Browsing by Author "Vieira, L."
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- Comparison between 3D laser scanning and computed tomography on the modelling of head surfacePublication . Sousa, E.; Vieira, L.; Costa, D. M. S.; Costa, D. C.; Parafita, R.; Loja, AméliaThe measurement of people physical parameters and proportions constitutes an importante field of science, the anthropometry, since it is related to the characterization of the human size and constitution; it allows improving the design and sizing of systems and devices to human use. To enable these measurements, different direct and indirect methodologies may be used depending on the particular aim of a specific study and on the eventual availability of data sources that can be used also for this purpose. Because of this relevance, the present work intends to assess the influence of diferente acquisition and reconstruction methods in the modelling of a 3D head surface. In order to assess the significance of the differences between acquisition and reconstruction methods a set of measurements between several anatomic references of a physical phantom were carried out. Statistical evaluation using the Friedman test for non-parametrical pared samples was considered. We found, so far, no statistically significant differences between the several methods considered for acquisition and reconstruction.
- Finite element techniques for medical image processingPublication . Almeida, A.; Barbosa, Joaquim; Carvalho, A.; Loja, Amélia; Portal, Ricardo; Rodrigues, José Alberto; Vieira, L.We consider some second-order variational model for solving medical image problems. The aim is to obtain as far as possible fine features of the initial image and identify medical pathologies. The approach consists of constructing a family of regularized functionals and to select locally and adaptively the regularization parameters. The parameters selection is performed at the discrete level in the framework of the finite element method. We present several numerical simulations to test the efficiency of the proposed approach.
- Pensar a marioneta - FIMFA Lx: Conversas e reflexõesPublication . Firmo, C.; Vieira, L.; Falcão, MiguelO livro reúne um conjunto de textos decorrentes do ciclo de conversas intitulado "Pensar a marioneta: Conversas com muito chá", integrado na vigésima primeira edição do Festival Internacional de Marionetas e Formas Animadas. Este ciclo foi organizado em parceria entre a organização do festival, o Centro de Estudos de Teatro da Faculdade de Letras da Universidade de Lisboa (CET-FLUL) e a Escola Superior de Educação do Instituto Politécnico de Lisboa (ESELx-IPL), que inclui, na sua oferta formativa, a Pós-graduação em Marionetas e Formas Animadas. Nestes textos, dedicados à criação contemporânea e à tradição nas artes da marioneta, cruzam-se diferentes olhares sobre esta forma de teatro e a sua ligação com as outras artes.