Encontrados 36 documentos, a visualizar página 1 de 4
Image segmentation by graph partitioning
Torres, Ana Sofia; Monteiro, Fernando C.In this paper we propose an hybrid method for the image segmentation which combines the edge-based, region-based and the morphological techniques in conjunction through the spectral based clustering approach. An initial partitioning of the image into atomic regions is set by applying a watershed method to the image gradient magnitude. This initial partition is the input to a computationally efficient region seg...
Distance measures for image segmentation evaluation
Monteiro, Fernando C.; Campilho, Aurélio C.In this paper we present a study of evaluation measures that enable the quantification of the quality of an image segmentation result. Despite significant advances in image segmentation techniques, evaluation of these techniques thus far has been largely subjective. Typically, the effectiveness of a new algorithm is demonstrated only by the presentation of a few segmented images and is otherwise left to subject...
A electrodeposição sobre alumínio : tratamentos prévios em solução modificada d...
Monteiro, Fernando Jorge MendesDissertação apresentada para obtenção do grau de Doutor em Engenharia Metalúrgica, na Faculdade de Engenharia da Universidade do Porto, sob a orientação do Prof. Doutor Mário A. Barbosa
Region-based spatial and temporal image segmentation
Monteiro, Fernando Jorge CoutinhoTese de doutoramento. Engenharia Electrotécnica e de Computadores. Faculdade de Engenharia. Universidade do Porto. 2007
Optic disc detection using ant colony optimization
Dias, Marcy; Monteiro, Fernando C.The retinal fundus images are used in the treatment and diagnosis of several eye diseases, such as diabetic retinopathy and glaucoma. This paper proposes a new method to detect the optic disc (OD) automatically, due to the fact that the knowledge of the OD location is essential to the automatic analysis of retinal images. Ant Colony Optimization (ACO) is an optimization algorithm inspired by the foraging behavi...
Optic disc detection in retinal images by pattern distance minimization
Dias, Marcy; Monteiro, Fernando C.The retinal fundus photograph is widely used in the diagnosis and treatment of various eye diseases such as diabetic retinopathy and glaucoma. On the research work leading to automatic analysis of retinal images, the knowledge of the optic disc (OD) location is essential, and a new method to locate the optic disc automatically is proposed. We propose an algorithm for the detection of OD in the retina which take...
Brain segmentation in head CT images
Torres, Ana Sofia; Monteiro, Fernando C.Brain segmentation in head computed tomography scans is essential for the development of computer-aided diagnostic methods for identifying the brain diseases. In this paper we present a hybrid framework to brain segmentation which joints region-based information based on watershed transform with clustering techniques. A pre-processing step is used to reduce the spatial resolution without losing important image ...
Monitoring feet temperature using thermography
Bento, David; Pereira, Ana I.; Monteiro, Fernando C.Studies show that regular monitoring of feet temperature may limit the incidence of disabling conditions such as foot ulcers and lower-limb amputations. Infrared thermometry and liquid crystal thermography were identified as the leading technologies in use today. In this study, we analysed the maximum temperature and tested some mathematical models for the foot temperature distribution.
Moçambique 1964/1974: o factor mítico-religioso como elemento de segurança ou d...
Monteiro, FernandoNa Guerra de África (1961/74) a situação nos três teatros envolvidos implicaria como elementar, em qualquer deles, conhecer o terreno humano. Moçambique (1964/74) oferecia nisso grande complexidade, não só pela variedade das etnias como pela densidade percentual e cultural de algumas. Numa guerra subversiva, revolucionária, na qual as populações eram por definição o alvo essencial dos contendores (a guerrilha e...
Constituição Anotada da República Democrática de Timor-Leste
Vasconcelos, Pedro Carlos Bacelar de; Oliveira, Andreia Sofia Pinto; Cunha, Ricardo Sousa da; Baptista, Andreia Rute da SilvaA independência de Timor-Leste, proclamada pela Frente Revolucionária do Timor-Leste Independente (FRETILIN) em 28 de novembro de 1975, vê-se internacionalmente reconhecida a 20 de maio de 2002, uma vez concretizada a libertação do povo timorense da colonização e da ocupação ilegal da Pátria Maubere por potências estrangeiras. A elaboração e adoção da Constituição da República Democrática de Timor- -Leste culmi...
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