Técnicas de reconstrução e renderização de vídeo-avatares para educação e jogos eletrônicos.

Abstract

Este exemplar foi revisado e alterado em relação à versão original, sob responsabilidade única do autor e com a anuência de seu orientador. São Paulo, 06 de julho de 2010. Assinatura do autor ___________________________________________ Assinatura do orientador _______________________________________ Dedico este trabalho aos meus pais, a todos que me apoiaram todo este tempo e ao futuro brilhante de todos. AGRADECIMENTOS , que me ajudaram no desenvolvimento deste trabalho, me deram ideias, geraram debates e principalmente me aturaram por todo este tempo. Também agradeço os alunos de graduação da POLI, Fábio Luiz Picchi, Anderson J. C. Cunha e André Uyeda, pelo auxílio na criação de aplicativos e na aplicação de testes. Os alunos de graduação do curso de design da FAU, Bruno S. Viana, Carina Missae B. Costa, Heloisa Yoshioka, Pedro G. Câmara e Samuel Henrique Sabadine da Cruz, por auxiliarem nos trabalhos de design e modelagem dos objetos 3D utilizados neste trabalho. Esta dissertação não teria sido possível sem o apoio das instituições CAPES, pelo apoio com a bolsa, e FAPESP, com projeto Tidia que deu origem a este trabalho e auxiliou com as ferramentas utilizadas ao longo do trabalho. Por fim, agradeço todos aqueles que me ajudaram diretamente ou indiretamente e que não listei aqui. E também, todos aqueles que não ajudaram, pois acredito que minimamente tiveram a boa vontade. ABSTRACTProviding good immersion experiences for users interacting with virtual contents or an environment is one of the main challenges for developers and researchers in interactive technologies, mainly virtual and augmented reality. Especially in areas of education and entertainment, in which the engagement of the user and the significance of content are of crucial importance for the success of the application, the search for experiences that approximate to one of a "total immersion" of the participant is common practice. When interaction at distance is necessary, one way to provide better immersion experiences is the use of a solution called "Immersive Telecommunication System". This kind of system can provide the sharing of the virtual environment among participants, information exchange among them, and also their interaction with the virtual environment. One of the most important component of these systems is the "video-avatar", the representation of the participant in the virtual environment based on a video of the participant captured in real-time.This work presents new approaches of geometric reconstruction and rendering for the creation of a video-avatar. First, a theoretical model to modularize the existing reconstruction and rendering approaches was proposed. Based on this model, a new approach of geometric reconstruction and rendering, called "Video-based Microfacet Billboarding", was conceived. This approach uses a technique of real-time reconstruction and rendering that enables the representation of the object details and improves the integration of the avatar in the virtual environment. In this work, it is also proposed the co...

Super-Sensitive Protonation Behavior of Trifluoroethoxy-Substituted Phthalocyanines and Their Application to Solvent Discrimination

“…The purely nonaggregation properties of the TFEO-Pcs lead to sharp Q-bands, which are attractive for applications in chemical sensors in terms of clarity and responsivity . During our research on the design, synthesis, and spectral properties of TFEO-Pcs and their derivatives, we noticed that TFEO-Pcs are extremely sensitive toward their protonation in solvents (Figure a) . The UV–vis spectra of TFEO-Pcs are highly solvent- and concentration-dependent, which can be observed even by the naked eye.…”

“…4b,6 Although the protonation of Pcs regularly requires acids, TFEO-Pcs are spontaneously protonated, even in neutral chlorinated solvents such as chloroform. 5 Thus, TFEO-Pcs exhibit a very high susceptibility for the acceptance of protons via the nitrogen atom at the meso-position (Figure 1b), which is increased by the influence of the TFEO group at the α-position. 6g Even though it is possible in some cases to visually examine solvent acidity because of drastic color changes, we describe herein the response of TFEO-Pcs to protons quantitatively, which allows applications in super-sensitive proton sensors.…”

“…4 During our research on the design, synthesis, and spectral properties of TFEO-Pcs and their derivatives, 3 we noticed that TFEO-Pcs are extremely sensitive toward their protonation in solvents (Figure 1a). 5 The UV–vis spectra of TFEO-Pcs are highly solvent- and concentration-dependent, which can be observed even by the naked eye. The protonation of Pcs has been well investigated because protonated Pcs are expected to find applications in various areas because of their electronic properties, which include absorption, fluorescence, aggregation, and photochemical features upon protonation.…”

“…The UV–vis spectra of TFEO-Pcs are highly solvent- and concentration-dependent, which can be observed even by the naked eye. The protonation of Pcs has been well investigated because protonated Pcs are expected to find applications in various areas because of their electronic properties, which include absorption, fluorescence, aggregation, and photochemical features upon protonation. , Although the protonation of Pcs regularly requires acids, TFEO-Pcs are spontaneously protonated, even in neutral chlorinated solvents such as chloroform . Thus, TFEO-Pcs exhibit a very high susceptibility for the acceptance of protons via the nitrogen atom at the meso-position (Figure b), which is increased by the influence of the TFEO group at the α-position .…”