983 results
Search Results
Now showing 1 - 10 of 983
Item A context-aware immersive interface for teleoperation of mobile robots(The Eurographics Association, 2020) Quintas, João; Almeida, LuÃs; Sousa, ElÃsio; Menezes, Paulo; Dias, Paulo and Menezes, PauloIn this paper we present a context-aware immersive teleoperation interface to assist operators during navigation tasks. This new interface strategy aims to address the problems associated with mental overload, often experienced by operators of teleoperated devices. Our approach simplifies the high complexity of information displayed in control rooms. Our approach includes a context-based human-robot interaction framework that detects relevant information and automatically adapts the displayed interface in virtual windshield. Results showed that the proposed approach enhances user immersion while maximizes task performances and minimizes the operator physical and cognitive workload.Item CEIG 2024: Frontmatter(The Eurographics Association, 2024) Marco, Julio; Patow, Gustavo; Marco, Julio; Patow, GustavoItem Enhancing Medical Diagnosis and Treatment Planning through Automated Acquisition and Classification of Bone Fracture Patterns(The Eurographics Association, 2024) Pérez-Cano, Francisco Daniel; Parra-Cabrera, Gema; Camacho-GarcÃa, Rubén; Jiménez, Juan José; Marco, Julio; Patow, GustavoThe extraction of the main features of a fractured bone area enables subsequent virtual reproduction for bone simulations. Exploring the fracture zone for other applications remains largely unexplored in current research. Recreating and analyzing fracture patterns has direct applications in medical training programs for traumatologists, automatic bone fracture reduction algorithms, and diagnostics. Furthermore, pattern classification aids in establishing treatment guidelines that specialists can follow during the surgical process. This paper focuses on the process of obtaining an accurate representation of bone fractures, starting with computed tomography scans, and subsequently classifying these patterns using a convolutional neural network. The proposed methodology aims to streamline the extraction and classification of fractures from clinical cases, contributing to enhanced diagnosis and medical simulation applications.Item Hardware de Visualização orientado para X Windows(The Eurographics Association, 2023) Pereira, J. Paulo; Costa, A. Cardoso; Ferreira, F. Nunes; José TeixeiraO "X Window System" é um dos vários sistemas de gestão de janelas disponÃveis actualmente, tendo a seu favor o facto de ser suportado por um instituto de renome mundial (MIT) e por alguns fabricantes de primeiro plano (DEC, SUN, etc), de ser um sistema aberto e de permitir a implementação de terminais gráficos compatÃveis, com relativa facilidade. Embora não tão "inteligente" quanto o NeWS (enquanto que o X envia comados gráficos para os terminais, o NeWS envia programas POSTSCRIPT, logo com maior compressão e funcionalidade}, tornou-se um standard de facto. A arquitectura gráfica por nós projectada é muito poderosa e foi orientada para permitir uma implementação fácil e eficiente de um servidor de X. Estes objectivos foram conseguidos através da escolha criteriosa do processador gráfico que melhor servisse os nossos objectivos, o que conduziu a um estudo comparativo de alguns de entre os dispositivos deste tipo comercialmente disponÃveis.Item Recreational Motion Simulation: A New Frontier for Virtual Worlds Research(The Eurographics Association, 2021) Williams, Benjamin; Headleand, Christopher J.; Xu, Kai and Turner, MartinMotion simulation is a developing field which continues to grow with the recent incline in commercial virtual reality. Whilst the majority of motion simulation research focuses on flight simulation and training, its utility in recreational settings is often overlooked. Despite this lack of research, the use of motion simulators for recreational purposes spans decades, and is still today one of the most popular applications of motion simulator devices. Furthermore, with the recent development of low-cost motion simulation platforms, consumers have begun to use these devices in the home. Research regarding motion simulation and its effects in recreational experiences is needed now more than ever, and in this position paper we outline several reasons for its importance.Item Faces – Biblioteca de Expressões Faciais(The Eurographics Association, 2021) Faustino, Janete; Cláudio, Ana Paula; Carmo, Maria Beatriz; Chambel, Teresa and Nunes, Nuno and Romao, Teresa and Creissac Campos, JoséA utilização de humanos virtuais inteligentes tem vindo a tornar-se habitual em diversos contextos que combinam contribuições de várias disciplinas, nomeadamente, da Computação Gráfica, da Inteligência Artificial e das Ciências Sociais. A capacidade de transmitir emoções é de fundamental importância para tornar credÃvel a inteligência de um humano virtual. Neste artigo apresenta-se uma biblioteca gráfica de expressões faciais que define um conjunto básico de expressões e é parte integrante de uma plataforma destinada a gerar ambientes virtuais habitados por humanos virtuais inteligentes.Item A Virtual Collaborative Learning Environment(The Eurographics Association, 2022) Ficheman, Irene Karaguilla; Lopes, Roseli de Deus; Krüger, Susana Ester; Xavier Pueyo; Manuel Próspero dos Santos; Luiz VelhoThis paper presents a virtual learning environment developed for music education and includes both individual and collaborative interactive environments. This learning environment is a music composition edutainment software, which is being developed in collaboration between the University of São Paulo, Laboratório de Sistemas Integráveis (LSI) da Escola Politécnica da Universidade de São Paulo (USP) and the São Paulo State Orchestra, Coordenadoria de Programas Educacionais da Orquestra Sinfónica do Estado de São Paulo (OSESP). Recent research in music education as well as new computer and telecommunication technologies are being applied in arder to offer creative virtual learning environments to the students and offer pedagogical toais to the teachers.Item Experiências com Ray Tracing. Necessidade de Arquitecturas Paralelas(The Eurographics Association, 2023) Costa, A. Cardoso; Sousa, A. A.; Ferreira, F. Nunes; José TeixeiraO Ray Tracing e a Radiosity são as técnicas de sÃntese de imagens que, na actualidade, produzem imagens com maior grau de realismo. Um sistema CAD dotado com estas técnicas poderá ser de grande utilidade numa empresa, quer no apoio ao Marketing quer na antevisão de novos modelos. Põem-se alguns problemas de ordem prática na aplicação desta ideia. Por um lado, os tempos de processamento ainda são demasiado longos e, por outro lado, o realismo desejável nas aplicações de marketing ainda não é obtido facilmente (problemas de texturas, iluminação, etc ... ). Pensamos que os algoritmos de Ray Tracing e Radiosity poderão ser paralelizados com vista à diminuição dos tempos de processamento. Interessa pois definir as estratégias possÃveis na implementação desse paralelismo, tanto ao nÃvel de software como ao nÃvel das arquitecturas paralelas especilizadas.Item The use of Virtual Reality in preserving and reactivating immersive audio art installations: the case of Dissonanze Circolari by Roberto Taroni(The Eurographics Association, 2024) Russo, Alessandro; Fayyaz, Nikoo; Franceschini, Andrea; Caputo, Ariel; Garro, Valeria; Giachetti, Andrea; Castellani, Umberto; Dulecha, Tinsae GebrechristosInteractive multimedia artworks pose unique challenges for their preservation, such as the obsolescence of original components, software, and playback devices, and other issues related to their interactive and time-based nature. The Centro di Sonologia Computazionale (CSC) of the University of Padova developed the Multilevel Dynamic Preservation (MDP) model, which aims at ensuring the long-term preservation of multimedia artworks by treating them as dynamic objects. Reactivation is a fundamental step for allowing their preservation, and, among various reactivation strategies, Virtual Reality (VR) provides a unique opportunity to recreate the immersive experience while still maintaining the concept of the original artwork. The CSC started to work together with Italian artist Roberto Taroni, a central figure in the experimental scenario, who often combined music and visual arts in his works. This contribution concerns the reactivation in VR of Roberto Taroni's artwork ''Dissonanze Circolari'' from 1999. This installation featured a room with 16 speakers, each one playing a fragment of Beethoven's piano performance, Op.111, executed by different musicians, creating a dissonance-based immersive experience. The reactivation was carried out using the documentation provided by the artist and the audio samples from the original installation. The VR environment was created using the game engine Unreal Engine 5. This reactivation approach allows to maximize access to the artwork, providing new information for curators, scholars, and art enthusiasts.Item Study of the Influence of User Characteristics on the Virtual Reality Presence(The Eurographics Association, 2018) Mayor, Jesús; Sánchez, Alberto; Raya, Laura; GarcÃa-Fernández, Ignacio and Ureña, CarlosIn recent years, virtual reality has grown a lot in different areas of application, including ludic, social and research, being used by a large and growing number of users with different profiles. Presence is one of the most distinctive and important features of a virtual reality experience. The aim of this article is to study the most suitable areas of application for users and to analyze the influence of different characteristics of the user's profile in the perceived presence. We have tested the interest applications indicated by 159 subjects and we have designed an immersive virtual reality experience, testing the behavior and performance of 48 users. The results obtained show that gender can influence the perceptual sensation of presence in these types of virtual environments.