Sciweavers

SIBGRAPI
2005
IEEE
14 years 5 months ago
A Linear Algorithm for Exact Pattern Matching in Planar Subdivisions
Graph sub-isomorphism is a very common approach to solving pattern search problems, but this is a NP-complete problem. This way, it is necessary to invest in research of approxima...
Pedro Ribeiro de Andrade Neto, André Luiz P...
SIBGRAPI
2005
IEEE
14 years 5 months ago
A Maximum Uncertainty LDA-Based Approach for Limited Sample Size Problems : With Application to Face Recognition
A critical issue of applying Linear Discriminant Analysis (LDA) is both the singularity and instability of the within-class scatter matrix. In practice, particularly in image recog...
Carlos E. Thomaz, Duncan Fyfe Gillies
SIBGRAPI
2005
IEEE
14 years 5 months ago
Two-Level Interaction Approach for Transfer Function Specification
Direct volume rendering techniques are used to visualize and explore large scalar volumes. Transfer functions (TFs) that assign opacity and color to scalar values are very importa...
João Luis Prauchner, Carla M. D. S. Freitas...
SIBGRAPI
2005
IEEE
14 years 5 months ago
An Image-Based Shading Pipeline for 2D Animation
Shading for cel animation based on images is a recent research topic in computer-assisted animation. This paper proposes an image-based shading pipeline to give a 3D appearance to...
Hedlena M. de A. Bezerra, Bruno Feijó, Luiz...
SIBGRAPI
2005
IEEE
14 years 5 months ago
Boolean Operations on Surfel-Bounded Objects Using Constrained BSP-Trees
Point-based modeling and rendering is an active area of research in Computer Graphics. The concept of points with attributes (e.g. normals) is usually referred to as surfels, and ...
Marcus A. C. Farias, Carlos Eduardo Scheidegger, J...
SIBGRAPI
2005
IEEE
14 years 5 months ago
A Brief Account of the Relations between Gray-Scale Mathematical Morphologies
Mathematical morphology was originally conceived as a set theoretic approach for the processing of binary images. Approaches that extend classical binary morphology to gray-scale ...
Peter Sussner, Marcos Eduardo Valle
SIBGRAPI
2005
IEEE
14 years 5 months ago
Ridge-Based Fingerprint Matching Using Hough Transform
Despite the efficacy of minutia-based fingerprint matching techniques for good-quality images captured by optical sensors, minutia-based techniques do not often perform so well on...
Aparecido Nilceu Marana, Anil K. Jain
SIBGRAPI
2005
IEEE
14 years 5 months ago
CHF: A Scalable Topological Data Structure for Tetrahedral Meshes
Marcos Lage, Thomas Lewiner, Hélio Lopes, L...