RoboCup MSL league
Trigueiros, Paulo; Ribeiro, António Fernando; Reis, Luis PauloIn RoboCup Middle Size league (MSL) the main referee uses assisting technology, controlled by a second referee, to support him, in particular for conveying referee decisions for robot players with the help of a wireless communication system. In this paper a vision-based system is introduced, able to interpret dynamic and static gestures of the referee, thus eliminating the need for a second one. The referee's g...
Robot orientation with histograms on MSL
Ribeiro, António Fernando; Lopes, Gil; Pereira, Bruno; Silva, João; Ribeiro, Paulo Rogério de Almeida; Costa, João; Silva, Sérgio; Rodrigues, JoãoOne of the most important tasks on robot soccer is localization. The team robots should self-localize on the 18 x 12 meters soccer field. Since a few years ago the soccer field has increased and the corner posts were removed and that increased the localization task complexity. One important aspect to take care for a proper localization is to find out the robot orientation. This paper proposes a new technique to...
Vision-based hand segmentation techniques for human-robot interaction for real-...
Trigueiros, Paulo; Ribeiro, António Fernando; Lopes, GilOne of the most important tasks in hand recognition applications for human-robot interaction is hand segmen-tation. This work presents a method that uses a Microsoft Kinect camera, for hand localization and segmenta-tion. One important aspect for robot control besides hand localization is hand orientation, which is used in this work to control robot heading direction (left or right) and linear velocity. The sys...
Catadioptric system optimisation for omnidirectional Robocup MSL robots
Lopes, Gil; Ribeiro, António Fernando; Pereira, NinoOmnidirectional Robocup MSL robots often use catadioptric vision systems in order to enable 360º of field view. It comprises an upright camera facing a convex mirror, commonly spherical, parabolic or hyperbolic, that reflects the entire space around the robot. This technique is being used for more than a decade and in a similar way by most teams. Teams upgrade their cameras in order to obtain more and better in...
A golf ball picking robot design and development
Pereira, Nino; Ribeiro, António Fernando; Lopes, Gil; Whitney, Daniel; Lino, JorgeThe golf ball picking task is a daily that requires human intensive labor. This document presents the hardware developing process of an autonomous golf ball picking robot which aims to efficiently perform this task. It has a maintenance capacity of a 25,000 m2 practice field. Compared to a similar device in the market this robot has twice the maximum speed and three times more container capacity.
Robótica’2012 - Festival Nacional de Robótica
Ribeiro, António FernandoNão apenas pela investigação desenvolvida pelas universidades portuguesas, mas também pelo facto de as escolas secundárias muito terem aprendido e dinamizado nos últimos anos. Proliferam os eventos por esse país fora, sendo exemplos a RoboParty, o Micro-Rato, o Robotop, o Robot Bombeiro, o verão no Campus, e outros. Mas o maior evento em Portugal é o Festival Nacional de Robótica, o qual teve a sua primeira edi...
Autonomous golf ball picking robot design and development
Pereira, Nino; Ribeiro, António Fernando; Lopes, Gil; Whitney, Daniel; Lino, JorgeThe golf ball picking task is a daily that requires human intensive labor. This document presents the hardware developing process of an autonomous golf ball picking robot which aims to efficiently perform this task. It has a maintenance capacity of a 25,000 m2 practice field. Compared to a similar device in the market this robot has twice the maximum speed and three times more container capacity.
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