24 documents found, page 1 of 3
In-car damage dirt and stain estimation with RGB images
Dixe, Sandra Manuela Gonçalves; Leite, João; Azadi, Sahar; Faria, Pedro; Mendes, José A.; Fonseca, Jaime C.; Borges, JoãoShared autonomous vehicles (SAV) numbers are going to increase over the next years. The absence of human driver will create a new paradigm for in-car safety. This paper addresses the problem, presenting a monitoring system capable of estimating the state of the car interior, namely the presence of damage, dirt and stains. We propose the use of Semantic Segmentation methods to perform appropriate pixel-wise clas...
A system for the generation of in-car human body pose datasets
Silva, João Pedro Borges Araújo Oliveira; Queirós, Sandro; Oliveira, Bruno; Torres, Helena Daniela Ribeiro; Rodrigues, Nelson; Coelho, VictorWith the advent of autonomous vehicles, detection of the occupants’ posture is crucial to tackle the needs of infotainment interaction or passive safety systems. Generative approaches have been recently proposed for human body pose in-car detection, but this type of approaches requires a large training dataset for a feasible accuracy. This requirement poses a difficulty, given the substantial time required to a...
Automated generation of synthetic in-car dataset for human body pose detection
Borges, João; Oliveira, Bruno; Torres, Helena Daniela Ribeiro; Rodrigues, Nelson; Queirós, Sandro Filipe Monteiro; Shiller, Maximilian; Coelho, VictorIn this paper, a toolchain for the generation of realistic synthetic images for human body pose detection in an in-car environment is proposed. The toolchain creates a customized synthetic environment, comprising human models, car, and camera. Poses are automatically generated for each human, taking into account a per-joint axis Gaussian distribution, constrained by anthropometric and range of motion measuremen...
Top-down human pose estimation with depth images and domain adaptation
Rodrigues, Nelson; Torres, Helena Daniela Ribeiro; Oliveira, Bruno; Borges, João; Queirós, Sandro Filipe Monteiro; Mendes, José A.; Fonseca, Jaime C.In this paper, a method for estimation of human pose is proposed, making use of ToF (Time of Flight) cameras. For this, a YOLO based object detection method was used, to develop a top-down method. In the first stage, a network was developed to detect people in the image. In the second stage, a network was developed to estimate the joints of each person, using the image result from the first stage. We show that ...
Survey and taxonomy of transmissions power control mechanisms for wireless body...
Fernandes, Duarte Manuel Azevedo; Ferreira, Andre G.; Abrishambaf, Reza; Mendes, José A.; Cabral, JorgeWireless Body Area Networks (WBANs) comprise several sensor nodes equipped with a short range radio-frequency transceiver, implanted and/or attached to the human body. Their low form-factor and localization imply less resources available and limited energy capabilities. Therefore, energy efficiency of WBANs is a critical issue since, in many cases, batteries cannot be replaced or recharged, requiring mechanisms...
A low traffic overhead transmission power control for wireless body area networks
Fernandes, Duarte Manuel Azevedo; Ferreira, André Filipe Gonçalves; Abrishambaf, Reza; Mendes, José A.; Cabral, JorgeWireless body area networks are being deployed for an ever increasing number of applications. The main research challenges are still related to the quality of the communication link and to the energy consumption. Since WBAN on-body communication channels' quality varies over time, it is not appropriate to use a static and pre-defined transmission power level (TPL). Nowadays, the vast majority of WBANs use trans...
Energy saving mechanism for a Smart Wearable System: monitoring infants during ...
Fernandes, Duarte; Ferreira, André G.; Branco, Sérgio; Abrishambaf, Reza; Carvalho, Helder; Mendes, José A.; Cabral, Jorge; Rocha, A. M.In Smart Wearable Systems (SWS), the wearable devices are powered by batteries with very limited energy available. These emergent systems have strong Quality of Service (QoS) requirements, with focus on reliable communication and low power consumption. This is the scope of the Baby Night Watch, a project developed in the context of the European Texas Instruments Innovation Challenge (TIIC) 2015. This Project co...
Co-designed FreeRTOS deployed on FPGA
Pereira, J.; Oliveira, D.; Pinto, S.; Cardoso, Nuno; Silva, V.; Gomes, T.; Mendes, José A.; Cardoso, PauloMost embedded systems are bound to real-time constraints. Two of the critical metrics presented in these systems are determinism and latency. Due to growing in complexity of embedded applications, real time operating systems (RTOS) are needed, not only to hide the increasingly complex hardware, but also to provide services to the system’s running tasks. Unfortunately, this new layer on an embedded system puts m...
A wireless body sensor network based on dynamic power control and opportunistic...
Fernandes, Duarte Manuel Azevedo; Ferreira, André; Mendes, José A.; Cabral, JorgeThe usage and deployment of Wireless Body Sensor Networks (WBSN) as a part of Cyber-Physical Systems (CPS) are rapidly increasing in many different real-time monitoring and applications. This emergent network has strong Quality of Service (QoS) requirements and, as it is a recent field of research, it is not yet clear if these requirements can be guaranteed in severe fading and external RF interference conditio...
A wireless Sensor Network for collision detection on guardrails
Miranda, Jorge Miguel Pereira Coutada; Gomes, Tiago Manuel Ribeiro; Abrishambaf, Reza; Loureiro, Isabel F.; Mendes, José A.; Cabral, JorgeThis paper presents a real-Time system based on Wireless Sensor Network (WSN) capable of detecting collisions of vehicles with motorways' guardrails. The system is based on Service Oriented Architecture (SOA) with web services, where the WSN and other applications, like alarm systems and management of WSNs, are connected. It is also presented a simulation based mathematical model using finite element methods, i...