Percorrer por autor "Mouysset, Sandrine"
A mostrar 1 - 2 de 2
Resultados por página
Opções de ordenação
- Dental image segmentation by clustering methodsPublication . Balsa, Carlos; Alves, Cláudio; Guivarch, Ronan; Mouysset, SandrineSegmentation of dental radiography allows the identification of human individuals but also could be used for the development of more effective diagnostic, monitoring, and evaluation of appropriate treatment plans. In practice, dark background and bones tissues are not distinguished with contour extraction methods on dental images. So we propose to first apply the k-means method and then extract the contours on the clustering result. We present an initialization of the k centroids based on the grey scale histograms, a weighted norm that includes both grey scale and geometrical information, and tests it on dental X-ray images. Then we describe a promising parallel clustering method based on kernel affinity.
- Numerical simulation of the thermal effects of localized firesPublication . Balsa, Carlos; Béjannin, Baptiste; Mouysset, Sandrine; Piloto, P.A.G.The thermal effects of a localized fire bellow a concrete slab with the length of 10 m and the thickness of 30 cm is simulated. The nonlinear equation of heat transfer was solved by finite differences using an implicit scheme. The appropriate mesh size in the direction corresponding to the heat flux resulting from the fire was defined. The temperature results of the two dimensional simulation does not depend on the dimension of the mesh size in the horizontal direction (perpendicular to the heat flux).