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10º Encontro Português De Computação Gráfica

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10º Encontro Português De Computação Gráfica Actas do 10º Encontro Português de Computação Gráfica 1 – 3 de Outubro 2001 Lisboa – Portugal Patrocinadores de Honra Patrocinadores Organização 10º Encontro Português de Computação Gráfica 1-3 de Outubro 2001 PREFÁCIO A investigação, o desenvolvimento e o ensino na área da Computação Gráfica constituem, em Portugal, uma realidade positiva e de largas tradições. O Encontro Português de Computação Gráfica (EPCG), realizado no âmbito das actividades do Grupo Português de Computação Gráfica (GPCG), tem permitido reunir regularmente, desde o 1º EPCG realizado também em Lisboa, mas no já longínquo mês de Julho de 1988, todos os que trabalham nesta área abrangente e com inúmeras aplicações. Pela primeira vez no historial destes Encontros, o 10º EPCG foi organizado em ligação estreita com as comunidades do Processamento de Imagem e da Visão por Computador, através da Associação Portuguesa de Reconhecimento de Padrões (APRP), salientando-se, assim, a acrescida colaboração, e a convergência, entre essas duas áreas e a Computação Gráfica. Tal como nos Encontros anteriores, o programa está estruturado ao longo de três dias, sendo desta vez o primeiro dia dedicado a seminários por conferencistas convidados e os dois últimos à apresentação de comunicações e de "posters", decorrendo em simultâneo o Concurso para Jovens Investigadores, uma Exibição Comercial e, pela primeira vez, um Atelier Digital. Como novidade essencialmente dedicada aos jovens, realiza-se ainda em paralelo com o Encontro um torneio de jogos de computador. Em resposta ao apelo às comunicações para este 10º EPCG foram submetidos 38 trabalhos, na sua maioria de grande qualidade, tendo sido seleccionadas pela Comissão de Programa, após um cuidadoso processo de avaliação, apenas 19 comunicações; aos autores de 14 dos restantes trabalhos, considerados suficientemente promissores, foi sugerida a sua reformulação e uma nova submissão como "posters". Posteriormente foram submetidas 10 comunicações curtas ("posters") das quais seleccionámos oito. As comunicações seleccionadas, que se incluem nestas Actas, aparecem agrupadas em seis sessões técnicas: Síntese de Imagem, Interacção, Modelação e Visualização, Processamento de Imagem, Animação e Multimédia, e Ambientes Virtuais. Tal como nos eventos anteriores, estamos convictos que foi possível, mais uma vez, estabelecer um programa de elevado interesse e qualidade técnico-científica, motivador para todos os participantes no 10º EPCG. A realização de um evento como o Encontro Português de Computação Gráfica só é possível com o trabalho árduo e a colaboração empenhada de um grande grupo de voluntários e várias instituições, sendo devida uma palavra de sincero agradecimento a todos os que para ele contribuíram. Os Presidentes da Comissão Organizadora e da Comissão de Programa gostariam de agradecer: Aos membros da Comissão Organizadora, em particular à Fátima Estevens, o empenho e o entusiasmo postos na concretização das inúmeras tarefas que a organização deste evento implica; Aos membros da Comissão de Programa e aos revisores externos, a motivação e o cuidado que dedicaram à avaliação e selecção dos trabalhos submetidos; Aos conferencistas convidados, Augusto Albuquerque, Fausto Bernardini, David Breen, Ken Musgrave, Jivka Ovtacharova e Demetri Terzopoulos, a disponibilidade para estarem presentes e partilharem com os participantes o seu saber e as suas experiências; Aos autores de todas as submissões, a motivação, o empenho e o esforço que puseram na escrita dos seus trabalhos. Finalmente agradecemos a todas as instituições que apoiaram a realização do 10º Encontro Português de Computação Gráfica, especialmente à Hewlet Packard, particularmente à Rita Cordovil e ao Luis Monteiro, à Fundação para a Ciência e Tecnologia, à Fundação Luso-Americana para o Desenvolvimento, ao Ministério da Educação, ao Instituto Superior de Ciências do Trabalho e da Empresa, à IBM, em particular à Filipa Valente, à Next Vision, na pessoa do Carlos Leitão, à Silicon Graphics, à Micrograf, à Autodesk, ao INSAT, à UniWeb, ao Instituto de Comércio Externo e, ainda, à ADETTI, ao DCTI-ISCTE e ao INESC, co-organizadores com a APRP e o GPCG deste evento. Lisboa, Outubro de 2001 Joaquim Madeira Jorge Salvador Marques Miguel Salles Dias Joaquim A. Jorge 10º Encontro Português de Computação Gráfica 1-3 de Outubro 2001 Comissão Organizadora José Miguel Salles Dias (ISCTE/ADETTI), Presidente Alcina Prata (Instituto Politécnico de Setúbal) Bento Correia (INETI) Fátima Estevens (ADETTI) Fátima Silva (DCTI-ISCTE) João Pereira (IST/INESC) Manuel Gamito (ADETTI) Manuel Sequeira (ISCTE/ADETTI) Pedro Faria Lopes (ISCTE/ADETTI) Comissão do Programa Joaquim Madeira (UC), Co-Presidente Jorge Salvador Marques (IST/ISR), Co-Presidente A. Augusto de Sousa (FEUP/INESC) Adriano Martins Lopes (UC) Adérito Fernandes Marcos (UM/CCG) Armando Pinho (UA/IEETA) Aurélio Campilho (FEUP) Beatriz Sousa Santos (UA/IEETA) Fernando Nunes Ferreira (FEUP/INESC) Fernando Muge (IST) Francisco Feito (Univ. Jáen, Espanha) Fernando Pereira (IST/IT) Hélder Araújo (UC/ISR) Isabel Ribeiro (IST/ISR) João Bernardo (IST) João Brisson Lopes (IST) João Duarte Cunha (LNEC) João Paulo Costeira (IST) João Pereira (IST/INESC) Joaquim Jorge (IST/INESC) José Bulas Cruz (UTAD) José Carlos Teixeira (UC) J. Delgado Domingos (IST) José Dionísio (IST/IDMEC) José Manuel Rebordão (FCL) José Miguel Salles Dias (ISCTE/ADETTI) José Santos Victor (IST/ISR) Jorge Padilha (FEUP) Juan Carlos Torres (Univ. Granada, Espanha) Manuel Gamito (ADETTI) Manuel Próspero dos Santos (UNL) Mário Rui Gomes (IST/INESC) Mário Martins (UM) Nuno Correia (UNL) Pedro Faria Lopes (ISCTE/ADETTI) Pere Brunet (Univ. Pol. Catalunya, Espanha) Rafael Bidarra (Univ. Téc. Delft, Holanda) Rogério Caldas Pinto (IST) Vasco Branco (UA/INESC) Xavier Pueyo (Univ. Girona, Espanha) Recensores Externos Michal Koutek - Univ. Téc. Delft, Holanda Hiroshi Masuda - Univ. Tóquio, Japão Wu Shin-Ting - UNICAMP, Brasil II 10º Encontro Português de Computação Gráfica 1-3 de Outubro 2001 Lista de Artigos A Realidade Virtual como Ferramenta de Treino para Montagem de Cablagens Eléctricas Luís Grave, Cristina Escaleira, António F. Silva e Adérito Fernandes Marcos ................................147 Alisamento e dizimação de malhas triangulares Roberto Lam, Robert Loke e Hans du Buf .................................................................................... 97 ARENA and WOXBOT: Some Steps towards the Animation of Cognitive Characters Acting in a Virtual World Fábio R. Miranda, J. Kögler Junior, Márcio Lobo Netto e E. Del Moral Hernandez .........................131 Automatic Feature Extraction on Pages of Antique Books Through a Mathematical Morphology Based Methodology Isabel Granado, Pedro Pina e Fernando Muge............................................................................115 Comparing matching strategies for Renaissance printed words J. Caldas Pinto, A. Marcolino, M. Ramalho, F. Muge, N. Sirakov e P. Pina ....................................123 Construção e gestão da complexidade de cenários urbanos 3D em ambientes virtuais imersivos João Pimentel, Nuno Batista, Luís Goes e José Dionísio..............................................................165 Dynamic Algorithm Selection: A New Approach to the Real-Time Rendering of Complex Scenes Problem Pedro Pires e João Pereira ......................................................................................................... 23 Estratégias de desenvolvimento de jogos multimedia Pedro Faria Lopes, Maria Vasconcelos Moreira e Hugo Pereira ...................................................141 Holodeck: uma técnica para Armazenamento e Busca Eficientes de Raios Luminosos em Síntese de Imagem Ana Cláudia Nogueira, A. Augusto Sousa e A. Cardoso Costa ........................................................ 1 IDL: Uma Linguagem para a Detecção de Interferências Geométricas Pedro Santos, Manuel Gamito e José Miguel Salles Dias .............................................................. 77 Interactive facilities for collaborative feature modelling on the Web Rafael Bidarra, Eelco van den Berg e Willem F. Bronsvoort .......................................................... 43 Interfaces caligráficas RISC João P. Pereira, Joaquim A. Jorge, Vasco A. Branco e F. Nunes Ferreira ..................................... 53 Jogo do Galo, Agente de Apoio à Utilização de Jogos por Deficientes Profundos António Pereira, Ricardo Amaro, Ana Paiva e João Brisson Lopes ................................................ 69 Jogos de Guerra e Paz Helder Batista, Vasco Costa e João Pereira ................................................................................157 Procedural terrains with overhangs Manuel N. Gamito e F. Kenton Musgrave ..................................................................................... 33 Síntese de Imagem para Ambientes Virtuais: Experiências com a técnica RENDERCACHE A. Valle de Carvalho, A. Augusto de Sousa e A. Cardoso Costa.................................................... 11 Vision-Based Interaction within a Multimodal Framework Vítor Sá, Cornelius Malerczyk e Michael Schnaider ...................................................................... 61 Visualização interactiva tridimensional em Java3D Bruno Caiado, Luís Correia e João Brisson Lopes ........................................................................ 87 Wavelet Compression and Transmission of Deformable Surfaces over Networks António Calado Lopes, Manuel Gamito e José Miguel Salles Dias ................................................107
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