Silhouette Enhanced Point-Based Rendering (2009)
José Luiz Luz, Luiz Velho, Paulo Cezar, P. Carvalho
With the recent advances in the 3D scanning field, the size of datasets to be displayed has increased up to billions of points. Typically, we have a dense, unstructured set of points without...
Wavelet Transform And Simplicity Based Heart Murmur Segmentation (2009)
D Kumar, P Carvalho, M Antunes, J Henriques, M Maldonado, R Schmidt, ...
This paper is aimed at the identification of the boundaries of murmur present in heart sound. Heart murmurs provide crucial diagnosis information for several heart diseases such as natural or...
3,3′,5,5′-Tetranitrobiphenyl (2009)
N. Hammond, P. Carvalho, Y. Wu, M. A. Avery
The title compound, C12H6N4O8, is a biphenyl system that was synthesized as a building block for a new series of antimalarial compounds. The aromatic rings are oriented at a dihedral angle of...
AN ECG COMPRESSION APPROACH BASED ON A SEGMENT DICTIONARY AND BEZIER APPROXIMATIONS (2008)
M. Brito, J. Henriques, P. Carvalho, B. Ribeiro, M. Antunes
This paper proposes a methodology for ECG (electrocardiograms) data compression based on R-R segmentation. An ECG can be seen as a quasi-periodic signal, where it is possible to find many...
A MULTICONSTRAINED QOS AWARE SCHEDULER FOR CLASS-BASED IP NETWORKS ABSTRACT (2008)
P. Sousa, P. Carvalho, V. Freitas
This article presents a modular scheduler with powerful semantics able to differentiate simultaneously multiple QoS metrics in classbased IP networks. In opposition to traditional scheduling...
Visualization of Density Variation in Lung (2008)
Paulo Cezar, P. Carvalho, Marcelo Gattass C
We propose a method for visualize lung nodule, in order to emphasize their internal structures. This provides an additional tool for diagnosis, which is traditionally based on the analysis of shape,...
Silhouette Enhanced Point-Based Rendering (2008)
José Luiz Luz, Luiz Velho, Paulo Cezar, P. Carvalho
With the recent advances in the 3D scanning field, the size of datasets to be displayed has increased up to billions of points. Typically, we have a dense, unstructured set of points without...
Motion Reconstruction using Moments Analysis (2008)
Lourena Rocha, Luiz Velho, Paulo Cezar, P. Carvalho
Abstract. This paper presents a method for motion reconstruction. The approach is based on image moments and the bsp-tree data structure. We use invariant properties of these moments to construct a...
VIDEO INTERPOLATION THROUGH GREEN’S FUNCTIONS OF MATCHING EQUATION (2008)
Perfilino Eugênio, Paulo Cezar, P. Carvalho, Luiz Velho
We propose a novel approach for generating video interpolating frames from optical flow information. Our approach is based on solving an affine image-matching equation via the Green’s function...
Motion Reconstruction using Moments Analysis (2008)
Lourena Rocha Luiz, Luiz Velho, Paulo Cezar, P. Carvalho
This paper presents a method for motion reconstruction. The approach is based on image moments and the bsp-tree data structure. We use invariant properties of these moments to construct a bsp-tree...
IMAGE PROCESSING IN PARALLEL VIRTUAL MACHINES SOME EXPERIMENTS AND CONCLUSIONS (2007)
C. Vaz, J. Lopes, F. Duarte, P. Carvalho
Abstract: It is well known that some of the most commonly used algorithms can become of extreme painful execution because of their computational costs. This makes virtually impossible to use them in...
P. Carvalho, N. Costa, B. Ribeiro, A. Dourado
Detection of elliptical shapes is of extreme importance in several computer vision ap-plications. In this paper a new method for irregular elliptical shapes localization in multi-connected regions is...
AN AUTOMATIC OPTICAL SENSOR FOR VESSELS AND FIBBERS QUALITY INSPECTION IN PULP PRODUCTION (2007)
P. Carvalho, H. Araújo, A. Dourado
Abstract: Wood quality assessment is an important issue in the pulp and paper industry. In this paper an automatic visual inspection system for wood structural quality measurement is described. To...
P. Carvalho, N. Costa, B. Ribeiro, A. Dourado
Abstract- Detection of elliptical shapes is of extreme importance in several computer applications. In this paper we describe a new method for highly irregular elliptical object localisation based on...
Self-adaptive Distributed Management of QoS and SLSs in Multiservice Networks (2005)
S. Rito Lima, P. Carvalho, V. Freitas
Distributed service-oriented traffic control mechanisms, operating with minimum impact on network performance, assume a crucial role as regards controlling services quality and network resources...
Giustetto, C., Bertona, R., Rossetti, G., Riccardi, R., Sibona, A., Bruna, C., ...
Background The issue of risk stratification in Brugada syndrome is still unanswered. Methods In the Piemonte region registry, patients with Brugada sign at ECG were prospectively evaluated. EP study...
Algorithms for Assisted Diagnosis of Solitary Lung Nodules in Computerized Tomography Images (2004)
Aristófanes C. Silva, Paulo Cezar, P. Carvalho, Rodolfo A. Nunes, Marcelo Gattass, Aristófanes C. Silva, ...
The contents of this report are the sole responsibility of the authors. O conteúdo do presente relatório é de única responsabilidade dos autores.
Texture Blending to Point Sampled Geometry (2004)
Jose Luiz, Soares Luz, Paulo Cezar Carvalho, Luiz Velho, José Luiz Luz, Luiz Velho, ...
The contents of this report are the sole responsibility of the authors. O conteúdo do presente relatório édeúnica responsabilidade dos autores.
Real-Time Rendering of Photo-Textured Terrain Height Fields (1998)
Luiz Carlos Guedes, Marcelo Gattass, Paulo Cezar, P. Carvalho
Interactive tridimensional visualization of terrain models can be found in Geographical Information Systems and computer games. Both applications share the need for high performance algorithms that...
Industrial visual inspection of lime balls by neural networks (1997)
P. Carvalho, N. Costa, B. Ribeiro, A. Dourado
Lime ball quality inspection is an important task in the pulp and paper industry. In this paper a new method, build-up on a neural network and a path search method, is introduced for lime ball...
Real-Time Rendering of Photo-Textured Terrain Height Fields (1997)
Luiz Carlos Guedes, Marcelo Gattass, Paulo Cezar, P. Carvalho
Abstract. Interactive tridimensional visualization of terrain models can be found in Geographical Information Systems and computer games. Both applications share the need for high performance...